Just thought I would share my most recent upgrade to my 2012 B8.5 A5 Coupe.
managed to find an RS5 grey boot lid with integrated spoiler form a breakers yard.
Got the boot lid, liner and spoiler module for £280
Frustratingly they had chopped the wires near the module so bought the connector from eBay. Along with the centre console spoiler switch and finally the electrical plug for that switch.
installing the boot lid was quite simple requiring very little adjustment.
wired and spliced in where necessary
after getting two quotes at nearly £1K to paint the boot lid I decided to do it myself with rattle cans. I sanded it down.. well keyed up the surface - primed it, painted and lacquered it. Followed by plenty of sanding and polishing.
Coded the spoiler to the car with an OBDEleven - what an awesome tool that is!!
Gotta say.. I really like the end result.
Comes up and down automatically at the relevant speeds too.