2012 Mercedes-Benz E550 4MATIC Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2012 Mercedes-Benz E550 4MATIC
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2012 Mercedes-Benz E550 4MATIC ProblemsOil Seepage on Back of the Cylinder Heads
The Mercedes Benz E550 4Matic 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.
High mileage or older vehicles commonly develop leaks from the differential seals and/or cover. Our technicians recommend a complete reseal of the differential unit whenever these leaks are repaired.
2012 Mercedes-Benz E550 4MATIC RecallsPassenger Air Bag Inflator Ruptures During Deployment Spraying Metal Fragments
The passenger frontal air bag inflator may rupture on deployment, causing metal fragments to come through the air bag and injure occupants. Dealers will replace the passenger frontal air bag module free of charge to resolve the concern.