I've just done mine. Parts required below, I did t have to change my slipring as I already had a Rev C fitted and also had the CC fitted.
Coding is required and not all the buttons work. Left side, left and right don't do anything. Maybe o haven't coded it correctly but it's not a big deal (would love to have all buttons working if anyone knows how).
Slipring
1k0 959 653 C
Control Module
1k0 953 549 CH
Cruise control
1k0 953 513 G