Battery Interrupt Igniter, Removing And Installing: Installing
WARNING: This page is about a different car, the 2024 Audi S6 and 2024 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Install in reverse order of removal while noting the following:
Conditions
Make sure the connectors are pushed in all the way and that they engage audibly.