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.
Procedure
Fig 1: Disconnecting Door Cut-Off Connector
Courtesy of AUDI OF AMERICA, LLC
-- Open the door.
-- Release the connector safety catch in the -direction of the arrow A- and remove the door cut-off connector -1- outward -arrow B-.