Home · 2020 Mercedes-benz S-class Phev · Complaints

What 7 owners told NHTSA about the 2020 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 (7)Speed control (2)Visibility & wipers (2)Electronic Stability Control (esc) (1)Engine (1)Fuel system (1)Steering (1)

1 of 7 complaints match · Fuel system · clear filters

Oct 17, 2025Fuel system

The fuel pump My car stopped on the highway [XXX] on [XXX] with my children in the car with no warning at all. I was so lucky nobody hit us and it took 20 minutes of trying to start it to get off of the highway to a gas station where it cut off again The dealer said it is a known problem however my vin number was included despite the fact that they know that the 2020 mercedes benz s450 has an issue that should be recalled due to the severity of the situation and safety of the public. Warning lights did not come on until the car totally stopped. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11694134

Working with the data? Download all 7 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 2020 Mercedes-benz S-class Phev verdict →