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BrakesPart report

2002 Mercedes-Benz ML500 Brakes Problems

Complaints
6about this part
Share
22%of 27 total for the year
Median mileage
49,507miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 6 complaints about the brakes of the 2002 Mercedes-Benz ML500, 22% of the 27 complaints for this model year. Where a mileage was given, the median is 49,507 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, ML500 began to brake randomly . Also ABS turned on while stopping and accelerating. Also brakes were constantly screeching. Warning lights for ABS, bas, and washer fluid. Fluid level was fine. I told dealer about these problems before warranty had expired. They ran a diagnostics test and found nothing was wrong. They advised me to bring the vehicle in should the same events occur. (the random breaking began to occur after warranty expired). The problem continued to persist and with the failure of ABS system, I brought the ML500 back to the service center. …”

NHTSA complaint #10189784, filed 2007-05, 77,000 miles

“Warranty issues and/or manufacturing defects that should be covered by warranty. On october. 21, 2003 took my ML500 year 2002 to dealer for squealing and scraping brakes. Service department could not diagnose the problem the squealing and scraping and told me that brake disc and pads looks fine. However they advised me to buy newer version of brake pads, which would not squeal. I refused to buy brake pads, as they should be covered under warranty. I was not satisfied, therefore took the vehicle again next day (october 22,2003) and talked to the sales person from whom I bought the vehicle. …”

NHTSA complaint #10096242, filed 2004-10, 22,014 miles

“Found identical problem per NHTSA action # ea08009 defect investigation. Constant loss of brake pressure. Warning lights indicated low brake fluid. Found fluid under car and in front left wheel-well. Upon inspection, found brake hard line from master cylinder was chaffed from adjacent fuel line, causing small pin-hole leak in brake line. When brakes were applied, brake fluid would spray out, resulting in insufficient braking pressure to hold vehicle at stops. Contacted mercedes dealership service department, they were un-aware of any problems associated with this. …”

NHTSA complaint #10254638, filed 2009-01, 108,631 miles

“Warranty issues and/or manufacturing defects that should be covered by warranty. At the first 10,000 miles, the consumer noticed brake travel was too long and was advised by an service advisor that this was normal. However at less than 3,000 miles, the brakes were still not adequate and there was a squeaking noise from the rear brakes when braking. This time, the consumer was advised that the rear brake pads were gone and the rotors were scored due to too much city driving and the service advisor would not honor repairs under warranty.”

NHTSA complaint #10057273, filed 2004-01, 10,000 miles

“There is a serious defect in the YAW rate sensors in these Mercedes ML W163's. Thank God I was driving down a secluded road and nobody was behind me, but my vehicles brakes locked up, on their own, even with my foot on the accelerator pedal, with no warning lights or warning signals. I have no error codes, and my vehicle is well maintained. There are many many people that are having the same issue with their Mercedes ML's. Some people have experienced this happening to them at freeway speeds. …”

NHTSA complaint #11443393, filed 2021-12

Related service bulletins

Brakes: other model years

YearComplaintsShare of year
2007111%
2006719%
2004211%
2003323%
2002622%

Other parts of the 2002 Mercedes-Benz ML500

Steering
7 complaints
Electrical system
3 complaints
Vehicle speed control
3 complaints
Visibility (wipers, defrost, mirrors)
3 complaints
Engine cooling
2 complaints
Transmission and drivetrain
2 complaints
Air bags
1 complaints
Electronic stability control
1 complaints
Engine
1 complaints
Equipment
1 complaints
Exterior lighting
1 complaints
Fuel system
1 complaints

← All problems reported for the 2002 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