There are 2 owner-reported fuel system complaints for the 2003 Mercedes-Benz ML-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2003 MERCEDES BENZ ML500. WHILE DRIVING APPROXIMATELY 40 MPH, THE BRAKE PEDAL WAS DEPRESSED AND FAILED TO RESPOND INTERMITTENTLY. THE ABS WARNING LIGHT ILLUMINATED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 81,000...UPDATED 08/06/15 *BF THE CONSUMER STATED TWO LINES FROM THE RESERVOIR TO THE HYDRAULIC PRESSURE REGULATOR FAILED. FURTHER INVESTIGATION REVEALED ALL THE BRAKE LINES HAD SEVERE PITTING AND CORROSION , AS WELL AS THE FUEL LINES. UPDATED 08/13/15*JB UPDATED 8/28/15*CN UPDATED 09/01/15*LJ UPDATED 09/08/15*JB UPDATED 10/01/15*LJ UPDATED 10/31/2017*CN
WHILE DRIVING IN MODERATE TRAFFIC ENGINE STOPPED. DRIVER (NOT ME) WAS VERY SCARED AND SAID AN ACCIDENT ALMOST OCCURRED AS SHE MANEUVERED TO BREAKDOWN LANE WITHOUT POWER AND NO POWER STEERING. SECOND OCCURRENCE OF SUDDEN ENGINE STOPPAGE WHILE DRIVING WITH LOSS OF ENGINE POWER AND POWER STEERING IN THIS VEHICLE. FUEL PUMP HAD BEEN PREVIOUSLY REPLACED. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026