Do compression and leak-down tests. If the results are good, don't pull the head. If the results are not good, bring up the findings and someone can guide you on how to approach the matter.
Well something in my slushbox linkage isn't quite tight. I was doing about 60mph pacing my buddies C280 and what not.
My hand was on the shifter I accidently dropped into 2nd gear which lasted for about 10-20seconds and I slid out of control(rain).
After that it went downhill. I definetly need a compression and leak down test.
I've learned my lesson though as far as mechanics.
Next time it's going to go in the hands of someone who is knowledgeable about Mercedes.