hi folks,have got a strange one here,my 1997 a8,4.2 sport,right i start the engine goes through the checks and everything fine,if i select drive and go then everythings fine but if i start the engine do the checks then reverse out of my drive or car park space then select drive to drive off then my abs light comes on and beeps,anyone got any ideas please,also she is fitted with the delta cc radio,could i replace this for a cd.dvd headunit with tv screen anyone know please?as the delta radio seems wider than a standard radio,any help would be great please.