UNITED STATES
                             SECURITIES AND EXCHANGE COMMISSION
                                   WASHINGTON, D.C. 20549



                                          FORM 10-K


  (Mark one)

  /X/ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934
      For the fiscal year ended December 31, 2005

      OR



  / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934


      Commission File Number:  333-116258-04


        Credit Suisse First Boston Mortgage Securities Corp.
        Commercial Mortgage Pass-Through Certificates,
        Series 2005-C4

     (Exact name of registrant as specified in its charter)


  New York                                          54-6675899
  (State or other jurisdiction of                   54-2182261
  incorporation or organization)                    54-2182262
                                                    (I.R.S. Employer
                                                    Identification No.)


   c/o Wells Fargo Bank, N.A.
   9062 Old Annapolis Road
   Columbia, MD                                21045
  (Address of principal executive offices)    (Zip Code)


  Registrant's telephone number, including area code: (410) 884-2000


  Securities registered pursuant to Section 12(b) of the Act:

        NONE.


  Securities registered pursuant to Section 12(g) of the Act:

        NONE.


  Indicate by check mark if the registrant is a well-known seasoned issuer,
  as defined in Rule 405 of the Securities Act.

        Yes  ___     No  X


  Indicate by check mark if the registrant is not required to file reports
  pursuant to Section 13 or Section 15(d) of the Act.

        Yes  ___     No  X


  Indicate by check mark whether the registrant (1) has filed all reports
  required to be filed by Section 13 or 15(d) of the Securities Exchange
  Act of 1934 during the preceding 12 months (or for such shorter period
  that the registrant was required to file such reports), and (2) has been
  subject to such filing requirements for the past 90 days.

        Yes  X       No  ___


  Indicate by check mark if disclosure of delinquent filers pursuant to
  Item 405 of Regulation S-K ( 229.405 of this chapter) is not contained
  herein, and will not be contained, to the best of registrant's knowledge,
  in definitive proxy or information statements incorporated by reference
  in Part III of this Form 10-K or any amendment to this Form 10-K.

        Not applicable.


  Indicate by check mark whether the registrant is a large accelerated filer,
  an accelerated filer, or a non-accelerated filer. See Definition of
  "accelerated filer and large accelerated filer" in Rule 12b-2 of the
  Exchange Act. (Check One):


  Large Accelerated Filer ___  Accelerated Filer ___  Non-Accelerated Filer X


  Indicate by check mark whether the registrant is a shell company (as
  defined in Rule 12b-2 of the Act).

        Yes  ___     No  X


  State the aggregate market value of the voting and non-voting common
  equity held by non-affiliates computed by reference to the price at which
  the common equity was last sold, or the average bid and asked price of
  such common equity, as of the last business day of the registrant's most
  recently completed second fiscal quarter.

        Not applicable.


     Documents Incorporated by Reference

  List hereunder the following documents if incorporated by reference and
  the Part of the Form 10-K (e.g. Part I, Part II, etc.) into which the
  document is incorporated: (1)Any annual report to security holders; (2)
  Any proxy or information statement; and (3)Any prospectus filed pursuant
  to Rule 424(b) or (c) under the Securities Act of 1933. The listed
  documents should be clearly described for identification purposes (e.g.
  annual report to security holders for fiscal year ended December 24, 1980).

        Not applicable.


                                   PART I
  Item 1.  Business.

            Not applicable.


  Item 1A.  Risk Factors.

            Not applicable.


  Item 1B.  Unresolved Staff Comments.

            Not applicable.


  Item 2.  Properties.

            Not applicable.


  Item 3.  Legal Proceedings.

            The registrant knows of no material pending legal proceedings
            involving the trust created under the pooling and servicing
            agreement (the "Trust"), the Trustee, the Master Servicer,
            the Special Servicer or the registrant with respect to the
            Trust other than routine litigation incidental to the duties
            of the respective parties.


  Item 4.  Submission of Matters to a Vote of Security Holders.

            None.

                                PART II

  Item 5.  Market for Registrant's Common Equity, Related Stockholder
           Matters and Issuer Purchases of Equity Securities.

            No established public trading market for the Certificates exists.

            Records provided to the Trust by the DTC and the Trustee
            indicate that as of December 31, 2005, the total number of holders
            of record for the Series of Certificates is 33.


  Item 6.  Selected Financial Data.

            Not applicable.

  Item 7.  Management's Discussion and Analysis of Financial Condition and
           Results of Operation.


            Not applicable.


  Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

            Not applicable.


  Item 8.  Financial Statements and Supplementary Data.

            Not applicable.


  Item 9.  Changes in and Disagreements with Accountants on Accounting and
           Financial Disclosure.

            None.


  Item 9A. Controls and Procedures.
            Not applicable.


  Item 9B. Other Information.

            None.


                                PART III

  Item 10. Directors and Executive Officers of the Registrant.

            Not applicable.


  Item 11. Executive Compensation.

            Not applicable.

  Item 12. Security Ownership of Certain Beneficial Owners and Management
           and Related Stockholder Matters.

            Not applicable.

  Item 13. Certain Relationships and Related Transactions.

            Not applicable.


  Item 14. Principal Accounting Fees and Services.

            Not applicable.


                                PART IV

  Item 15. Exhibits, Financial Statement Schedules.

   (a) Exhibits

     (31.1) Rule 13a-14(a)/15d-14(a) Certification

     (99.1) Annual Independent Accountants' Servicing Reports concerning
            servicing activities.

      <TABLE>

      
         <c>
      a) ARCap Servicing, Inc., as Special Servicer <F1>
      b) KeyCorp Real Estate Capital Markets, Inc., as Master Servicer <F1>

      </TABLE>

     (99.2) Report of Management as to Compliance with Minimum Servicing
            Standards.

      <TABLE>

      
        <c>
      a) ARCap Servicing, Inc., as Special Servicer <F1>
      b) KeyCorp Real Estate Capital Markets, Inc., as Master Servicer <F1>

      </TABLE>

     (99.3) Annual Statements of Compliance under the Pooling and Servicing
            Agreements.

