After reading all your posts - Did you already have a look if the interior is similar to the A4 or the A6 or the A8? These are the main models and usually the dash in the S4 is the same (except some additional items) as the dash in the A4. The Audi "allroad" doesn't say anything to me. I don't think the type is "allroad". Is this "allroad" the A6 avant with four wheel drive? Then just have a look for some installation hints on the A6. I'm sure the dash is the same.

TeeMcBee
Got my Mk2! # 080000143