Hey all been lurking for a while, I have some questions for you knowledgeable types! I recently bought an A3 quattro (1.8 T 1999 V) - very nice. I'm well pleased with it. Do all quattro's come with ESP as standard? Theres a distinct lack of a button on the dash! If ESP isn't standard is it activated by a button? And is there a big difference between the normal 4wd and 4wd with ESP? IS it true that after stopping the car I should leave the engine on for 30 secs? Something to do with the turbo? Anyone experienced a strange knocking sound? Seems associated with the wheel bearings (at least a mechanic friend of mine told me), but I just wondered if anyone had experienced it on one of theirs. It seems wheel related as it speeds up with the rate of the car. You can slightly feel it as well, so it's not just rattling. As you can guess, I don't know a hell of a lot about cars, I just like driving them and after driving this I thought it was great. Any help is appreciated. cheers!