Does anyone know how many different ECU's Were used for the 1997 B5 audi realesed A4's. And Were They differentiated by example; FWD/AT, FWD/MT AWD/AT & AWD/MT. If I could get any info on This it would help alot. I have a 1997 Audi A4 quattro 5speed. And i recently bought a tuned ecu for the exact same setup I am building, and for the exact same year, trans, and drivetrain. I need to know if I need to have the ecu sent out and reflashed for my car.