You can sue the auto shop for negligence.  Negligence is the failure to exercise due care (that degree of care that a reasonable auto shop would have exercised under the same or similar circumstances to prevent foreseeable harm).  The employer is liable for the negligence of the employee (technician) who repaired/installed the sunroof.Your damages (monetary compensation you are seeking in your lawsuit) are the cost of repairs / replacement of the sunroof including the parts.You can file your lawsuit in small claims court.  Upon prevailing in the case, you can recover court costs which include the court filing fee and process server fee.