The S3 seats dont have a memory function, make sure you get the plugs with the seats it make wiring them up alot easier, you should get air bag plug, electrics plug and heated plug, you will need to get the switches for the heated part and they are £70 -£35 each and the golf ones dont fit, unless you make them fit with alot of messing about (sorry Adam) i have a wiring diagram for the heated seats if your interested PM me and i will send you a copy, the air bags are easy enough you just need to swap the wires around, i cant remember which ones at the moment, i will have a look, its years since i fitted mine. wiring the electrics is easy you just need a live and negative, you can chose between constantly live or just when ignition is on, stock setting is constantly live.