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What 29 owners told NHTSA about the 2018 Mercedes-benz S-class Hybrid

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 (29)Crash / fire / injury (3)Engine (7)Brakes (5)Steering (5)Driver assistance (3)Fuel system (3)Suspension (3)Transmission & drivetrain (2)Airbags (1)Communication (1)Electrical system (1)

5 of 29 complaints match · Steering · clear filters

Nov 10, 2025SteeringSuspensionBrakesCrash

Vehicle had a low tire, vehicle indicated it needed to be driven for recalibration of the sensor(s). Took vehicle for short drive up two lane road. Turned around and headed back to where was staying and upon acceleration the vehicle seemed to have pulled off the road but come to find out it didn't at all go off the right side of the roadway. The vehicle sort of jerked and went to the left, causing me to travel over the opposite lane and into the ditch on opposite side of the road, then when pulling out of the ditch the vehicle flipped and overturned skidding on it's top side along the roadway. There was a vehicle coming, they were able to slow but were still impacted by the car as it traveled on it's roof. The vehicle finally came to a stop. After exiting the vehicle, being able to ensure everyone was ok, it was clear the lower control arm on the driver's side was broken in half and that was what had caused the "jerking" and when it seemed like vehicle initially had gone off the right side of the road when it hadn't at all-it was a mechanical malfunction.

NHTSA ODI 11698526

Aug 19, 2024SteeringEngine

The engine failed while my friend was driving. The car is available for inspection. My friend almost got into a car accident because the car started shaking and the steering wheel closed up before the engine completely failed. Additionally, the airbags did not go off. It could've been a fatal accident because he was driving on the highway. The problem was confirmed by an independent service center. The vehicle has been inspected by a certified mechanic. The car has had problems since I bought it. The tire pressure would always go down. The steering wheel and car would shake at times, and the tires had to be replaced two times within two years.

NHTSA ODI 11609520

May 29, 2023Steering

Steering wheel became extremely stiff to turn and a message that read “steering malfunction increase physical effort” appeared while driving at around 30 mph while in a vacation trip, not only was this extremely unsettling since it happened suddenly but I had to act fast to avoid a collision with other vehicles, once I made it to a safe location I shut the vehicle off and restarted after 15 minutes and it seem drivable again but left me extremely concerned as I am 500 miles away from with no dealerships open to have it looked since is Memorial Day.

NHTSA ODI 11524278

Jul 8, 2019Steering

2018 MERCEDES BENZ S CLASS. CONSUMER WRITES IN REGARDS TO NHTSA RECALL 18V-910. *LD *JS

NHTSA ODI 11229256

Apr 29, 2019Steering

THERE ARE 2 ACTIVE RECALLS SINCE PAST 4 MONTHS AND THERE IS NO REMEDY YET. I HAVE CONTACTED THE DEALER TO FIX THE ISSUE AND THEY ARE TELLING ME THAT THE REMEDY HAS NOT BEEN MADE YET.

NHTSA ODI 11204316

Working with the data? Download all 29 complaints as CSV · fetched from NHTSA July 14, 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 2018 Mercedes-benz S-class Hybrid verdict →