kraut2

Hey all - picked up a 2012 C63 a few months back. 30k miles Immaculate and all service done at the dealer. Last week I tracked it and on the second lap, it went into Limp home mode. It was hot (about 100 degrees) but the thermostat did not show it was hot. No CEL. We checked for codes and nothing. Drove the car home 300 miles and everything was fine. Next day, driving leisurely and suddenly I get a major misfire.

Put the Carsoft on it and got the following:

- 0485 Cooling Fan Power/ground circuit malfunction
- 0629 misfire
-0641 cylinder 4 misfire
- 0653 cylinder 3 misfire
- 0633 cylinder 1 misfire
-1200 position exhaust cam bank 1

Do these suggest a thermo sensor and an O2 sensor? Are they related or is this just coincidental? Thoughts and suggestions appreciated

kraut2

Over 100 views and no one has any suggestions?

Adi-Benz

Sometimes it's more complicated than the general forum users can help right away. Especially if many have not experienced it. Help will come.

whoover

I would guess camshaft position sensor, but that's just a guess. They do fail and a hot run could have put a marginal one over the top.

kraut2

Thanks. Cleared the codes and will see what happens. If they reappear, I will change the sensor. Easy cheap fix. Too bad you can't swap left and right.