2003 Mercedes-Benz ML500 Fuel system Problems
- Complaints
- 1about this part
- Share
- 8%of 13 total for the year
- Median mileage
- 81,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the fuel system of the 2003 Mercedes-Benz ML500, 8% of the 13 complaints for this model year. Where a mileage was given, the median is 81,000 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.
“The contact owns a 2003 mercedes benz ML500. While driving approximately 40 MPH, the brake pedal was depressed and failed to respond intermittently. The ABS warning light illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 81,000...updated 08/06/15 the consumer stated two lines from the reservoir to the hydraulic pressure regulator failed. Further investigation revealed all the brake lines had severe pitting and corrosion , as well as the fuel lines. …”
NHTSA complaint #10730545, filed 2015-06, 81,000 milesRelated service bulletins
- 10033607Jan 1, 2010Mercedes benz: check for installation of spacer between brake and fuel line, install if necessary. The spacer between the brake line and fuel line may not have been installed…
- 10032707Sep 10, 2009Mercedes: ensuring unobstructed movement for the fuel level sensor. When installing the left or right fuel level sensor, it is essential for it to have unrestricted, unobstructed…
Fuel system: other model years
Other parts of the 2003 Mercedes-Benz ML500
5 complaintsBrakes
3 complaintsElectrical system
3 complaintsSeats
3 complaintsSteering
3 complaintsTires
1 complaints
← All problems reported for the 2003 Mercedes-Benz ML500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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