had a warning message ignite - calling out that a tail light bulb was out. the audi manual instructs owners to take the car to the dealer to replace bulbs???
just a quick tip - the process is different from a standard s4, access to the "release screw" is in a different place, but very easy to find - behind a black plastic "quick release cover. once the screw is loosened , you need to also loosen the black ring that surrounds the screw (which is in the center of the black ring).
in summary the directions on you tube are helpful, but the not a match --- the cab is different ---