There are 2 owner-reported engine complaints for the 2011 Mercedes-Benz S-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ S550. THE CONTACT STATED THAT THE VEHICLE CAUGHT ON FIRE WHILE PARKED. THE CONTACT WAS ABLE TO EXTINGUISH THE FIRE WHICH STARTED FROM UNDERNEATH THE VEHICLE. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHO DETERMINED THAT THE ENGINE HARNESS LEADING TO THE OXYGEN SENSOR WAS THE CAUSE OF THE FIRE. THE VEHICLE WAS NOT REPAIRED. THE VEHICLE WAS TOWED TO HOUSE OF IMPORTS (6862 AUTO CENTER DR, BUENA PARK, CA 90621, (714) 627-5553) FOR DIAGNOSTIC TESTING OVER A MONTH AGO WHERE IT WAS STILL AWAITING A DIAGNOSIS. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND A CASE MANGER WAS ASSIGNED. THE CONTACT SENT PICTURES OF THE VEHICLE AND FAILED PARTS TO THE MANUFACTURER. THE FAILURE MILEAGE WAS APPROXIMATELY 118,000.
TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ S400. THE CONTACT STATED THAT THE VEHICLE FAILED TO START INTERMITTENTLY. THE HYBRID BATTERY WARNING LIGHT WAS ILLUMINATED. THE CONTACT STATED THAT THE INTERIOR LIGHTS WERE INOPERABLE. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF TAMPA (4400 N DALE MABRY HWY, TAMPA, FL 33614, (813)543-8419) TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE POWER ELECTRONIC MODULE FOR THE HYBRID SYSTEM FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 18,000.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026