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Electrical systemPart report

2001 Mercedes-Benz ML320 Electrical system Problems

Complaints
16about this part
Share
12%of 136 total for the year
Median mileage
52,025miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 16 complaints about the electrical system of the 2001 Mercedes-Benz ML320, 12% of the 136 complaints for this model year. Where a mileage was given, the median is 52,025 miles. 2 of these say a crash was involved and 3 a fire, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“On or about may 14, 2012, while I was driving on the freeway at full freeway speed, the vehicle suddenly self-initiated a continuous brake activation without me pressing on the brakes or taking any other action. The vehicle's sudden, unexpected and sustained braking action resulted in a near-collision with a semi-truck traveling behind me which the truck-driver was fortunately just able to prevent. I steered the vehicle to the freeway shoulder as the un-commanded braking action brought the vehicle to a stop. …”

NHTSA complaint #10466598, filed 2012-07, 182,000 miles

“My 2001 mercedes ML320 SUV developed a defect in the ignition switch, whereby the key came out while the car was not in the park position. In june 2009, the car was parked in my driveway and ignition turned off. I didn't realize that the key came out when the car was in neutral instead of park. After a while the car rolled backwards and hit a neighbors car and the garage door opposite my driveway. I reported the incident to mercedes and the dealer said that the defect cannot be covered free by the manufacturer as the car was out of warranty. …”

NHTSA complaint #10341278, filed 2010-07, 97,950 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

“Safety system failure, including braking assist, seat belts, air bags and tel-aide due to computer chip failure. Caused two accidents after which customer paid to have vehicle reviewed bumper to bumper and the failing chip was replaced. During this time, the dash warning lights did not illuminate to warn of the failure which the vehicle computer documented 15 times in a six-month period (between the two accidents). Approximately eight months later, the warning light on the dash illuminated again. …”

NHTSA complaint #10158774, filed 2006-06, 76,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2009311%
2008419%
2007213%
200329%
20021922%
20011612%
20002012%
199932%
19982116%

Other parts of the 2001 Mercedes-Benz ML320

Brakes
48 complaints
Electronic stability control
33 complaints
Steering
25 complaints
Vehicle speed control
16 complaints
Fuel system
11 complaints
Air bags
8 complaints
Other or unknown
5 complaints
Seats
4 complaints
Visibility (wipers, defrost, mirrors)
4 complaints
Engine cooling
3 complaints
Latches, locks and linkages
3 complaints
Suspension
3 complaints

← All problems reported for the 2001 Mercedes-Benz ML320

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