My '07 Eos has just over 91,000 miles on it and about a week ago my check engine light came on. Took it in Monday, dealership garage says fault codes show engine is misfiring. They look at the engine and there is a bad carbon buildup, which they will clean (for $660). I get a loaner for a couple days, they call back and say that the carbon buildup is so severe that a portion of the engine would have to be sent out to another company for an "acid bath". That, with some other items, would cost about $3,500.
This is a car that has been driven primarily highway miles, always had premium gas, and has had every recommended scheduled maintenance. When I asked why the carbon buildup occurred he had no explanation, just that fuel can build up deposits. When I asked if I did spend the $3,500, would the problem come back, he said he couldn't guarantee it wouldn't.
I had them do the cleaning they could do (for $700) and picked up my car. Now, according to them, "it's just a matter of time" before I run into trouble. I've loved driving my Eos for 4 years, but now I'm seriously considering trading it in very soon. This was my first VW and I think it will be my last. Have any of you heard of this problem? Any advice? Thanks!