Everywhere there is a seam on your engine, there is the potential for an oil leak. This is prevented through the use of gaskets and seals.
One such seals that prevents oil leaks is the Cylinder Head Cover Oil Seal. Since this seal is made of rubber it has a tendency to become brittle, crack and start to leak due to its constant exposure to heat and engine oil.
Replace your failed Cylinder Head Cover Oil Seal with a brand new one and get your Mercedes-Benz back on the road, free from oil leaks.