I would think the harness under the hood for the lights will be the same between M6 and A4 cars. I can't see there being a reason for them to be different. However, I would definitely look for one out of a '98 car.
yeah,! but i found one listed out of a AUTO and i looked at my old v6 harness were it all plugged into. i couldnt see why it wouldnt be universal... well i think wat im gonna do is finish up the car put the body harness in get the motor in make sure everything is hooked up how it should then buy this harness. i mean not much to lose 24 bucks for the underhood harness!!haha and if it dont work might be able to send it back... thanks for the help ill let people know if it works.