Rule13a-14(d)/15d-14(d) Certifications.

 

I, Patrick A. Remmert Jr.,certify that:

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| 1.     | I have reviewed this report  on Form 10-K and all reports on Form 10-D required to be filed in respect of  the period covered by this report on Form 10-K of the CSAIL 2015-C4  Commercial Mortgage Trust (the "Exchange Act periodic reports");                                                                                                                                                                                                                                                                                                                      |
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| 2.     | Based on my knowledge, the  Exchange Act periodic reports, taken as a whole, do 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 with respect to the period covered by  this report;                                                                                                                                                                                                                          |
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| 3.     | Based on my knowledge, all  of the distribution, servicing and other information required to be provided  under Form 10-D for the period covered by this report is included in the  Exchange Act periodic reports;                                                                                                                                                                                                                                                                                                                                                              |
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| 4.     | Based on my knowledge and  the servicer compliance statements required in this report under Item 1123 of  Regulation AB, and except as disclosed in the Exchange Act periodic reports,  the servicers have fulfilled their obligations under the servicing agreements  in all material respects; and                                                                                                                                                                                                                                                                            |
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| 5.     | All of the reports on assessment  of compliance with servicing criteria for asset-backed securities and their  related attestation reports on assessment of compliance with servicing  criteria for asset-backed securities required to be included in this report  in accordance with Item 1122 of Regulation AB and Exchange Act Rules 13a-18  and 15d-18 have been included as an exhibit to this report, except as  otherwise disclosed in this report. Any material instances of noncompliance  described in such reports have been disclosed in this report on Form 10-K. |
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In giving the certificationsabove, I have reasonably relied on information provided to me by the followingunaffiliated parties:Wells Fargo Bank, National Association, as Master Servicer, Midland Loan Services,a Division of PNC Bank, National Association, as Special Servicer, WilmingtonTrust, National Association, as Trustee, Wells Fargo Bank, NationalAssociation, as Certificate Administrator, Wells Fargo Bank, NationalAssociation, as Custodian, Pentalpha Surveillance LLC, as Operating Advisor,CoreLogic Commercial Real Estate Services, Inc., as Servicing FunctionParticipant, National Tax Search, LLC, as Servicing Function Participant,Midland Loan Services, a Division of PNC Bank, National Association, as PrimaryServicer for the Arizona Grand Resort & Spa Mortgage Loan, Rialto CapitalAdvisors, LLC, as Special Servicer for the Arizona Grand Resort & SpaMortgage Loan, Wells Fargo Bank, National Association, as Trustee andCertificate Administrator for the Arizona Grand Resort & Spa Mortgage Loan,Wells Fargo Bank, National Association, as Custodian for the Arizona GrandResort & Spa Mortgage Loan, and Pentalpha Surveillance LLC, as OperatingAdvisor for the Arizona Grand Resort & Spa Mortgage Loan.

 

Dated: March 21, 2017

 

/s/Patrick A. Remmert Jr.

President

(senior officer in charge ofsecuritization of the depositor)