Mercedes-Benz CL550 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz CL550

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Mercedes-Benz CL550 Problems

Oil Seepage on Back of the Cylinder Heads

The Mercedes Benz CL550 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.

Transmission May not Shift into Drive Due to Failed Selector Module

The transmission drive selector module may fail resulting in the loss of gear selection capability. In most cases this condition will leave the vehicle stranded and require replacement of the drive selector module.

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Mercedes-Benz CL550 Recalls

Potential Fuel Leak

Due to a manufacturing defect, a crack can develop on the fuel filter when the vehicle is operated in high temperatures. This crack can result in a fuel leak, increasing the risk of a fire. Dealers will replace the fuel filter to correct this concern.

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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