2009 Mercedes-Benz E350 4MATIC Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2009 Mercedes-Benz E350 4MATIC
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2009 Mercedes-Benz E350 4MATIC ProblemsOil Seepage on Back of the Cylinder Heads
The Mercedes Benz E350 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.
The power steering reservoir designed for the Mercedes Benz E350 4Matic commonly leaks power steering fluid causing a screeching sound when turning the steering wheel, especially when the vehicle is stopped. The power steering light may illuminate on the dash for more severe leaks.
This is caused by cracking in the plastic reservoir, or a hardened, brittle seal between the power steering reservoir and power steering pump.
Remediation involves replacing the power steering fluid reservoir, power steering fluid, bleeding the system of air, and replacement of the seal between the reservoir and power steering pump.
When starting the engine after sitting for several hours, a knocking sound may be heard for several seconds. This is a common issue with the 2004-2010 Mercedes Benz E350 4Matic. There are three common problems that can cause this sound to occur:
-Oil pressure building too slowly, allowing for movement between the crankshaft and crankshaft bearings
The remediation for these problems can be crankshaft bearing replacement with correct size, replacement of timing components, or balance shaft replacement.
2009 Mercedes-Benz E350 4MATIC Questionswhy car makes no sound when I turn key and wont start? (1 answer)
changed glove box bulb while car was running car cut off now wont start and esp inoperative show in message center. when I turn key car makes no sound but everything works.
2009 Mercedes-Benz E350 4MATIC RecallsLoad Leveling Rear Suspension Connecting Rod May Fail
On certain station wagon models, a connecting rod for the load leveling rear suspension system may fail. This could result in reduced vehicle control, increasing the risk of a crash. Dealers will inspect and replace the level control connecting rod as necessary to correct this concern.