Why is my Mercedes leaking oil?
There are several possibilities for causes of an oil leak on your Mercedes. On older models, worn or incorrectly fastened oil pan gaskets can cause oil to leak through. Loose transmission cooler line unions can also cause oil to leak onto the exhaust.
How much does it cost to fix a Mercedes oil leak?
You might think of a leaking oil pan gasket as an annoyance more than anything, but it can lead to devastating consequences if left uncorrected. An oil pan gasket replacement will be from $100 to $400 typically, although unusual configurations can drive that price up much further.
Why is my Mercedes Benz C class leaking oil?
This is part of your Mercedes-Benz’ positive crank case ventilation system. The PCV system captures excess oil vapors, and recirculates those vapors into the intake tract to be burned off cleanly for emissions reasons. When the PCV system fails or begins to collect excess oil vapors, it can begin to leak.
Why is oil leaking from the back of my car?
Another potential cause for an oil leak, especially coming from the passenger’s side of the car, is leaking around the cambox covers, the cam bore blanks and covers on the back of the cylinder heads. Oil around these parts sometimes leak onto the exhausts or manifolds. Tighten the covers for an easy fix. Figure 2.
Where are the oil plugs on a Mercedes C class?
If the cam covers have a good seal and there is no weeping or leaks, it’s time to move on to the next step. If you have a M272 or 273 engine, it might be the expansion plugs that are leaking oil. These are made of plastic and are located on the back of the cylinder heads.
What to do if your oil pan gasket leaks?
Use your flashlight to find and pinpoint the source of the leak. The oil pan gasket may leak, especially on older, higher-mileage C-Class w204s. It could be that after your last oil change, the technician did not tighten the fasteners that hold the gasket and oil pan onto the car.