Coding: Module 09 -> Adaptation -> "Acknowledgement Signals" -> Enable "Akustische Rueckmeldung entriegeln/verriegeln".
If you have LED tail lights, this offsets the inner and outer turn signal timing for a "chasing" effect. audi+a3+8v+coding+list
Coding: Module 52 (Passenger Door) -> Coding -> Byte 4 -> Enable Bit 2 and 3. Coding: Module 09 -> Adaptation -> "Acknowledgement Signals"
The passenger side mirror tilts down when in reverse to help see the curb (requires the mirror switch to be in the "R" position). audi+a3+8v+coding+list
Change the number of flashes (usually 3) to 4 or 5 when you tap the indicator stalk.