Mercedes-Benz ML320 Engine and Engine Cooling Problems
Owners have filed 112 complaints with NHTSA about engine and engine cooling problems on the Mercedes-Benz ML320 across 8 model years. The 1999 model year has the most (35). The words owners use most often: “harmonic balancer” (20% of reports).
- 112engine and engine cooling complaints
- —median miles at failure
- 3mention a crash
- 3mention an injury
- 0related recalls
- 36%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Harmonic balancer: mentioned in 22 of 112 complaints (20%)
- Oil pan: mentioned in 11 of 112 complaints (10%)
- Catalytic converter: mentioned in 11 of 112 complaints (10%)
- Loss power steering: mentioned in 6 of 112 complaints (5%)
At what mileage do engine and engine cooling problems happen?
Based on 77 complaints that reported the odometer reading.
How serious are the reports?
Of 112 complaints, 3 mention a crash, 2 a fire, 3 an injury.
Mercedes-Benz ML320 engine and engine cooling complaints by model year
| Model year | Engine and Engine Cooling complaints | Share of that year | Median miles |
|---|---|---|---|
| 2009 ML320 | 4 | 14% | 58,331 |
| 2008 ML320 | 2 | 10% | 28,900 |
| 2007 ML320 | 5 | 31% | 36,000 |
| 2002 ML320 | 5 | 6% | 69,500 |
| 2001 ML320 | 3 | 2% | 65,546 |
| 2000 ML320 | 27 | 16% | 60,000 |
| 1999 ML320 | 35 | 28% | 72,730 |
| 1998 ML320 | 31 | 23% | 79,279 |
When owners reported it
Related recalls (0)
No safety recall lists engine and engine cooling for the Mercedes-Benz ML320. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
TL* THE CONTACT OWNS A 2007 MERCEDES-BENZ ML320. WHILE THE CONTACT WAS MERGING INTO HIGHWAY TRAFFIC, WHITE AND GRAY WAS SEEN UNDER THE HOOD OF THE VEHICLE. THE CONTACT PULLED THE VEHICLE OVER TO THE SIDE OF THE ROAD AND TURNED OFF THE ENGINE. PRIOR TO THE FAILURE, THE VEHICLE HESITATED WHILE…
2000 mercedes benz ml320. Consumer writes in regards to cracked exhaust system and cracked catalytic converter. *ld the consumer stated the vehicle was visually inspected and documented that recall repair was completed. No repairs were made. *js
Tl* the contact owns a 2009 mercedes benz ml320. While driving approximately 60 mph, the vehicle stalled without warning. The vehicle restarted after several attempts. The vehicle was taken to an independent mechanic who stated that the camshaft position sensor failed and needed to be replaced. The…
Check engine light warning with code #20be1b. Repair indicates need of diesel exhaust fluid (def) heater repair kit. Diesel exhaust fluid system is part of emissions system. Mb dealership says no warranty for repair. Internet research widespread problem with def system around 50,000 miles. *tr
Driving home on a local street at about 30 miles per hour, approaching intersection, trying to turn, all the sudden, steering wheel became very hard to turn, with no assisting power, car run over to the other side of the road, almost crash into curb. It is very lucky, there is no incoming cars…
Frequently asked questions
Do all Mercedes-Benz ML320s have engine and engine cooling problems?
No. NHTSA has 112 owner complaints about engine and engine cooling for the Mercedes-Benz ML320. Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the Mercedes-Benz ML320 engine and engine cooling?
No recall currently lists engine and engine cooling for this vehicle.
What do owners say about engine and engine cooling problems on the Mercedes-Benz ML320?
The most frequent phrase is “harmonic balancer”, in 22 of 112 complaints, followed by “oil pan” (11).
Other Mercedes-Benz ML320 problems
- Steering problems (140)
See all Mercedes-Benz ML320 problems.