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)

1 of 18 complaints match · Body & structure · clear filters

Sep 23, 2020Body & structure

IABOUT 2 MONTHS AGO, I WAS UNABLE TO START MY CAR. IT HAD A WARNING MESSAGE 'SERVICES REQUIRED. DO NOT SHIFT THE GEAR'. WE TOWED OUR CAR TO THE DEALER AND LEARNED THAT THE BACKSEAT FLOOD HAD STANDING WATER! THIS CAUSED THE ELECTRONIC SHORTAGE. WE PAID OVER $2000 TO MAKE THE CAR RUNNING AGAIN. IT LOOKS THAT THE RAIN GOT IN THROUGH DRIVER SIDE BACK WINDOW BECAUSE OF THE SEALING PROBLEMS. IT RAINED LAST NIGHT. I JUST LOOKED AT MY CAR. THE BACK FLOOR LIKES RIVER AGAIN. I AM UNABLE TO START THE CAR AGAIN. NOW WE FEEL THAT THIS CAR IS VERY UNSAFE. WE DO NOT KNOW WHEN THE RAIN WILL GET INTO THE CAR TO CAUSE THE ELECTRONIC PROBLEMS. WE ARE AFRAID THAT WE MAY BE TRAPPED IN A FLOOD IF WE DRIVE IT IN THE RAIN' WE CONTACTED THE DEALER LAST MONTH TO ASK THEM TO RECALL THIS CAR AND FIND THE REASON FOR THIS LEAKING. THEY TOLD US TO PAY ALL THE COSTS. WE DID NOT ACCEPT BECAUSE THIS IS OBVIOUSLY A MANUFACTURE DEFECT! WE ARE SEEKING YOUR HELP TO SOLVE THIS ISSUE BECAUSE THIS LEAKING MAY CAUSE MANY ELECTRIC PROBLEMS THAT HAS MAKE THIS CAR UNABLE TO DRIVE. I ATTACHED THE EMAIL COMMUNICATIONS WITH THE DEALER IN CASE THAT YOU MAY NEED THEM. THANK YOU AND I AM LOOKING FORWARD TO HEARING BACK FROM YOU SOON!

NHTSA ODI 11360693

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 →