"Check Coolant Level" - Take to dealer or DIY?
Again though, your initial post was somewhat vauge. Head into the FAQ, dive into the headbokt threads, and then come back.
Scan your car for CELs too.
We're here to help.




1. With the engine cold, remove the cap.
2. Take a damp rag and clean the o-ring that is on the cap. I am not 100% sure why but the o-ring gets crusty residue on it then does not hold pressure.
3. Clean out the entire inside lip where the cap and o-ring go into the tank.
4. Top off the coolant with the correct color/type. If you mix red and green you will destroy your engine and I have no idea if Mercedes kept them the same.
You should not see the problem again unless that o-ring is torn..
Ed





