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Fuel systemPart report

2001 Mercedes-Benz ML320 Fuel system Problems

Complaints
11about this part
Share
8%of 136 total for the year
Median mileage
56,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 11 complaints about the fuel system of the 2001 Mercedes-Benz ML320, 8% of the 136 complaints for this model year. Where a mileage was given, the median is 56,000 miles. 1 of these say a crash was involved and 2 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.

“My ML320 vehicle was driven for approximately five hours round trip then parked for the evening. I attempted to start the vehicle the following morning and the vehicle would not start. After doing an exhaustive diagnostic on the vehicle. I removed the fuel pump from inside the fuel tank. I saw that the wiring harness/connector for the hot lead was black and brown in color and the plastic around the harness had melted. I took pictures and stored the pump. I emailed mercedes and asked them to get back with me since my wife and children had been in the vehicle and this is the family vehicle. …”

NHTSA complaint #10457817, filed 2012-05, 182,741 miles

“I own a mercedes ml 320, 2001 model. The vehicle has had repeated failures since I purchased it new. The vehicle is now three years old and has 5700-0 miles on it. The most serious failures involve the fuel pump on this vehicle. The fuel pump has failed twice, with the most recent failure being 11/13/03. Large amounts of gas fumes fill the passenger compartment and a serious danger of explosion exist. The fuel pump location for this model is underneath the rear passenger seat and directly under where my children sit. …”

NHTSA complaint #10047184, filed 2003-11, 11,000 miles

“Ecm is malfunctioning and not controlling fuel injection and giving random misfire on cylinders 2, 3, 4, 5, 6. Causing check engine light to come on . Codes 0300, 0302,0303,0304,0305,0306.”

NHTSA complaint #11301012, filed 2020-01, 200,000 miles

“While driving at highway speeds vehicle stalled. Consumer had the vehicle towed. Dealership informed the consumer that the problem pertained to the fuel pump module, but the problem had not been resolved.”

NHTSA complaint #10072260, filed 2004-05, 56,000 miles

“The defect stated in recall 03 v 121 000 for the power steering hose clamp happened while the consumer was waiting to be notified. The consumer experienced the following: the entire instrument cluster lit up and flashed and beeped, lost the speedometer, tachometer, gas/gas temperature gauge, and the vehicle had gone into second gear and did come out for some time(discovered it was in limp-home mode). The service dealer advised the consumer that the problem was the gear selector. …”

NHTSA complaint #10022912, filed 2003-07, 52,025 miles

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
2009932%
2007213%
2005120%
200329%
200222%
2001118%
20001610%
19991411%
19982015%

Other parts of the 2001 Mercedes-Benz ML320

Brakes
48 complaintsElectronic stability control
33 complaintsSteering
25 complaintsElectrical system
16 complaintsVehicle speed control
16 complaintsAir bags
8 complaintsOther or unknown
5 complaintsSeats
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsEngine cooling
3 complaintsLatches, locks and linkages
3 complaintsSuspension
3 complaints

← All problems reported for the 2001 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