AI DamageMercedes-Benz ML400: problems, complaints, bulletins
Summary for the Mercedes-Benz ML400 across 1 model years: 4 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
| Year | Owner complaints | involving a crash | Technical service bulletins (TSB) | YouTube repair videos |
|---|---|---|---|---|
| 2015 | 4 | 1 | 0 | 0 |
What fails most often
- 1 Engine 25% of all complaints
- 2 Fuel system 25% of all complaints
- 3 Powertrain 25% of all complaints
- 4 Service brakes 25% of all complaints
- 5 Steering 25% of all complaints
- Engine: 1 complaints (25% of all).
- Fuel system: 1 complaints (25% of all).
- Powertrain: 1 complaints (25% of all).
- Service brakes: 1 complaints (25% of all), 1 of them with a crash reported by the owner.
- Steering: 1 complaints (25% of all), 1 of them with a crash reported by the owner.
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 1 | 0 | 0 |
| Fuel system | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
| Service brakes | 1 | 1 | 0 |
| Steering | 1 | 1 | 0 |
| Other | 2 | 1 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
I believe with my heart and soul my beautiful wife was killed due to failure of vehicle in motion and lost all control.
The contact stated while driving 45 MPH, the vehicle lost motive power without warning. The vehicle was towed to the residence. The dealer was contacted and stated the vehicle was not included in NHTSA Campaign Number: 22V955000 (Fuel System, Diesel, Fuel System, Gasoline). The vehicle was not diagnosed.
The cam shaft adjuster failed, causing a loss of power in the engine. Vehicle could not maintain speed on hills or merge onto interstates in this condition.
This new mercedes-benz ml400 has a manual transmission feature that without reason reverts back to automatic within about 10 seconds without any reason. This prevents the driver from being able to control traction in slippery or other difficult conditions, which clearly was our experience.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.