2012 Mercedes-Benz Ml350: Reliability Data

Source: NHTSA — 91 complaints
91
Total Complaints
48,000mi
Median Mileage
ENGINE
Top Issue
8
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

16,000 25th Percentile
48,000 Median Mileage
83,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE
21
FUEL/PROPULSION SYSTEM
11
ELECTRICAL SYSTEM
11
EXTERIOR LIGHTING
9
STEERING
6
POWER TRAIN
5
SEAT BELTS
3
FUEL SYSTEM, GASOLINE
3
STRUCTURE:BODY
3
LANE DEPARTURE: BLIND SPOT DETECTION
3

Severity Assessment

8
Crashes
1
Fires
6
Injuries
0
Deaths

Sample Complaint Reports

"I ACCELERATED TO ENTER INTERSTATE #81 AND THE THROTTLE PEDAL RETRACTED FROM FOOT AND PRESSED TO FLOOR. FELT AS IF CRUISE CONTROL HAD ENGAGED BUT IT HAD NOT BEEN. I TAPPED BREAK PEDAL REPEATEDLY AND VEHICLE WOULD NOT STOP. IF IT WAS IN CRUISE CONTROL THIS SHOULD HAVE DISENGAGED IT. THE THROTTLE WAS ..."
"TL* THE CONTACT OWNS A 2012 MERCEDES BENZ ML 350. THE CONTACT STATED THAT THE VEHICLE WOULD NOT START UNTIL AFTER SEVERAL ATTEMPTS. WHILE DRIVING, THE VEHICLE BEGAN TO LOSE POWER. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS, WHO STATED THAT THEY NEEDED TO REPLACE THE PISTONS IN THE ENGINE. THE..."
"VEHICLE LOSES POWER AFTER A FEW HOURS OF DRIVING. THIS PROBLEM DOES NOT SHOW ANY ERROR MESSAGE ON THE DASHBOARD, AND THE DEALER CANNOT FIX THIS PROBLEM AFTER MULTIPLE ATTEMPTS. LAST TRIP TO THE DEALER WHICH WAS 2 WEEKS AGO, THEY INSISTED THAT NOTHING WAS WRONG. HERE ARE EXAMPLES OF HOW SERIOUS THE..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28