Home · 2011 Mercedes-benz S-class Phev · Complaints

What 18 owners told NHTSA about the 2011 Mercedes-benz S-class Phev

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (18)Crash / fire / injury (3)Fuel system (6)Electrical system (4)Engine (4)Suspension (2)Body & structure (1)Brakes (1)Hybrid Propulsion System (1)Speed control (1)Wheels (1)

3 of 18 complaints match · crash/fire/injury only · clear filters

Aug 22, 2018EngineFire

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.

NHTSA ODI 11121753

Jun 29, 2017Crash

SHIFTING LEVER IS UP FOR REVERSE, CENTER FOR PARK, DOWN FOR FORWARD. ALL OTHER TRANSMISSIONS YOU PUSH UP FOR PARK. AFTER DRIVING ALL OTHER CARS, EVEN PRIOR MERCEDES IF YOU EXIT THE CAR YOU PUSH THE TRANSMISSION LEVER TO UP FOR PARK EVEN WITH THE ENGINE RUNNING YOU PUSH THE LEVER UP FOR PARK. THIS BECOMES A HABIT, A REFLEXIVE ACTION BUT IF YOU DO THIS IN THIS MERCEDES YOU GO INTO REVERSE. WHAT HAPPENED TO ME IS I STARTED THE CAR IN MY GARAGE AND FORGOT SOMETHING SO I HOPPED OUT WHILE REACHING FOR THE SHIFT LEVER AND PUSHED UP FOR PARK, BUT IT WASN'T PARK, IT WAS REVERSE AND MY CAR STARTED BACKWARD WITH ME ONLY PARTIALLY IN THE CAR. I BARELY MADE IT BACK IN BEFORE I WIPED OUT MY DRIVERS DOOR ON THE GARAGE WALL AS THE CAR EXITED THE GARAGE. I CAME WITHIN A WHISPER OF GETTING SMASHED BETWEEN THE CAR DOOR AND THE GARAGE. DAMAGE, ABOUT $7,000 BUT I AVOIDED GETTING KILLED. NOW, YOU MAY SAY THAT IT IS MY FAULT FOR NOT SHIFTING PROPERLY BUT WHY WOULD MERCEDES GO AWAY FROM WHAT HAS BEEN THE PRACTICE FOR MANY, MANY YEARS? MUCH OF DRIVING IS DOING WHAT YOU HAVE BEEN CONDITIONED TO DO, MUCH OF IT IS REFLEXIVE AND THAT SHOULD BE CONSIDERED IN DESIGN FOR SAFETY. I WROTE TO MERCEDES ABOUT THIS AND TOLD THEM THAT THIS IS A SAFETY ISSUE. I ASKED THEM FOR REIMBURSEMENT FOR MY REPAIR BUT I DON'T EXPECT THEY WILL COMPLY.

NHTSA ODI 11002352

Dec 29, 2016Electrical systemEngineFire

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ S63. WHILE THE VEHICLE WAS PARKED, THE CONTACT WAS INFORMED THAT THE VEHICLE WAS ON FIRE. THE CONTACT STATED THAT THE FIRE ORIGINATED FROM THE FRONT OF THE VEHICLE. THE FIRE DEPARTMENT EXTINGUISHED THE FIRE AND A FIRE REPORT WAS FILED. THE VEHICLE WAS TOWED TO AN AUTHORIZED MERCEDES BENZ DEALER. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 90,000. ...UPDATED 03/13/17 *BF UPDATED 08/17/2017*JS

NHTSA ODI 10938438

Working with the data? Download all 18 complaints as CSV · fetched from NHTSA July 21, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2011 Mercedes-benz S-class Phev verdict →