Dropping charge between alternator and battery. Car won't start.

[snapdragon]

Originally Posted by d.f.

One more question: do we have to put an an actual Audi battery on the car and then code it to the computer?

No, any brand will do as long as the charactersitics match the original, which is usually 110Ah or 95Ah. You can use the VAG equavalent part number or the VARTA part number. Y
ou also need to change the serial number in order to reset the accumulated battery data back to that of a new battery.