Most common 2007 Mercedes-Benz ML320 problems
Share of the 16 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz ML320 complaints by model year
Best ML320 years: 2005, 2007, 2008. Years to avoid: 1998, 2000, 1999, 2001, 2002. Compare all years →
2007 Mercedes-Benz ML320 recalls (2)
Service brakes, hydraulic › Power assist › Vacuum
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML, GL, and R-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. Moisture may accumulate and cause corrosion in the brake booster housing unit, which can result in reduced brake performance or brake failure.
Remedy: Owners are advised not to drive their vehicles until the remedy has been performed. Dealers will remove the rubber sleeve, inspect the brake booster, and as necessary, replace the brake booster.
Service brakes, hydraulic › Power assist › Vacuum
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML-Class, GL-Class, and R-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. Moisture may accumulate and cause corrosion in the brake booster housing unit, which can result in reduced brake performance or brake failure.
Remedy: Owners are advised not to drive their vehicles until the remedy has been performed. Dealers will remove the rubber sleeve, inspect the brake booster, and as necessary, replace the brake booster.
What 2007 Mercedes-Benz ML320 owners say
Engine & cooling
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 driving. The contact pointed out that the vehicle was equipped with a diesel engine. The vehicle was towed to the dealer (Mercedes-Benz of annapolis, 324 6th st. Annapolis, md 21403, [phone]) where it was diagnosed with catastrophic engine failure. The exhaust manifold ruptured, which caused the engine wiring harness to melt. The dealer informed the contact that 'the vehicle was done'. The contact's insurance company was notified and the vehicle was awaiting inspection to determine if the vehicle was a total loss. The manufacturer was not made aware of the failure. …
I purchased a used 2007 Mercedes ML320 cdi on March 12. After a week of driving - I inspected the engine compartment (I usually do). I noticed engine oil dripping (small but noticeable amount) on the serpentine belt. I did not think it was urgent - so I took pictures so I can send it to my seller to claim warranty. On March 23, I was driving with my family on I-65. Suddenly, steering became very hard. It was a curving highway so I was forced to go into other lanes. Lucky, traffic was not heavy so I did not swerve into any other vehicle. I was able to wrestle with the steering wheel on time to move away safely. Also, at the same time we lost steering, the battery light went on. After stopping, we popped the hood and immediately noticed the same belt mentioned earlier had disintegrated into several pieces. We called for a tow vehicle. …
Seats
Seat back warmer overheats/burns small burn - the drivers side seat seat warmer burned a whole through the material and through my wife jacket causing a small burn above her left leg. Basically a thermal incident in which the seat has a hole the size of a quarter burned through the seat cover. Was driving home from work.
Driver heated seat back cushion burned a hole through the seatback and driver's coat causing her to swerve off road ... No collision. Car has 23,000 miles and was only driven a mile before incident.
Brakes
The contact owns a 2007 Mercedes-Benz ML320. The contact was made aware of NHTSA Campaign Number: 22V315000 (Service Brake, Hydraulic) however, the part to do the recall repair was not yet available. The local dealers Mercedes-Benz of Seattle (2025 Airport Way S, Seattle, WA 98134:[phone]) and Mercedes-Benz of Lynnwood (17800 Hwy 99, Lynnwood, WA 98037:[phone]) were contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
The contact owns a 2007 Mercedes-Benz ML320. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulics) however, the part to do the recall repair was not yet available. The dealer was made aware of the issue. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact had not experienced a failure. Parts distribution disconnect.
2007 Mercedes-Benz ML320 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.0L 6-cyl turbo diesel | 7-speed automatic | 4WD/AWD | 19 / 24 / 21 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2007 Mercedes-Benz ML320 a good car?
Based on 16 owner complaints filed with NHTSA, the 2007 ML320 rates better than average: 81% fewer complaints than a typical year of the ML320 at the same age. It is one of the best ML320 years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2007 Mercedes-Benz ML320?
The engine & cooling — 5 complaints, 31% of all complaints for this model year, most often about engine. Next are the seats (3) and brakes (3).
How many recalls does the 2007 Mercedes-Benz ML320 have?
There are 2 recalls for the 2007 Mercedes-Benz ML320, the most recent from April 26, 2024 (vacuum). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Mercedes-Benz ML320?
The best years by complaints, compared at the same age, are 2005, 2007 and 2008. Years to avoid or approach with caution: 1998, 2000, 1999, 2001 and 2002. See the full Mercedes-Benz ML320 years comparison.
At what mileage do 2007 Mercedes-Benz ML320 problems happen?
The median mileage reported in complaints is about 50,000 miles; 50% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.