Your local Audi dealer should stock or be able to order the Audi bike and ski rack. Although all the hardware on this rack is made by Thule, it has been specially designed for the Audi A4 and fits great without hanging over the car. The rack attaches solidly to the car (without damaging the roof in any way) and can handle the type of fast driving most A4 owners are accustomed to. The rack also allows the sunroof to be opened.

If a Thule wind fairing is added to the rack, it becomes super quiet.

The total cost of this type of setup would be around $325 -- this is for a one bike attachment.