1999 Mercedes-Benz ML

Typical pattern

3.6% of complaints about the 1999 Mercedes-Benz ML came in the first year, which is unremarkable for a 1999 vehicle — around the middle of the 201 model-years on record. The median complaint arrives at 5.5 yr in service. The most-reported system is engine cooling (45 complaints), typically at 5.2 yr or about 72,460 miles.

Covers 2 variants: ML320 (164), ML430 (59)

Complaints: 194
Median age at failure: 5.5 yr
Median mileage: 72,000 n=132
Crash / fire / tow: 11.3% of reports
Safety recalls: 0

In owners’ own words

Fuel system mileage not reported 1.1 yr in service

NOTICED POOR GAS MILEAGE. CONTACTED DEALER, AND REPLACED FUEL SENDING UNIT. SECOND TIME REPLACED A FUEL PUMP . ALSO, ENGINE CHECK LIGHT CAME ON.

Fuel system mileage not reported 2.3 yr in service

VEHICLE WAS SHUTTING OFF AND BURNING A LOT OF GAS. CONSUMER WAS GOING ON A TRIP, AND DEALER CHECKED VEHICLE THE DAY BEFORE THE ROAD TRIP. CONSUMER WAS 100 MILES AWAY, AND VEHICLE CUT OFF. VEHICLE WAS TOWED TO NEAREST DEALER. CAUSE STILL CANNOT BE FOUND.*AK

Fuel system mileage not reported 4.1 yr in service

CONSUMER STATES THAT WHILE DRIVING AT ANY SPEED AND NO WARNING THE FUEL TANK CRACKED CAUSING FLUID TO LEAK OUT. DEALER NOTIFIED. MR

Power train mileage not reported 1.3 yr in service

WHILE DRIVING ABOUT ANY SPEED TRANSMISSION WILL LOSE POWER, USUALLY WHEN SHIFTING SPEED. *AK

Other ML model years

How to read this

This is what owners reported, not a reliability rating. People file with NHTSA about alarming failures, not routine ones, and complaint volume tracks how many cars were sold.
Failure ages come from the incident date on each complaint, populated on about 83% of records. Mileage is shown where reported — NHTSA’s 2021 system change cut mileage capture to roughly 15%, so it thins out sharply after MY2020.
Every rank compares this vehicle only against others of the same model year. A 2025 car has not had time to accumulate five-year failures, so comparing early-failure share across years is meaningless.
Fourteen make-months distorted by media storms and mass recalls — Toyota in February 2010 ran 11× normal volume across 33 models — are excluded.
Recalls are manufacturer actions and authoritative; complaints are not. A recall listed here may already have been performed on any individual car. Check a specific VIN at nhtsa.gov/recalls.

1999 Mercedes-Benz ML

When each system is reported — middle 50% of complaints

In owners’ own words

Other ML model years

How to read this