CarHopper

It's a known issue, but the one thing that MB hasn't stepped up for. Sorry I didn't sugar coat it.

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.

Mr. Lin

15 minutes and all the coolant was gone? that had to be a rather large gap, but if your engine shut down because of it, that makes sense. you didn't notice any white smoke?

Gary Maranjyan

Whats up boys? Quick question, I'm too worried because I got the check coolant level on my 2012 c63 eiditon 1, but my engine number tells me I am not in the affected group for bad head bolts, should I still worry? Kinda ruined my whole day and I think im iverthinking.

BLKROKT

You have a FL car so no headbolt issue. Coolant contracts/expands with changes in season. Just top off the overfill tank with some distilled water or Redline Diesel WaterWetter.

Gary Maranjyan

Thank you brother, made my day!

ecohen2

I would check the cap as well especially you see any white near or on the tank... We have 4 Mercedes including my C63 and all of them have the exact same issue with the cap.. You can try the following:

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

Gary Maranjyan

Thanks, will do. Ill get back to you guys.