      <TABLE>

      
         <c>
      a) ARCap Servicing, Inc., as Special Servicer <F1>
      b) KeyCorp Real Estate Capital Markets, Inc., as Master Servicer <F1>

      </TABLE>


     (99.4) Aggregate Statement of Principal and Interest Distributions to
            Certificate Holders.


   (b) Not applicable.

   (c) Omitted.


  <F1> Filed herewith.


                                SIGNATURES

  Pursuant to the requirements of Section 13 or 15(d) of the Securities
  Exchange Act of 1934, the registrant has duly caused this report to be
  signed on its behalf by the undersigned, thereunto duly authorized:



    Credit Suisse First Boston Mortgage Securities Corp.
    Commercial Mortgage Pass-Through Certificates,
    Series 2005-C4
    (Registrant)


  Signed: Credit Suisse First Boston Mortgage Securities Corp., as Depositor

  By:     Anand Gajjar, Vice President

  By: /s/ Anand Gajjar, Vice President

  Dated: March 29, 2006


  Exhibit Index

  Exhibit No.

  Ex-31.1 Rule 13a-14(a)/15d-14(a) Certification

   I, Anand Gajjar, certify that:

  1. I have reviewed this annual report on Form 10-K, and all reports on
     Form 8-K containing distribution date reports filed in respect of
     periods included in the year covered by this annual report, of
     Credit Suisse First Boston Mortgage Securities Corp., Commercial
     Mortgage Pass-Through Certificates, Series 2005-C4 Trust;

  2. Based on my knowledge, the information in these reports, taken as a
     whole, does not contain any untrue statement of a material fact or
     omit to state a material fact necessary to make the statements made,
     in light of the circumstances under which such statements were made,
     not misleading as of the last day of the period covered by this
     annual report;

  3. Based on my knowledge, the servicing information required to be provided
     to the Trustee by the master servicer and special servicer under the
     pooling and servicing agreement is included in these reports;

  4. I am responsible for reviewing the activities performed by the master
     servicer and special servicer under the pooling and servicing agreement
     and based upon my knowledge and the annual compliance review required
     under the pooling and servicing agreement, and except as disclosed in the
     reports, the master servicer and special servicer have fulfilled their
     obligations under the pooling and servicing agreement; and


  5. The reports disclose all significant deficiencies relating to the
     master servicer's or special servicer's compliance with the minimum
     servicing standards, based upon the report provided by an independent
     public accountant, after conducting a review in compliance with the
     Uniform Single Attestation Program for Mortgage Bankers or similar
     standard, as set forth in the pooling and servicing agreement, that
     is included in these reports.

     In giving the certifications above, I have reasonably relied on
     information provided to me by the following unaffiliated parties:
     ARCap Servicing, Inc. as Special Servicer, KeyCorp Real Estate
     Capital Markets, Inc. as Master Servicer and Wells Fargo Bank,
     N.A. as Trustee.

     Date: March 29, 2006

     /s/ Anand Gajjar
     Signature

     Vice President
     Title


  EX-99.1 (a)
(logo)ERNST & YOUNG

* Ernst & Young LLP
  Suite 1500
  2100 Ross Avenue
  Dallas, Texas 75201

* Phone: (214) 969-8000
  Fax:   (214) 969-8587
  Telex: 6710375
  www.ey.com


Report on Management's Assertion on Compliance
with Minimum Servicing Standards Set Forth in the
Uniform Single Attestation Program for Mortgage Bankers

Report of Independent Accountants

Board of Directors
ARCap Servicing, Inc.

We have examined management's assertion, included in the accompanying report
titled Report of Management, that ARCap Servicing, Inc. (the Company) complied
with the minimum servicing standards as stated in Attachment A, which were
derived from the Mortgage Bankers Association of America's Uniform Single
Attestation Program for Mortgage Bankers (USAP) except, for commercial loan and
multifamily loan servicing, minimum servicing standards V.4. and VI.1., which
the Mortgage Bankers Association of America has interpreted as inapplicable to
such servicing during the year ended December 31, 2005.  Management is
responsible for the Company's compliance with those requirements.  Our
responsibility is to express an opinion on management's assertions about the
Company's compliance based on our examination.

Our examination was made in accordance with attestation standards established by
the American Institute of Certified Public Accountants and, accordingly,
included examining, on a test basis, evidence about the Company's compliance
with those requirements and performing such other procedures as we considered
necessary in the circumstances. We believe that our examination provides a
reasonable basis for our opinion.  Our examination does not provide a legal
determination on the Company's compliance with specified requirements.

In our opinion, management's assertion, that the Company complied with the
aforementioned requirements during the year ended December 31, 2005, is fairly
stated, in all material respects.


/s/Ernst & Young LLP


February 16, 2006


A Member Practice of Ernst & Young Global


[PAGE]

Attachment A

Minimum Servicing Standards


I.   Mortgage Principal, Interest and Amortization

1.   Reconciliations shall be prepared on a monthly basis for all custodial bank
     accounts and related bank clearing accounts. These reconciliations shall:
*         be mathematically accurate;
*         be prepared within forty-five (45) calendar days after the cutoff date
*         be reviewed and approved by someone other than the person who prepared
          the reconciliation; and
*         document explanations for reconciling items. These reconciling items
          shall be resolved within ninety (90) calendar days of their original
          identification.

2.   Funds of the servicing entity shall be advanced in cases where there is an
     overdraft in an investor's or a mortgagor's account.

3.   Each custodial account shall be maintained at a federally insured
     depository institution in trust for the applicable investor.

4.   Escrow funds held in trust for a mortgagor shall be returned to the
     mortgagor within thirty (30) calendar days of payoff of the mortgage loan.

II.  Mortgage Payments

1.   Mortgage payments shall be deposited into the custodial bank accounts and
     related bank clearing accounts within two business days of receipt.

2.   Mortgage payments made in accordance with the mortgagor's loan documents
     shall be posted to the applicable mortgagor records within two business
     days of receipt.

