2009 Mercedes-Benz S550 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2009 Mercedes-Benz S550

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2009 Mercedes-Benz S550
$
304
to $
760
2009 Mercedes-Benz S550
$
181
to $
278
2009 Mercedes-Benz S550
$
477
to $
1,041
2009 Mercedes-Benz S550
$
611
to $
904
2009 Mercedes-Benz S550
$
74
to $
139

2009 Mercedes-Benz S550 Problems

Oil Seepage on Back of the Cylinder Heads

The Mercedes Benz S550 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.

Stalling and/or "Crank no Start" Due to Failed Crankshaft Position Sensor

The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.

Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration

A vibration felt through the center floor of the vehicle can be caused by driveshaft flex discs, which crack and shred, causing excessive driveshaft movement. Not repairing these can cause damage to the driveshaft center support bearing, or, in the worst case scenario, damage to the transmission or differential.

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2009 Mercedes-Benz S550 Recalls

Door Locks May Not Operate As Expected

During production, on fifty-four Mercedes S-Class models, the front and rear door locks may have been mistakenly interchanged. This means that a rear passenger could open the rear door with a simple pull of the interior door handle, and the front passenger could not open by pulling on the interior handle. This situation could affect the safe exiting of the vehicle in a crash or protection against the accidental opening of the rear door by a child. Dealers will inspect the part numbers on all door locks and replace any that are incorrect. The recall began on March 27, 2009. The Mercedes-Benz recall number is 2009030001.

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