2003 Mercedes-Benz ML320 Fuel system Problems
- Complaints
- 2about this part
- Share
- 9%of 22 total for the year
- Median mileage
- 100,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the fuel system of the 2003 Mercedes-Benz ML320, 9% of the 22 complaints for this model year. Where a mileage was given, the median is 100,000 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.
“While driving, went over bump in road, and truck immediately lost speed. Pressure on gas pedal weakend. There was absolutely no acceleration. I pulled over after almost being hit, and turned vehicle off. Restarted and pull over into autozone to have them hook it up to diagnostic reader. It came back with several codes, that all stated throttle pedal positioner malfunction I have bought and replaced this item 4 times since this incident, and the problem still exists. …”
NHTSA complaint #10594921, filed 2014-05, 100,000 miles“When filling the vehicle with fuel, the fuel gauge does not give a proper reading. Manufacturer serviced the vehicle 6-7 times, but couldn't find the cause of the problem.”
NHTSA complaint #10080159, filed 2004-06Related service bulletins
- 10167553Jul 1, 2013Combination message: "Clean fuel filter" is displayed. The fault code 162500 (water level message - Bosch) or P226997 (water level message - Delphi) or 171600 (filter load…
- 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…
- 10029105Apr 2, 2009Mercedes benz: fuel loss at pressure regulator valve and/or poor engine running characteristics (shakes, knocks, surges, changes to lip home mode, poor output, poor fuel economy…
- 10026201Jun 16, 2008Mercedes benz: work on pressure regulator valve (as of cd13, 1600 bar system). Fuel loss at the pressure regulator valve and/or poor engine running characteristics (shakes…
Fuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2009 | 9 | 32% |
| 2007 | 2 | 13% |
| 2005 | 1 | 20% |
| 2003 | 2 | 9% |
| 2002 | 2 | 2% |
| 2001 | 11 | 8% |
| 2000 | 16 | 10% |
| 1999 | 14 | 11% |
| 1998 | 20 | 15% |
Other parts of the 2003 Mercedes-Benz ML320
6 complaintsSteering
6 complaintsBrakes
4 complaintsVehicle speed control
4 complaintsElectrical system
2 complaintsElectronic stability control
2 complaintsTransmission and drivetrain
2 complaintsAir bags
1 complaintsSuspension
1 complaints
← All problems reported for the 2003 Mercedes-Benz ML320
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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