3.   Mortgage payments shall be allocated to principal, interest, insurance,
     taxes or other escrow items in accordance with the mortgagor's loan
     documents.

4.   Mortgage payments identified as loan payoffs shall be allocated in
     accordance with the mortgagor's loan documents.


III. Disbursements

1.   Disbursements made via wire transfer on behalf of a mortgagor or investor
     shall be made only by authorized personnel.

[PAGE]

2.   Disbursements made on behalf of a mortgagor or investor shall be posted
     within two business days to the mortgagor's or investor's records
     maintained by the servicing entity.

3.   Tax and insurance payments shall be made on or before the penalty or
     insurance policy expiration dates, as indicated on tax bills and insurance
     premium notices, respectively, provided that such support has been received
     by the servicing entity at least thirty (30) calendar days prior to these
     dates.

4.   Any late payment penalties paid in conjunction with the payment of any tax
     bill or insurance premium notice shall be paid from the servicing entity's
     funds and not charged to the mortgagor, unless the late payment was due to
     the mortgagor's error or omission.

5.   Amounts remitted to investors per the servicer's investor reports shall
     agree with canceled checks or other form of payment, or custodial bank
     statements.

6.   Unissued checks shall be safeguarded so as to prevent unauthorized access.

IV.  Investor Accounting and Reporting

1.   The servicing entity's investor reports shall agree with, or reconcile to,
     investors' records on a monthly basis as to the total unpaid principal
     balance and number of loans serviced by the servicing entity.

V. Mortgage Loan Accounting

1.   The servicing entity's mortgage loan records shall agree with, or reconcile
     to, the records of mortgagors with respect to the unpaid principal balance
     on a monthly basis.

2.   Adjustments on ARM loans shall be computed based on the related mortgage
     note and any ARM rider.

3.   Escrow accounts shall be analyzed, in accordance with the mortgagor's loan
     documents, on at least an annual basis.

4.   Interest on escrow accounts shall be paid, or credited, to mortgagors in
     accordance with the applicable state laws.

VI.  Delinquencies

1.   Records documenting collection efforts shall maintained during the period
     a loan is in default and shall be updated at least monthly. Such records
     shall describe the entity's activities in monitoring delinquent loans
     including, for example, phone calls, letters and mortgage payment
     rescheduling plans in cases where the delinquency is deemed temporary
     (e.g., illness or unemployment).

(page)

VII. Insurance Policies

1.   A fidelity bond and errors and omissions policy shall be in effect on the
     servicing entity throughout the reporting period in the amount of coverage
     represented to investors in management's assertion.





  EX-99.1 (b)
(logo) ERNST&YOUNG


* Ernst & Young LLP
  1300 Huntington Building
  925 Euclid Avenue
  Cleveland, Ohio 44115-1405

* Phone: (216) 861-5000
  www.ey.com




Report on Management's Assertion on
Compliance with the Specified Minimum Servicing Standards Set Forth in the

Report of Independent Registered Public Accounting Firm


The Board of Directors and Shareholder
KeyCorp Real Estate Capital Markets, Inc.


We have examined management's assertion, included in the accompanying report
titled Report of Management, that KeyCorp Real Estate Capital Markets, Inc.
(the "Company") complied with the servicing standards identified in Exhibit
A (the "specified minimum servicing standards") to the Report of Management
during the year ended December 31, 2005. Management is responsible for the
Company's compliance with these specified minimum servicing standards. Our
responsibility is to express an opinion on management's assertion about the
Company's compliance based on our examination.

Our examination was made in accordance with standards established by the
American Institute of Certified Public Accountants and, accordingly,
included examining, on a test basis, evidence about the Bank's compliance
with the specified minimum servicing standards and performing such other
procedures as we considered necessary in the circumstances. We believe that
our examination provides a reasonable basis for our opinion. Our examination
does not provide a legal determination on the Company's compliance with the
specified minimum servicing standards.

In our opinion, management's assertion that the Company complied with the
aforementioned specified minimum servicing standards during the year ended
December 31, 2005, is fairly stated, in all material respects.



/s/ Ernst & Young LLP


Kansas City, Missouri
January 20, 2006



A Member Practice of Ernst & Young Global

(PAGE)


Exhibit A




Exhibit A

Specified Minimum Servicing Standards

Management of the Company identified the following minimum servicing standards
which are based on the servicing standards set forth in the Mortgage Bankers
Association of America's Uniform Single Attestation Program for Mortgage
Bankers, (USAP) and, in management's opinion, are applicable to servicing
commercial mortgage loans and satisfy the requirements of the underlying
servicing agreements.

I. Custodial Bank Accounts

1. Reconciliations shall be prepared on a monthly basis for all custodial bank
   accounts and related bank clearing accounts. These reconciliations shall:
     * be mathematically accurate;
     * be prepared within forty-five (45) after the cutoff date;
     * be reviewed and approved by someone other than the person who prepared
       the reconciliation; and
     * document explanations for reconciling items. These reconciling items
       shall be resolved within ninety (90) calendar days of their original
       identification.

2. Funds of the servicing entity shall be advanced in cases where there is an
overdraft in an investor's or a mortgagor's account.

3. Each custodial account shall be maintained at a federally insured depository
   institution in trust for the applicable investor.

4. Escrow funds held in trust for a mortgagor shall be returned to the mortgagor
within thirty (30) calendar days of payoff of the mortgage loan.

II. Mortgage Payments

1. Mortgage payments shall be deposited into the custodial bank accounts and
related bank clearing accounts within two business days of receipts.

2. Mortgage payments made in accordance with the mortgagor's loan documents
shall be posted to the applicable mortgagor records within two business days of
receipt.

3. Mortgage payments shall be allocated to principal, interest, insurance, taxes
or other escrow items in accordance with the mortgagor's loan documents.

4. Mortgage payments identified as loan payoffs shall be allocated in accordance
with the mortgagor's loan documents.


Page 2

(PAGE)


Exhibit A



III. Disbursements

1. Disbursements made via wire transfer on behalf of a mortgagor or investor
   shall be made only by authorized personnel.

