Rear A/C Display Control Head -E265-, REMOVING AND INSTALLING, "High" A/C SYSTEM, Q5: Installing
WARNING: This page is about a different car, the 2024 Audi A4 allroad. 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:
-- Retrieve the Front A/C Display Control Head -E87- DTC memory and delete the displayed error if necessary. Use the Vehicle Diagnostic Tester.