Most common 2007 Mercedes-Benz CLK350 problems
Share of the 42 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz CLK350 complaints by model year
Best CLK350 years: 2009, 2008. Years to avoid: 2006, 2007. Compare all years →
2007 Mercedes-Benz CLK350 recalls (4)
Visibility › Sun/moon roof assembly
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please see the recall report for a complete list of models and model years. The glass sunroof panel may not be properly secured and can detach.
Remedy: Dealers will inspect and replace the sunroof panel as necessary, free of charge. Owner notification letters were mailed January 10, 2025. Owners may contact MBUSA customer service at 1-800-367-6372.
Visibility › Sun/moon roof assembly
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The glass sunroof panel may not be properly secured and may detach.
Remedy: Dealers will inspect and replace the sunroof panel as necessary free of charge. Owner notification letters were mailed February 3, 2023. Owners may contact MBUSA customer service at 1-800-367-6372.
Visibility › Sun/moon roof assembly
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2007 C350, C230, C280, CLK350, E320CDI, E350 Wagon, E350, 2006 C55 AMG, CLK500, CLS500, CLS55 AMG, E500 Wagon, E500, E55 AMG, 2007 CLK550, CLS550, CLS63 AMG, E550, E63 AMG, and E63 Wagon AMG vehicles.
Remedy: MBUSA will notify owners, and dealers will inspect the glass panel bonding and replace the sliding roof, as necessary, free of charge. Owner letters were mailed May 7, 2021.
Visibility › Sun/moon roof assembly
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2001-2011 vehicles. The bonding between the glass panel and the sliding roof frame may deteriorate, possibly resulting in the glass panel detaching from the vehicle. For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V918-4126.pdf
Remedy: MBUSA will notify owners, and dealers will inspect the glass panel bonding and replace the sliding roof, as necessary, free of charge. The recall began July 10, 2020.
What 2007 Mercedes-Benz CLK350 owners say
Fuel & propulsion system
A very stong gasoline smell in the garage after having car filled. The strong smell has been going on for sometime but didn't think too much about it. Last week a plumber came to my house for a leaky pipe situation and noticed the smell and said that was not normal and cou ld present a fire hazard! I immediately took the car to greenway Mercedes late on Tuesday, 9-29-15. I said I won't have to pay for this because it must be a defect. They said indeed I would have to pay. The diagnostic showed that it was the seals in the fuel sending unit, and I paid $1400 to be repaired. I told them I was going to file a complaint with you because I had researched and found other complaints filed for the same problem with you.
Fuel is leaking from both sender units when tank is more than 3/4 full. Extreme fumes when car is parked in closed garage with a full tank. Smells like a large quantity of fuel is leaking. Paid for the same repair 20K miles ago, now same problem has returned. Mb dealer will not cover under warranty, cost for repair is $1800 (plus original repair). The symptoms are identical to investigation ea 13-003. Are similar parts involved? Given the vast number of complaints here and online forums, an investigation should be done. There is no way this amount of fuel leaking is not a safety issue. This is literally a "ticking time bomb".
Air bags
The contact owns a 2007 Mercedes-Benz CLK350. The contact stated while driving 10-15 MPH and making a turn, the contact became aware of an abnormal sound, and the driver's side roof air bags and driver's side door air bag inadvertently deployed. The contact was able to drive to the residence. The contact's neighbor later informed the contact that the rear driver's side tire was flat. The contact inspected the tire and noticed a blowout of the sidewall. The vehicle was towed to Costco, where the tire was replaced. The manufacturer was notified of the failure and referred the contact to the dealer for diagnostic testing. The vehicle was taken to the dealer. The contact stated that he had not been provided the diagnostic test information. The vehicle was not repaired. The manufacturer advised the contact to be patient. No further assistance was provided. …
The SRS (supplemental restraint system) light came on and a message saying there was a fault and the vehicle needs to be taken to the workshop. I took it to the dealer and was told the wiring harness in the driver seat needs replaced. This harness is connected to the side air bag located in the driver seat. The estimate to replace the harness is $850. The mechanic at the mb dealer said the wires wear away from seat movement over the years and now need replaced. This should not happen. The air bags are installed as a safety device and should not fail because the seat is moved back and forth when setting the seat position.
Transmission & drivetrain
Tl* the contact owns a 2007 Mercedes Benz CLK350. While driving approximately 45 MPH, the vehicle started to lose acceleration until it stopped in the middle of the road. The vehicle had to be turned off and then restarted. The vehicle was taken to three independent mechanics who diagnosed that the control speed sensor needed replacement. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 120,000. The VIN was not available.
I slowed down to make a turn and the car would not accelerate. It appeared to be stuck in high gear and did not shift back down to a low gear. This happened twice over a 3 week period. Both times I almost caused a traffic accident by being stuck in the middle of the road. I took the car to the mb dealer and was told it was the conductor plate sensor board that controls the transmission. The fix was $1300 to replace the unit.
2007 Mercedes-Benz CLK350 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.5L 6-cyl | 7-speed automatic | RWD | 17 / 25 / 20 |
EPA ratings. Class: Subcompact car.
Frequently asked questions
Is the 2007 Mercedes-Benz CLK350 a good car?
Based on 42 owner complaints filed with NHTSA, the 2007 CLK350 rates use caution: 3.3× as many complaints as a typical year of the CLK350 at the same age. It is one of the CLK350 years we suggest avoiding. 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 CLK350?
The fuel & propulsion system — 14 complaints, 33% of all complaints for this model year. Next are the air bags (7) and transmission & drivetrain (6).
How many recalls does the 2007 Mercedes-Benz CLK350 have?
There are 4 recalls for the 2007 Mercedes-Benz CLK350, the most recent from November 19, 2024 (sun/moon roof assembly). 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 CLK350?
The best years by complaints, compared at the same age, are 2009 and 2008. Years to avoid or approach with caution: 2006 and 2007. See the full Mercedes-Benz CLK350 years comparison.
At what mileage do 2007 Mercedes-Benz CLK350 problems happen?
The median mileage reported in complaints is about 70,000 miles; 28% 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.