Total Complaints
8 filings
MERCEDES-BENZ ML400 · model year
2015 MERCEDES-BENZ ML400
8 NHTSA complaints, 3 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2015MERCEDES-BENZML400 carries 8 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 3 crashes, 0 fires, 0 injuries, and 3 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2015 ML400 is unknown or other with 2 filings, followed by power train (1) and service brakes (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 15 investigation files overlapping the 2015 ML400. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
8
Complaints
3
Crashes
0
Fires
0
Injuries
3
Deaths
Crashes Reported
3 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| UNKNOWN OR OTHER | 2 |
| POWER TRAIN | 1 |
| SERVICE BRAKES | 1 |
| STEERING | 1 |
| ENGINE | 1 |
| FUEL SYSTEM, DIESEL | 1 |
| FUEL SYSTEM, GASOLINE | 1 |
Recent Complaints
20230822FUEL SYSTEM, DIESEL
The contact owns a 2015 Mercedes-Benz ML400. 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 vehicle was not repaired. The manufacturer was contacted and stated that the VIN was not included in the recall. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was 79,000.
Mileage: 79,000
20230822FUEL SYSTEM, GASOLINE
The contact owns a 2015 Mercedes-Benz ML400. 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 vehicle was not repaired. The manufacturer was contacted and stated that the VIN was not included in the recall. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was 79,000.
Mileage: 79,000
20230518ENGINE
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.
20180430CrashFatalSERVICE BRAKES
I BELIEVE WITH MY HEART AND SOUL MY BEAUTIFUL WIFE WAS KILLED DUE TO FAILURE OF VEHICLE IN MOTION AND LOST ALL CONTROL.*DT*JB
Mileage: 15,000
20180430CrashFatalSTEERING
I BELIEVE WITH MY HEART AND SOUL MY BEAUTIFUL WIFE WAS KILLED DUE TO FAILURE OF VEHICLE IN MOTION AND LOST ALL CONTROL.*DT*JB
Mileage: 15,000
20180430CrashFatalUNKNOWN OR OTHER
I BELIEVE WITH MY HEART AND SOUL MY BEAUTIFUL WIFE WAS KILLED DUE TO FAILURE OF VEHICLE IN MOTION AND LOST ALL CONTROL.*DT*JB
Mileage: 15,000
20150429POWER TRAIN
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. THIS FEATURE IS MISREPRESENTED IN THE OWNERS MANUAL WHICH STATES AS HAVING A MANUAL TRANSMISSON CONTROL CAPABILITY AND WAS ALSO SOLD AS SUCH BY THE DEALERSHIP.
Mileage: 800
20150429UNKNOWN OR OTHER
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. THIS FEATURE IS MISREPRESENTED IN THE OWNERS MANUAL WHICH STATES AS HAVING A MANUAL TRANSMISSON CONTROL CAPABILITY AND WAS ALSO SOLD AS SUCH BY THE DEALERSHIP.
Mileage: 800
Compare 2015MERCEDES-BENZML400 to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2015 MERCEDES-BENZ ML400 have?▼
The 2015 MERCEDES-BENZ ML400 has 8 NHTSA complaints, 3 crashes, 0 fires, 0 injuries, and 3 deaths reported.
What are the most common problems with the 2015 MERCEDES-BENZ ML400?▼
The most-complained component for the 2015 MERCEDES-BENZ ML400 is UNKNOWN OR OTHER with 2 complaints. Other frequently reported areas include POWER TRAIN and SERVICE BRAKES.
Is the 2015 MERCEDES-BENZ ML400 safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.