No surprise my front suspension needs an overhaul. Looking around I see you can get loads of cheap arm kits for the A4, but nowt really for the S4. Does anyone know the differences between the arms on the 2 cars? Can I at least use some of the arms from the A4 kits? I've read that the difference between a A4 & S4 is the style of tie rod end & the upper control arm bushings. If none of these are interchangeable where's the cheapest place to get S4 kits from?