2003 Mercedes-Benz ML320 Vehicle speed control Problems
- Complaints
- 4about this part
- Share
- 18%of 22 total for the year
- Median mileage
- 143,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the vehicle speed control of the 2003 Mercedes-Benz ML320, 18% of the 22 complaints for this model year. Where a mileage was given, the median is 143,500 miles. 1 of these say a crash was involved, 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.
“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“My wife drove the vehicle to work one day and when she was pulling out of the parking lot onto a busy street, the yellow triangle with exclamation point started to flash and engaged the brakes. My wife quickly pull over to the side of the street and made her way back into the parking lot while the brakes where engaging. My wife was unable to drive the vehicle home from work. We let the vehicle sit for several minutes and I was able to get the vehicle moving but the brakes were engaging again. I was able to get the vehicle back home. …”
NHTSA complaint #10936005, filed 2016-12, 187,000 miles“While parking vehicle accelerated. Consumer applied the brake pedal but the brakes failed. This caused consumer's vehicle to collide with the vehicle in front. The vehicle was taken to the dealer for inspection. The cause had not been determined.”
NHTSA complaint #10079386, filed 2004-06“The contact owns a 2003 Mercedes-Benz ML320. The contact stated that the vehicle accelerated independently and the rpms revved without warning. The vehicle was taken to a dealer multiple times, but the failure was unable to be diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was not available.”
NHTSA complaint #10874688, filed 2016-06Vehicle speed control: other model years
Other parts of the 2003 Mercedes-Benz ML320
6 complaintsSteering
6 complaintsBrakes
4 complaintsElectrical system
2 complaintsElectronic stability control
2 complaintsFuel system
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