2. Disbursements made on behalf of a mortgagor or investor shall be posted
   within two business days to the mortgagor's or investor's records maintained
   by the servicing entity.

3. Tax and insurance payments shall be made on or before the penalty or
   insurance policy expiration dates, as indicated on tax bills and insurance
   premium notices, respectively, provided that such support has been received
   by the servicing entity at least thirty (30) calendar days prior to these
   dates.

4. Any late payment penalties paid in conjunction with the payment of any tax
   bill or insurance premium notice shall be paid from the servicing entity's
   funds and not charged to the mortgagor, unless the late payment was due to
   the mortgagor's error or omission.

5. Amounts remitted to investors per the servicer's investor reports shall agree
   with canceled checks or other form of payment, or custodial bank statements.

6. Unissued checks shall be safeguarded so as to prevent unauthorized access.

IV. Investor Accounting and Reporting

1. The servicing entity's investor reports shall agree with, or reconcile to,
   investors' records on a monthly basis as to the total unpaid principal
   balance and number of loans serviced by the servicing entity.

V. Mortgage Loan Accounting

1. The servicing entity's mortgage loan records shall agree with, or reconcile
   to, the records of mortgagors with respect to the unpaid principal balance on
   a monthly basis.

2. Adjustments on ARM loans shall be computed based on the related mortgage note
   and any ARM rider.

3. Escrow accounts shall be analyzed, in accordance with the mortgagor's loan
   documents, on at least an annual basis.






Page 3

(PAGE)


Exhibit A



VI. Insurance Policies

1. A fidelity bond and errors and omissions policy shall be in effect on the
servicing entity throughout the reporting period in the amount of coverage
represented to investors in management's assertion




Page 2

(PAGE)


Exhibit A

Specified Minimum Servicing Standards (continued)
Securitization Trusts

(for informational purposes only)
Commercial mortgage loans owned by the following trusts serviced by the Company
during the year ended December 31, 2005:

                       Sale &Svcg
Pool Name              Agree Dt     Indenture Trustee      Owner Trustee
MCF 1998-MC1           05/29/1998   LaSalle Bank           LaSalle Bank
MCF 1998-MC3           12/31/1998   LaSalle Bank           LaSalle Bank
JPMCC 2005-LDP4        09/27/2005   Wells Fargo Bank       Wells Fargo Bank
MLMT 2005 CK11         12/07/2005   LaSalle Bank           LaSalle Bank
CSFBMSC 2005-C6        12/28/2005   Wells Fargo Bank       Wells Fargo Bank
PSSFC 1998 C-1         08/21/1998   Chase Manhattan Bank   Chase Manhattan Bank
CSFB 2002-CP3          07/01/2002   LaSalle Bank           LaSalle Bank
PSSFC 1999 NRF-1       03/25/1999   Chase Manhattan Bank   Chase Manhattan Bank
CSFB 2002 CP5          12/01/2002   Wells Fargo Bank       Wells Fargo Bank
CBA MEZZ 2004 Cl       02/23/2004   Wells Fargo Bank       Wells Fargo Bank
PSSFC 1999 C-2         07/28/1999   Chase Manhattan Bank   Chase Manhattan Bank
CSFBMSC 2004-CBN1      10/21/2004   Wells Fargo Bank       Wells Fargo Bank
BACM 2005-3            07/13/2005   LaSalle Bank           LaSalle Bank
KEY 2000-Cl            06/29/2000   Chase Manhattan Bank   Chase Manhattan Bank
BACM 2005-5            10/13/2005   LaSalle Bank           LaSalle Bank
BALL 2005-MIB1         11/29/2005   Wells Fargo Bank       Wells Fargo Bank
CSFB 2005 OMA          12/22/2005   Wells Fargo Bank       Wells Fargo Bank
DLJ 2000-CKP1          11/07/2000   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CK1          03/16/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CK3          06/05/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CKN5         11/12/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CK6          12/11/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2002-CKP1         03/26/2002   Wells Fargo Bank       Wells Fargo Bank
CSFB 2002-CKN2         05/13/2002   Wells Fargo Bank       Wells Fargo Bank
SBMS 2002-Key2         09/26/2002   Wells Fargo Bank       Wells Fargo Bank
CSFB 2002-CKS4         10/29/2002   Wells Fargo Bank       Wells Fargo Bank
CSFB 2003-CK2          04/11/2003   Wells Fargo Bank       Wells Fargo Bank
CSFB 2003-C3           06/30/2003   Wells Fargo Bank       Wells Fargo Bank
CSFBCM 2003-C4         09/29/2003   Wells Fargo Bank       Wells Fargo Bank
MLMT 2003-KEY1         11/20/2003   LaSalle Bank           LaSalle Bank
CSFBCM 2003-05         12/05/2003   Wells Fargo Bank       Wells Fargo Bank
CSFBCM 2004-Cl         03/11/2004   Wells Fargo Bank       Wells Fargo Bank
MLMT 2004 MKB1         05/08/2004   Wells Fargo Bank       Wells Fargo Bank
CSFBCM 2004-C2         06/14/2004   Wells Fargo Bank       Wells Fargo Bank
MLMT 2004-KEY2         09/29/2004   LaSalle Bank           LaSalle Bank
CSFBMSC 2004-C3        08/25/2004   Wells Fargo Bank       Wells Fargo Bank
CSFBMSC 2004-C4        11/10/2004   Wells Fargo Bank       Wells Fargo Bank
CSFBMSC 2004-C5        12/20/2004   Wells Fargo Bank       Wells Fargo Bank
MLMT 2005 MKB2         03/29/2005   LaSalle Bank           LaSalle Bank
CSFBMSC 2005-C2        05/27/2005   Wells Fargo Bank       Wells Fargo Bank
CSFBMSC 2005-C4        08/25/2005   Wells Fargo Bank       Wells Fargo Bank
Bear Stearns 2000-WF1  02/01/2000   LaSalle Bank           LaSalle Bank
BOA 2001-1             06/01/2001   Wells Fargo Bank       Wells Fargo Bank
Salomon 2001-Cl        07/01/2001   Wells Fargo Bank       Wells Fargo Bank
GMAC CMC 98-M1         02/01/1998   FNMA                   FNMA
GMAC CMC 98-Cl         05/01/1998   LaSalle Bank           LaSalle Bank
GMAC CMC 98-C2         08/24/1998   LaSalle Bank           LaSalle Bank
BOA 2001-PB1           10/01/2001   LaSalle Bank           LaSalle Bank
BOA 2002-PB2           05/01/2002   Wells Fargo Bank       Wells Fargo Bank
BOA 2002-2             09/09/2002   LaSalle Bank           LaSalle Bank
JP Morgan 2002-CIBC5   11/04/2002   Wells Fargo Bank       Wells Fargo Bank
GECCMC 2002-3          12/01/2002   Wells Fargo Bank       Wells Fargo Bank
JP Morgan 2002-C3      12/23/2002   Wells Fargo Bank       Wells Fargo Bank
Wells 2003-TOP9        02/21/2003   LaSalle Bank           LaSalle Bank
CSFB 2003-CPN1         03/12/2003   Wells Fargo Bank       Wells Fargo Bank
GECCMC 2003-Cl         04/01/2003   Wells Fargo Bank       Wells Fargo Bank
BOA 2003-1             04/01/2003   LaSalle Bank           LaSalle Bank
Wells 2003-PWRI        02/21/2003   LaSalle Bank           LaSalle Bank
GE 2003-C2             08/01/2003   LaSalle Bank           LaSalle Bank
BACM 2003-2            11/01/2003   Wells Fargo Bank       Wells Fargo Bank
MSC 1995 GAL1          07/01/1995   LaSalle Bank           LaSalle Bank
MSC 1999-CAM1          07/01/1999   Chase Manhattan Bank   Chase Manhattan Bank
MSC 1998-HF1           03/01/1998   LaSalle Bank           LaSalle Bank
MSC 1998-WF2           06/01/1998   Wells Fargo Bank       Wells Fargo Bank
CMAC 1998 Cl           07/01/1998   LaSalle Bank           LaSalle Bank
MSC 1998-WF1           02/01/1999   LaSalle Bank           LaSalle Bank
MSC 1999-RM1           03/01/1999   LaSalle Bank           LaSalle Bank
SMA 1998-Cl            03/03/1998   State Street Bank      State Street Bank
CAMO2-02               04/03/2002   Chase Manhattan Bank   Chase Manhattan Bank





