I am looking to buy a MKIII for $3,000. It has a minor knock, now, and it sounds like just a bearing in the wrong spot. I think I'll be able to get him down to $2,700. So my two questions are how easy would it to change the main bearings and is it worth the buy? The car is completely stock, turbo is in good condition, no error codes, 160,000 miles, body is next to mint, the horrible red interior, R154 tranny, and there seems to be no other problems. Lemme know what ya'll think...