Data Bus on Board Diagnostic Interface -J533-, REMOVING AND INSTALLING: Installing
WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Install in reverse order of removal and note the following:
Only ERA-GLONASS Russia: check the emergency call function. Refer to the appropriate service information