I am a new member to Audiforums, not too technical, and could not find a post related to my question. My 2007 A6 4.2 has 108,000 miles and has been well-maintained. Recently, all of a sudden, it started running really rough, as if all 8 cylinders were not firing. My local tech said that it is probably the cam adjustor, but that he would have to pull out motor to confirm and quoted me $4-6K to fix. I could tow 100 miles to dealer to validate. Any ideas or suggestions? Thanks!

 

If you're talking about the cam chain tensioner, then yeah he's likely right. The B6 S4 guys face the same problem and in that car it also requires pulling the engine to replace them.

 

Thanks ImTheDevil!