2004 Mercedes-Benz ML350 Engine Problems
- Complaints
- 2about this part
- Share
- 6%of 35 total for the year
- Median mileage
- 103,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 2004 Mercedes-Benz ML350, 6% of the 35 complaints for this model year. Where a mileage was given, the median is 103,500 miles. 1 a fire, according to the filers.
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.
“The contact owns a 2004 mercedes benz ML350. The contact stated that while the vehicle was in park, the contact noticed fire coming from the engine compartment. The fire department extinguished the fire. A police report was filed. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 117,000.”
NHTSA complaint #10684301, filed 2015-02, 117,000 miles“The contact owns a 2004 Mercedes-Benz ML350. While driving various speeds, the power steering malfunctioned. The steering wheel was difficult to turn and the steering fluid had to be replaced several times. The contact stated that the steering wheel made a loud grinding noise when it was turned and power steering fluid leaked from the column. In addition, the check engine indicator illuminated without warning. It was diagnosed that the power steering hose needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 90,000.”
NHTSA complaint #10936803, filed 2016-12, 90,000 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
| Year | Complaints | Share of year |
|---|---|---|
| 2015 | 11 | 21% |
| 2014 | 16 | 24% |
| 2013 | 13 | 23% |
| 2012 | 21 | 32% |
| 2011 | 7 | 6% |
| 2010 | 5 | 5% |
| 2008 | 3 | 4% |
| 2007 | 5 | 6% |
| 2006 | 36 | 21% |
| 2005 | 1 | 4% |
| 2004 | 2 | 6% |
| 2003 | 2 | 8% |
Other parts of the 2004 Mercedes-Benz ML350
6 complaintsAir bags
5 complaintsBrakes
4 complaintsElectrical system
4 complaintsFuel system
4 complaintsSeats
4 complaintsEngine cooling
3 complaintsExterior lighting
2 complaintsOther or unknown
2 complaintsBody and structure
2 complaintsEquipment
1 complaintsTires
1 complaints
← All problems reported for the 2004 Mercedes-Benz ML350
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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