2007 Mercedes-Benz C350 4MATIC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2007 Mercedes-Benz C350 4MATIC

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2007 Mercedes-Benz C350 4MATIC
$
162
to $
394
2007 Mercedes-Benz C350 4MATIC
$
155
to $
358
2007 Mercedes-Benz C350 4MATIC
$
477
to $
1,293
2007 Mercedes-Benz C350 4MATIC
$
526
to $
1,294
2007 Mercedes-Benz C350 4MATIC
$
202
to $
516

2007 Mercedes-Benz C350 4MATIC Problems

Oil Seepage on Back of the Cylinder Heads

The 2006-2012 Mercedes Benz C350 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.

Check Engine Light and Engine Noise

The engine in the C350 4Matic is known by Mercedes Benz to have issues due to a poorly manufactured gear on the balance shaft (also known as the counter-rotating assembly). Since the balance shaft gear is driven by the timing chain, which keeps the engine rotating synchronously, when it fails, the timing of the engine will change causing:

-Illumination of the Check Engine Light

-Rough Running Conditions

-Stalling

-Loud Rattle or Slapping Noise

-OBD Trouble Code P1200 and P1208

Correction for this issue is replacement of the balance shaft, or balance shaft gear. Replacement of the timing chain and tensioner should be done as well. The Mercedes Benz dealer may cover some or all of the repair cost on select vehicles as a result of a class action settlement.

The Power Steering Fluid Reservoir Leaks

The power steering reservoir designed for the Mercedes Benz C350 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.

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2007 Mercedes-Benz C350 4MATIC Questions

The vehicle hesistates when I shift to reverse. (2 answers)

Whenever the car is shifted from park to reverse there's a noticably long delay before the transmission engages. Then I feel a "thud" and the car moves in reverse. This occurs whether my foot is on the accelerator or not.

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