"How reliable is the 2007 Mercedes Benz Ml320?"

"Based on 20 NHTSA complaints, the 2007 Mercedes Benz Ml320 has a median complaint mileage of 43000 miles. The most common issue is ENGINE AND ENGINE COOLING."

"What are common problems with the 2007 Mercedes Benz Ml320?"

"The most frequently reported component in NHTSA complaints for the 2007 Mercedes Benz Ml320 is ENGINE AND ENGINE COOLING, accounting for a significant portion of the 20 total complaints filed."

2007 Mercedes Benz Ml320: Reliability Data

Source: NHTSA — 20 complaints

Total Complaints

43,000mi

Median Mileage

ENGINE AND ENGINE COOLING

Top Issue

Crash Reports

When Do Complaints Happen?

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

26,476 25th Percentile

43,000 Median Mileage

89,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE AND ENGINE COOLING

SEATS

SERVICE BRAKES, HYDRAULIC

POWER TRAIN

ELECTRICAL SYSTEM

FUEL SYSTEM, GASOLINE

ENGINE AND ENGINE COOLING:ENGINE

STEERING

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)

AIR BAGS

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"TL*THE CONTACT OWNS A 2007 MERCEDES BENZ ML320. WHILE DRIVING 60 MPH, ALL OF THE INTERIOR AND INSTRUMENT PANEL LIGHTS ILLUMINATED AND THEN THE ENGINE STOPPED. THE STEERING DIMINISHED AND IT BECAME VERY DIFFICULT TO MANEUVER THE VEHICLE. THE CONTACT PULLED OFF THE ROAD AND THE VEHICLE WAS TOWED TO..."

"ON 2/16/09 WHILE OUT DRIVING WE SMELLED AN ELECTRICAL BURNING ODOR INSIDE OUR 2007 ML320CDI JUST AS WE ARRIVED AT OUR DESTINATION. WE LOOKED AROUND THE VEHICLE AND UNDER THE HOOD TO TRY AND FIGURE OUT WHAT WAS BURNING AND FOUND NOTHING UNUSUAL. THE ODOR WAS GONE BY THE TIME WE GOT BACK IN THE VEHIC..."

"DEAR NHTSA, MY '07 MERCEDES ML-320-CD WAS BOUGHT 'NEW'. THE DEFECT OF A RUN-AWAY, HI RPM REVVING-UP OF THIS DIESEL ENGINE WAS FIRST EXPERIENCED APPROX 21/2 MONTHS AGO. IT HAPPENED SHORTLY AFTER HAVING IT PARKED AT A LOCAL SHOPPING CTR FROM WHICH I DROVE IT ONTO THE MAIN STREET ATA MODERATE SPEED ..."

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