  EX-99.2 (a)
Management's Assertion on Compliance with Minimum Servicing Standards Set Forth
in the Uniform Single Attestation Program for Mortgage Bankers

Report of Management

We, as members of management of ARCap Servicing, Inc. (the Company), are
responsible for complying with the servicing standards identified in Attachment
A ("the minimum servicing standards") as set forth in the Mortgage Bankers
Association of America's Uniform Single Attestation Program for Mortgage Bankers
(USAP) except, for commercial loan and multifamily loan servicing, minimum
servicing standards V.4. and VI.1, which the Mortgage Bankers Association of
America has interpreted as inapplicable to such servicing. We are also
responsible for establishing and maintaining effective internal control over
compliance with these standards. We have performed an evaluation of the
Company's compliance with the minimum servicing standards as set forth in the
USAP as of December 31, 2005 and for the year then ended. Based on this
evaluation, we assert that during the year ended December 31, 2005, the Company
complied, in all material respects, with the minimum servicing standards set
forth in the USAP.

As of and for this same period, the Company had in effect a fidelity bond
(crime) policy in the amount of $10,000,000 aggregate, $5,000,000 per loss and
an errors and omissions policy in the amount of $10,000,000.



/s/ Christopher Crouch
Christopher Crouch, Servicing Officer
of ARCap Servicing, Inc.

February 16, 2006

[PAGE]

Attachment A

Minimum Servicing Standards


I.   Mortgage Principal, Interest and Amortization

1.   Reconciliations shall be prepared on a monthly basis for all custodial bank
     accounts and related bank clearing accounts. These reconciliations shall:
       *  be mathematically accurate;
       *  be prepared within forty-five (45) calendar days after the cutoff date
       *  be reviewed and approved by someone other than the person who prepared
          the reconciliation; and
       *  document explanations for reconciling items. These reconciling items
          shall be resolved within ninety (90) calendar days of their original
          identification.

2.   Funds of the servicing entity shall be advanced in cases where there is an
     overdraft in an investor's or a mortgagor's account.

3.   Each custodial account shall be maintained at a federally insured
     depository institution in trust for the applicable investor.

4.   Escrow funds held in trust for a mortgagor shall be returned to the
     mortgagor within thirty (30) calendar days of payoff of the mortgage loan.

II.  Mortgage Payments

1.   Mortgage payments shall be deposited into the custodial bank accounts and
     related bank clearing accounts within two business days of receipt.

2.   Mortgage payments made in accordance with the mortgagor's loan documents
     shall be posted to the applicable mortgagor records within two business
     days of receipt.

3.   Mortgage payments shall be allocated to principal, interest, insurance,
     taxes or other escrow items in accordance with the mortgagor's loan
     documents.

4.   Mortgage payments identified as loan payoffs shall be allocated in
     accordance with the mortgagor's loan documents.


III. Disbursements

1.   Disbursements made via wire transfer on behalf of a mortgagor or investor
     shall be made only by authorized personnel.

[PAGE]

2.   Disbursements made on behalf of a mortgagor or investor shall be posted
     within two business days to the mortgagor's or investor's records
     maintained by the servicing entity.

3.   Tax and insurance payments shall be made on or before the penalty or
     insurance policy expiration dates, as indicated on tax bills and insurance
     premium notices, respectively, provided that such support has been received
     by the servicing entity at least thirty (30) calendar days prior to these
     dates.

4.   Any late payment penalties paid in conjunction with the payment of any tax
     bill or insurance premium notice shall be paid from the servicing entity's
     funds and not charged to the mortgagor, unless the late payment was due to
     the mortgagor's error or omission.

