Hi there, I have just bought an A4. I have read about these problems (too late as ive bought the thing!) and they are starting to worry me. My car has a BLB engine. Is it possible that any of these were produced with a direct pump not one with the balancer shaft and chain driven? Or is that only if it has been added at some point by an owner? I just want to get to the bottom of it to see what im going to do. It sounds like the perfect car to have this problem. Its a 2005 s-line 2.0litre TDi  BLB engine. How can I check whether this has a chain/direct driven? Cheers for any help.