AI Damage2015 Mercedes-Benz ML400: common problems
Owners of the 2015 Mercedes-Benz ML400 filed 4 complaints with NHTSA, most often about engine and fuel system. Details by component below, with sources.
Key figures
- Owner complaints
- 4
- involving a crash
- 1
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.
Comparison
By complaint count this model year ranks 15,524 of 36,659 model years in the NHTSA data (top 42% most complained about).
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.
Questions and answers
What are the most common problems with the 2015 Mercedes-Benz ML400?
Owner complaints to NHTSA most often mention: engine, fuel system, powertrain. Total complaints: 4. The most frequent symptoms in complaint texts: loss of power / limp mode (50%).
How many service bulletins (TSB) were issued for the 2015 Mercedes-Benz ML400?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2015 Mercedes-Benz ML400 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2015 models
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.