Here is the manual, got it a while back and seems no recoding is needed.
Received my kit from Schmiedmann the other day, haven't yet had a chance to think about fitting - work is a bit crazy right now.
Anyways, it doesn't look too bad to install, I plan to do this myself. If you want to go the same route I suggest you read up on the other threads on the forum about not unplugging anything else etc. If you did that would mean you need to get the car recoded if you did.
Just need to order the door tweeter pods and make some time. Will try to document my install when it gets done and post it here.
Apologies if my gibberish doesn't make sense, its 6.30 in the morning