I may have a solution for your situation, but we do not offer a ball mount with an accessory receiver for 1-1/4 inch trailer hitches. These types of ball mounts are only available for 2 inch trailer hitches.
Instead, I recommend looking into a roof mount or trunk mount bike rack for your bikes. If you can tell me the year, make and model of your vehicle, I would be happy to make a more specific recommendation for your setup.
I have also attached links to our roof mount and trunk mount... view full answer...
Since there is only the one hitch offered for your 2002 Audi S4 Avant, Curt Class I hitch # C11169, you do not have to worry about options! You are correct that this hitch, somewhat uniquely, mounts to the car's trunk pan and body. Most hitches attach directly to a vehicle's frame rails, its strongest part, but since that access is not available on your car hitch designers had to find other places to mount it.
Curt's requirement for using a support strap # 18050 is not limited to this... view full answer...
Yes, the part numbers you listed are everything you will need to install the Inno square bar roof rack on your 2000 Audi S4. The 46 inch Square Load Bars, # INB117, the foot pack, # INSUT, and the fit kit, # INK149, make up the entire roof rack.
The only additional items that you may need are roof mounted accessories. If you are interested in adding a roof bike rack, kayak carrier or cargo box, I would be happy to recommend a product for your needs. I've also attached links to our roof... view full answer...