If you've got highline and cruise its quite likely you may already have the correct module, only proper way of checking is to either do a vag com scan, or remove the cowling around the steering wheel and to physically inspect. (unclip the top bit, rotate wheel 90degrees, remove first t20 screw, rotate wheel 180degrees and remove the second one, and the few screws on teh bottom and the lower cowling will be able to be removed. then physically read the full code off the module)
if you don't have a MFSW you will definitely require a new airbag loom because the loom's between MFSW and non-MFSW are completely different.
i found it was quite an 'easy' mod to do, and well worth it in my opinion, only bit i had the garage do was the actual wheel swap because i didnt fancy poking around inside an airbag and i didnt have that fancy 12point bit.
good luck!