2004 Mercedes-Benz ML500 Engine Problems
- Complaints
- 1about this part
- Share
- 6%of 18 total for the year
- Median mileage
- 125,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine of the 2004 Mercedes-Benz ML500, 6% of the 18 complaints for this model year. Where a mileage was given, the median is 125,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“This could be related to a software problem in all ml class. 1. Obd system cause the check engine light to illuminate incorrectly 2. Stuck fuel-level sensor cause to report incorrectly 3. The speedometer out of tolerance is reporting incorrectly 4. Obd system is reporting incorrectly causing faults in systems.”
NHTSA complaint #10668448, filed 2014-12, 125,500 milesRelated service bulletins
- 11017039Apr 1, 2025Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant…
- 10135598Mar 25, 2015Engine diagnosis warning lamp lights up in instrument cluster, fault code U145400: "Implausible data were received from the ethanol sensor"
Engine: other model years
Other parts of the 2004 Mercedes-Benz ML500
5 complaintsSteering
5 complaintsSeats
3 complaintsBrakes
2 complaintsExterior lighting
2 complaintsElectronic stability control
1 complaintsFuel system
1 complaintsBody and structure
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2004 Mercedes-Benz ML500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology