Hi all, I have a 2000 A3 T-Sport Quattro. When I go on a journey of more than 15 minutes the traction control warning light comes on and stays on until I swith the ignition off. It then doesnt come back on until another journey lasts at least 15 minutes! It doesnt flash it just stays lit up. Any ideas? Could it be a serious problem? Car still seems to drive normally!