Not got an 09 but sure ive read cruise is just a matter of fitting stalk and code. Rear camera is easy job but a fiddle. Contact this guy camera comes with parameters already coded without lines can be out of sink.
Contact and ask for your car. Plug and play just routing cables and coding.
https://www.ebay.co.uk/itm/New-Original-Audi-A5-S5-RS5-8W-Q5-SQ5-Rear-View-Camera-8W8827566D-Rfk-Camera-Set/273931736334?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
If your not happy doing your own contact Richard at www.p-d-r.co.uk not all shows on his site but he knows everything.
Need the 10 digit code if you dont have (s/h car) you need to contact your audi garage to buy. Im in process of getting mine, contacted audi uk and they say you have to go to dealers to sort out. Phoned dealer and they want me to go in. What a faff to get a code 😞
Dynamic mirrors, rear camera if not fitted. (not hard just fiddly)
I got rid of auto start stop as well, wanted option to switch back so did it with cable rather than coding