A5/S5/RS5 seats should be a straight bolt in. I think you need to alter the wiring tho
Sounds good. What's the wiring for fella? - Does that apply even if they're not heated?
Other than the seat heating (if fitted) then there is the wiring for the airbag and belt tensioner to contend with but that should be fairly straight forward, might have to mod or run some wiring if the new seat comes with electric adjustment though?