Most common 2007 Mercedes-Benz R320 problems
Share of the 14 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz R320 complaints by model year
Best R320 years: 2008, 2009. Compare all years →
2007 Mercedes-Benz R320 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 R320 owners say
Engine & cooling
Engine 'died' (vehicle lost all power) while traveling at highway speed. I had to pull vehicle over on side of the road with no power assistance steering or braking. Brough it to the dealer for service 8/8/12, stalled two more times while enroute. I was told that it is a failed camshaft sensor. I looked up all safety recalls on vehicle, and found one for the crankshaft sensor in 2008. I was told that my failed camshaft sensor is different and is not covered by the manufacturer, even though it produces the same symptom/result as a failed crankshaft sensor. Both items perform simarlarly in that they assure correct engine timing, disabling the engine if a failure is detected in either part! I submit that this is a safety issue and should at least be covered by the manufacturer!
On a 4 lane highway with a posted speed limit of 55 MPH vehicle was stopped at a light. Upon takeoff vehicle went into "low power" mode. Vehicle then became a hazard due to slow acceleration and not being able to pull off the highway in a safe manner due to heavy traffic. Vehicle has had a new turbo/waste gate assembly installed but still goes into low power mode without warning. No check engine light. In most cases if the vehicle can be gotten off the road and turned off for a few minutes it will return to normal. This May last for several days or several minutes. This seems to be a common problem for vehicles with the 3.0 turbo diesel including sprinter vans.
Electrical system
The contact owns a 2007 Mercedes-Benz R320. The contact stated the vehicle failed to start in very cold weather. The contact stated that after changing the battery several times, the failure continued to occur. Additionally, while operating the vehicle, the front and rear exterior lights failed to illuminate as needed. The contact stated that the failure was intermittent. The cause of the failure was not yet determined. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet contacted. The failure mileage was 75,000.
Engine 'died' (vehicle lost all power) while traveling at highway speed. I had to pull vehicle over on side of the road with no power assistance steering or braking. Brough it to the dealer for service 8/8/12, stalled two more times while enroute. I was told that it is a failed camshaft sensor. I looked up all safety recalls on vehicle, and found one for the crankshaft sensor in 2008. I was told that my failed camshaft sensor is different and is not covered by the manufacturer, even though it produces the same symptom/result as a failed crankshaft sensor. Both items perform simarlarly in that they assure correct engine timing, disabling the engine if a failure is detected in either part! I submit that this is a safety issue and should at least be covered by the manufacturer!
2007 Mercedes-Benz R320 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.0L 6-cyl turbo diesel | 7-speed automatic | 4WD/AWD | 19 / 26 / 21 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2007 Mercedes-Benz R320 a good car?
Based on 14 owner complaints filed with NHTSA, the 2007 R320 rates average: 3.1× as many complaints as a typical year of the R320 at the same age. 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 R320?
The engine & cooling — 3 complaints, 21% of all complaints for this model year. Next are the electrical system (3) and suspension (2).
How many recalls does the 2007 Mercedes-Benz R320 have?
There are 2 recalls for the 2007 Mercedes-Benz R320, 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 R320?
The best years by complaints, compared at the same age, are 2008 and 2009. See the full Mercedes-Benz R320 years comparison.
At what mileage do 2007 Mercedes-Benz R320 problems happen?
The median mileage reported in complaints is about 103,000 miles; 17% 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.