I am new to vwvortex, am not too technical, and could not find another post discussing my problem. 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 it was not firing on all 8 cylinders. My local tech, said that it was probably caused by the cam adjustor, but to confirm he would have to pull the whole engine and quoted $4-6K estimate. Not sure to fix or get another ride. Any ideas or suggestions? Thanks!