5.   Amounts remitted to investors per the servicer's investor reports shall
     agree with canceled checks or other form of payment, or custodial bank
     statements.

6.   Unissued checks shall be safeguarded so as to prevent unauthorized access.

IV.  Investor Accounting and Reporting

1.   The servicing entity's investor reports shall agree with, or reconcile to,
     investors' records on a monthly basis as to the total unpaid principal
     balance and number of loans serviced by the servicing entity.

V. Mortgage Loan Accounting

1.   The servicing entity's mortgage loan records shall agree with, or reconcile
     to, the records of mortgagors with respect to the unpaid principal balance
     on a monthly basis.

2.   Adjustments on ARM loans shall be computed based on the related mortgage
     note and any ARM rider.

3.   Escrow accounts shall be analyzed, in accordance with the mortgagor's loan
     documents, on at least an annual basis.

4.   Interest on escrow accounts shall be paid, or credited, to mortgagors in
     accordance with the applicable state laws.

VI.  Delinquencies

1.   Records documenting collection efforts shall maintained during the period
     a loan is in default and shall be updated at least monthly. Such records
     shall describe the entity's activities in monitoring delinquent loans
     including, for example, phone calls, letters and mortgage payment
     rescheduling plans in cases where the delinquency is deemed temporary
     (e.g., illness or unemployment).

[PAGE]

VII. Insurance Policies

1.   A fidelity bond and errors and omissions policy shall be in effect on the
     servicing entity throughout the reporting period in the amount of coverage
     represented to investors in management's assertion.





  EX-99.2 (b)
(logo) KeyBank
Real Estate Capital

Management's Assertion on Compliance
with the Specified Minimum Servicing Standards

Report of Management

We, as members of management of KeyCorp Real Estate Capital Markets, Inc (the
Company), are responsible for complying with the servicing standards identified
in the attached Exhibit A (the "specified minimum servicing standards"). We are
also responsible for establishing and maintaining effective internal control
over compliance with these specified minimum servicing standards. We have
performed an evaluation of the Company's compliance with the specified minimum
servicing standards as of December 31, 2005 and for the year then ended. Based
on this evaluation, we assert that during the year ended December 31, 2005, the
Company complied, in all material respects, with the specified minimum servicing
standards.

As of December 31, 2005 and for the year then ended, the Company had in effect a
fidelity bond in the amount of $100,000,000 and an errors and omissions policy
in the amount of $100,000,000.


/s/ Marty O'Conner
Marty O'Conner
Senior Vice President
Loan Servicing & Asset Management

/s/ Tony Nemec
Tony Nemec
Vice President, Investory Reporting
and Surveillance

/s/ Bryan Nitcher
Bryan Nitcher
Vice President, Portfolio Management


Kansas City, Missouri
January 20, 2006


(Page)

Exhibit A




Exhibit A

Specified Minimum Servicing Standards

Management of the Company identified the following minimum servicing standards
which are based on the servicing standards set forth in the Mortgage Bankers
Association of America's Uniform Single Attestation Program for Mortgage
Bankers, (USAP) and, in management's opinion, are applicable to servicing
commercial mortgage loans and satisfy the requirements of the underlying
servicing agreements.

I. Custodial Bank Accounts

1. Reconciliations shall be prepared on a monthly basis for all custodial bank
   accounts and related bank clearing accounts. These reconciliations shall:
     * be mathematically accurate;
     * be prepared within forty-five (45) after the cutoff date;
     * be reviewed and approved by someone other than the person who prepared
       the reconciliation; and
     * document explanations for reconciling items. These reconciling items
       shall be resolved within ninety (90) calendar days of their original
       identification.

2. Funds of the servicing entity shall be advanced in cases where there is an
overdraft in an investor's or a mortgagor's account.

3. Each custodial account shall be maintained at a federally insured depository
   institution in trust for the applicable investor.

4. Escrow funds held in trust for a mortgagor shall be returned to the mortgagor
within thirty (30) calendar days of payoff of the mortgage loan.

II. Mortgage Payments

1. Mortgage payments shall be deposited into the custodial bank accounts and
related bank clearing accounts within two business days of receipts.

2. Mortgage payments made in accordance with the mortgagor's loan documents
shall be posted to the applicable mortgagor records within two business days of
receipt.

3. Mortgage payments shall be allocated to principal, interest, insurance, taxes
or other escrow items in accordance with the mortgagor's loan documents.

4. Mortgage payments identified as loan payoffs shall be allocated in accordance
with the mortgagor's loan documents.


Page 2

(PAGE)


Exhibit A



III. Disbursements

1. Disbursements made via wire transfer on behalf of a mortgagor or investor
   shall be made only by authorized personnel.

2. Disbursements made on behalf of a mortgagor or investor shall be posted
   within two business days to the mortgagor's or investor's records maintained
   by the servicing entity.

3. Tax and insurance payments shall be made on or before the penalty or
   insurance policy expiration dates, as indicated on tax bills and insurance
   premium notices, respectively, provided that such support has been received
   by the servicing entity at least thirty (30) calendar days prior to these
   dates.

4. Any late payment penalties paid in conjunction with the payment of any tax
   bill or insurance premium notice shall be paid from the servicing entity's
   funds and not charged to the mortgagor, unless the late payment was due to
   the mortgagor's error or omission.

5. Amounts remitted to investors per the servicer's investor reports shall agree
   with canceled checks or other form of payment, or custodial bank statements.

6. Unissued checks shall be safeguarded so as to prevent unauthorized access.

IV. Investor Accounting and Reporting

1. The servicing entity's investor reports shall agree with, or reconcile to,
   investors' records on a monthly basis as to the total unpaid principal
   balance and number of loans serviced by the servicing entity.

V. Mortgage Loan Accounting

1. The servicing entity's mortgage loan records shall agree with, or reconcile
   to, the records of mortgagors with respect to the unpaid principal balance on
   a monthly basis.

