Mercedes-Benz CLK550 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz CLK550

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Mercedes-Benz CLK550 Problems

Oil Seepage on Back of the Cylinder Heads

The Mercedes Benz CLK550 may have engine oil seeping or leaking from the back of the cylinder heads. This is commonly misdiagnosed as leaking valve covers.

On the back of the cylinder heads there are three, in total, plastic expansion plugs that plug access ports to the camshafts. These plugs are well known for seeping oil, and leaking if left unattended. The oil will run down the back of the engine and eventually make it to the ground. 

Replacement of these three plastic plugs is extremely simple, and should be done as regular maintenance. The recommended interval for replacement is every 60,000 miles.

HVAC Oder Due to Mildew in Heater Box

The heating, ventilation and AC (HVAC) heater box is susceptible to mildew buildup. This can result in a musty odor from the HVAC system, most noticeable when the system is first turned on.

Alignment &Tire Wear Issue and/or Clunk or Thud From Front Suspension

Torque thrust bushings in the front suspension may crack and leak oil, this causes steering alignment problems and excessive tire wear. Another symptom of a worn bushing is a clunk or thud noted when turning, on hard acceleration, or hard braking.

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Mercedes-Benz CLK550 Recalls

Incorrect Software Calibration May Cause Fuel Pump to Remain Powered in a Collision

There is a faulty software calibration that affects several areas including shutting off the fuel supply in a collision. This could cause a fire hazard during an accident. Dealers will reprogram this software. The Mercedes-Benz recall number is 2008 070001. This recall began during August, 2008.

Internal Failure of Front Interior Control Module

Transistors used in the front signal acquisition and actuation module (SAM-F) may have been damaged during module assembly. As a result, the module could fail without warning, increasing the risk of a crash. Dealers will inspect and replace the affected modules as necessary. This recall is scheduled to begin on May 2, 2008. The Mercedes-Benz recall number is 2008 030005.

Rear Seat Belts May Not Secure Child Safety Seat

The rear outer seat belts may not latch correctly when used with certain child safety seats, increasing the risk of injury in the event of a crash. Dealers will replace the affected seat belts. This recall is expected to begin on November 19, 2007. The Mercedes-Benz recall number is 2007-100002.

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Mercedes-Benz CLK550 Reviews

This has been a great car for me. Have not had any problems with it since I bought it used in 2010. The convertible top has always worked good as well. I am always getting compliments on what a beautiful car it is. The Mercedes Benz dealership even had it showing in the show room with all the new cars because it was so nice. I had a 2002 black on black corvette before my Benz. It was totaled i...
Having had any real problems with my CLK 550, just a little wear and tear that was under warranty. Great handling, love the power of the engine. Great curb appeal.

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