This version has fixed steering wheel, first right door.
ADDED: Trailer hitch – tow bar, blinkers, reverse lights.
In general no errors, only one texture warning.
There is thus at audi model without trailer hitch that i have uploaded before.
Trailer hitch 3d model from google 3DWarehouse
Download Audi A4 Quattro towbar v 1.1 (uploaded.net)