2. Adjustments on ARM loans shall be computed based on the related mortgage note
   and any ARM rider.

3. Escrow accounts shall be analyzed, in accordance with the mortgagor's loan
   documents, on at least an annual basis.






Page 3

(PAGE)


Exhibit A



VI. Insurance Policies

1. A fidelity bond and errors and omissions policy shall be in effect on the
servicing entity throughout the reporting period in the amount of coverage
represented to investors in management's assertion




Page 2

(PAGE)


Exhibit A

Specified Minimum Servicing Standards (continued)
Securitization Trusts

(for informational purposes only)
Commercial mortgage loans owned by the following trusts serviced by the Company
during the year ended December 31, 2005:

                       Sale &Svcg
Pool Name              Agree Dt     Indenture Trustee      Owner Trustee
MCF 1998-MC1           05/29/1998   LaSalle Bank           LaSalle Bank
MCF 1998-MC3           12/31/1998   LaSalle Bank           LaSalle Bank
JPMCC 2005-LDP4        09/27/2005   Wells Fargo Bank       Wells Fargo Bank
MLMT 2005 CK11         12/07/2005   LaSalle Bank           LaSalle Bank
CSFBMSC 2005-C6        12/28/2005   Wells Fargo Bank       Wells Fargo Bank
PSSFC 1998 C-1         08/21/1998   Chase Manhattan Bank   Chase Manhattan Bank
CSFB 2002-CP3          07/01/2002   LaSalle Bank           LaSalle Bank
PSSFC 1999 NRF-1       03/25/1999   Chase Manhattan Bank   Chase Manhattan Bank
CSFB 2002 CP5          12/01/2002   Wells Fargo Bank       Wells Fargo Bank
CBA MEZZ 2004 Cl       02/23/2004   Wells Fargo Bank       Wells Fargo Bank
PSSFC 1999 C-2         07/28/1999   Chase Manhattan Bank   Chase Manhattan Bank
CSFBMSC 2004-CBN1      10/21/2004   Wells Fargo Bank       Wells Fargo Bank
BACM 2005-3            07/13/2005   LaSalle Bank           LaSalle Bank
KEY 2000-Cl            06/29/2000   Chase Manhattan Bank   Chase Manhattan Bank
BACM 2005-5            10/13/2005   LaSalle Bank           LaSalle Bank
BALL 2005-MIB1         11/29/2005   Wells Fargo Bank       Wells Fargo Bank
CSFB 2005 OMA          12/22/2005   Wells Fargo Bank       Wells Fargo Bank
DLJ 2000-CKP1          11/07/2000   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CK1          03/16/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CK3          06/05/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CKN5         11/12/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2001-CK6          12/11/2001   Wells Fargo Bank       Wells Fargo Bank
CSFB 2002-CKP1         03/26/2002   Wells Fargo Bank       Wells Fargo Bank
CSFB 2002-CKN2         05/13/2002   Wells Fargo Bank       Wells Fargo Bank
SBMS 2002-Key2         09/26/2002   Wells Fargo Bank       Wells Fargo Bank
CSFB 2002-CKS4         10/29/2002   Wells Fargo Bank       Wells Fargo Bank
CSFB 2003-CK2          04/11/2003   Wells Fargo Bank       Wells Fargo Bank
CSFB 2003-C3           06/30/2003   Wells Fargo Bank       Wells Fargo Bank
CSFBCM 2003-C4         09/29/2003   Wells Fargo Bank       Wells Fargo Bank
MLMT 2003-KEY1         11/20/2003   LaSalle Bank           LaSalle Bank
CSFBCM 2003-05         12/05/2003   Wells Fargo Bank       Wells Fargo Bank
CSFBCM 2004-Cl         03/11/2004   Wells Fargo Bank       Wells Fargo Bank
MLMT 2004 MKB1         05/08/2004   Wells Fargo Bank       Wells Fargo Bank
CSFBCM 2004-C2         06/14/2004   Wells Fargo Bank       Wells Fargo Bank
MLMT 2004-KEY2         09/29/2004   LaSalle Bank           LaSalle Bank
CSFBMSC 2004-C3        08/25/2004   Wells Fargo Bank       Wells Fargo Bank
CSFBMSC 2004-C4        11/10/2004   Wells Fargo Bank       Wells Fargo Bank
CSFBMSC 2004-C5        12/20/2004   Wells Fargo Bank       Wells Fargo Bank
MLMT 2005 MKB2         03/29/2005   LaSalle Bank           LaSalle Bank
CSFBMSC 2005-C2        05/27/2005   Wells Fargo Bank       Wells Fargo Bank
CSFBMSC 2005-C4        08/25/2005   Wells Fargo Bank       Wells Fargo Bank
Bear Stearns 2000-WF1  02/01/2000   LaSalle Bank           LaSalle Bank
BOA 2001-1             06/01/2001   Wells Fargo Bank       Wells Fargo Bank
Salomon 2001-Cl        07/01/2001   Wells Fargo Bank       Wells Fargo Bank
GMAC CMC 98-M1         02/01/1998   FNMA                   FNMA
GMAC CMC 98-Cl         05/01/1998   LaSalle Bank           LaSalle Bank
GMAC CMC 98-C2         08/24/1998   LaSalle Bank           LaSalle Bank
BOA 2001-PB1           10/01/2001   LaSalle Bank           LaSalle Bank
BOA 2002-PB2           05/01/2002   Wells Fargo Bank       Wells Fargo Bank
BOA 2002-2             09/09/2002   LaSalle Bank           LaSalle Bank
JP Morgan 2002-CIBC5   11/04/2002   Wells Fargo Bank       Wells Fargo Bank
GECCMC 2002-3          12/01/2002   Wells Fargo Bank       Wells Fargo Bank
JP Morgan 2002-C3      12/23/2002   Wells Fargo Bank       Wells Fargo Bank
Wells 2003-TOP9        02/21/2003   LaSalle Bank           LaSalle Bank
CSFB 2003-CPN1         03/12/2003   Wells Fargo Bank       Wells Fargo Bank
GECCMC 2003-Cl         04/01/2003   Wells Fargo Bank       Wells Fargo Bank
BOA 2003-1             04/01/2003   LaSalle Bank           LaSalle Bank
Wells 2003-PWRI        02/21/2003   LaSalle Bank           LaSalle Bank
GE 2003-C2             08/01/2003   LaSalle Bank           LaSalle Bank
BACM 2003-2            11/01/2003   Wells Fargo Bank       Wells Fargo Bank
MSC 1995 GAL1          07/01/1995   LaSalle Bank           LaSalle Bank
MSC 1999-CAM1          07/01/1999   Chase Manhattan Bank   Chase Manhattan Bank
MSC 1998-HF1           03/01/1998   LaSalle Bank           LaSalle Bank
MSC 1998-WF2           06/01/1998   Wells Fargo Bank       Wells Fargo Bank
CMAC 1998 Cl           07/01/1998   LaSalle Bank           LaSalle Bank
MSC 1998-WF1           02/01/1999   LaSalle Bank           LaSalle Bank
MSC 1999-RM1           03/01/1999   LaSalle Bank           LaSalle Bank
SMA 1998-Cl            03/03/1998   State Street Bank      State Street Bank
CAMO2-02               04/03/2002   Chase Manhattan Bank   Chase Manhattan Bank





  EX-99.3 (a)
OFFICER'S CERTIFICATE
ARCap SERVICING, INC.

The undersigned, James L. Duggins, the President of ARCap Servicing, Inc., the
Special Servicer under that certain Pooling and Servicing Agreement (the
"Pooling and Servicing Agreement") dated as of August 1, 2005, relating to the
Credit Suisse First Boston Mortgage Securities Corp., Commercial Mortgage
Pass-Through Certificates, Series 2005-C4, hereby certifies as follows:

1. A review of the activities of the Special Servicer during the calendar year
   2005 and of its performance under the Pooling and Servicing Agreement has
   been made under the undersigned's supervision;

2. To the best of the undersigned's knowledge, based on such review, the Special
   Servicer has fulfilled all its obligations under the Pooling and Servicing
   Agreement in all material respects throughout the calendar year 2005; and

3. Special Servicer has received no notice regarding the qualification, or
   challenging the status, of either REMIC Pool as a REMIC or Grantor Trust V
   as a Grantor Trust from the IRS or any other governmental agency or body.

Capitalized terms not otherwise defined herein shall have the meanings given
them in the Pooling and Servicing Agreement.

IN WITNESS WHEREOF, as of the 23rd day of March, 2006, I have hereunto
signed my name.

ARCap SERVICING, INC.,
a Delaware corporation

BY: /s/ James L. Duggins
    James L. Duggins, President




  EX-99.3 (b)
(logo) KeyBank
Real Estate Capital


911 Main Street, Suite 1500
Kansas City, MO 64105
Tel: 816-221-8800
Fax: 816-221-8051
Toll Free: 888-979-1200

March 7, 2006


KeyCorp Real Estate Capital Markets, Inc.
As Master Servicer
Annual Officer's Certification
For Period of: August 1 through December 31, 2005


Re: CSFB 2005-C4 Pooling and Servicing Agreement


With regard to the loans Master Serviced by KeyCorp Real Estate Capital Markets,
Inc. d/b/a/ KeyBank Real Estate Capital (KBREC) in the above captioned
transaction, and pursuant to Section 3.13 of the Pooling and Servicing
Agreement, please be advised of the following:


  * A review of the activities of KBREC during the above stated period and of
    its performance, under the Agreement, has been made under my supervision.

  * To the best of my knowledge, based on such review, KBREC has fulfilled all
    of its obligations under the Agreement in all material respects.

  * KBREC has received no notice regarding qualification or challenge to the
    status of either REMIC Pool as a REMIC or Grantor Trust V as a Grantor Trust
    from the Internal Revenue Service or any governing agency or body.



By:
/s/ Bryan S. Nitcher

Bryan S. Nitcher
Senior Vice President

Date:
/s/ 3-8-06






#750





  Ex-99.4

   Schedule of Year-To-Date Principal and Interest Distributions to
   Certificateholders


   <TABLE>

   Class                              Interest             Principal               Losses             Ending Balance
   
                       <c>                    <c>                  <c>                 <c>
   A-1                              610,077.73          1,816,638.67                 0.00              37,183,361.33
   A-1-A                          6,336,643.67            575,842.72                 0.00             371,940,157.28
   A-2                            2,307,820.00                  0.00                 0.00             138,000,000.00
   A-3                            1,501,866.68                  0.00                 0.00              88,000,000.00
   A-4                              426,750.00                  0.00                 0.00              25,000,000.00
   A-5                            5,291,146.68                  0.00                 0.00             311,000,000.00
   A-5M                             764,116.68                  0.00                 0.00              44,434,000.00
   A-AB                             759,750.00                  0.00                 0.00              45,000,000.00
   A-J                            1,609,038.40                  0.00                 0.00              93,008,000.00
   A-SP                           1,392,573.93                  0.00                 0.00           1,185,652,000.00
   A-X                              240,500.10                  0.00                 0.00           1,326,295,969.61
   B                                410,027.92                  0.00                 0.00              23,253,000.00
   C                                235,206.48                  0.00                 0.00              13,286,000.00
   D                                417,295.88                  0.00                 0.00              23,252,000.00
   E                                303,518.15                  0.00                 0.00              16,609,000.00
   F                                303,518.15                  0.00                 0.00              16,609,000.00
   G                                242,810.87                  0.00                 0.00              13,287,000.00
   H                                303,499.89                  0.00                 0.00              16,608,000.00
   J                                 80,890.68                  0.00                 0.00               4,983,000.00
   K                                134,801.60                  0.00                 0.00               8,304,000.00
   L                                107,838.04                  0.00                 0.00               6,643,000.00
   M                                 26,963.56                  0.00                 0.00               1,661,000.00
   N                                 80,890.68                  0.00                 0.00               4,983,000.00
   O                                 80,874.48                  0.00                 0.00               4,982,000.00
   P                                296,567.44                  0.00                 0.00              18,270,451.00

   </TABLE>