cmclernon:
Hi Ricky,
Was thinking of one of these too - did you buy locally or of the
web?? I see a facia adapter is needed, what about wiring - I'd imagine
it needs the quadlock adapter??
If you don't mind me asking, how much did it cost you fitted?
Cheers,
Colm
asy:
Hi ricky i phoned my local car audio shop, Uplands in cardiff to
buy one of these and he said i'm gonna need £80 worth of parts besides
the unit
he reckons u need a fascia so it fits properly wiring loom and some
adapter i thought it was a straight swap any advice is appreciated..
Oh and £50 to fit it so all in it'll cost over 500 notes 
Hi guys. I bought my HU through amazon.co.uk from Car audio & security for £360.
For the mk5 golf you do need a fascia adapter. I got mine off ebay for £12.
You can use a normal quadlock - iso adapter (around a tenner) but you have to tap into sidelight switch to get a switched live. Because i didn't want to do this, i bought a connects2 CTSVW002 CAN-BUS adapter, again off ebay. It provides switched live, dimming of headunit with lights, reverse gear signal for camera, and steering wheel control (with additional lead). Got this for £29 off ebay.
I also needed an aerial adapter - originally i got an autoleads PC5-136 for £7 off ebay but this gave me crap reception, so i changed it for a twin fakra - iso aerial adapter (AAN2124 made by Celsusice) which cost me the massive sum of 99p from ... yes you've guessed it - ebay!
I fitted the unit myself so all in cost me around £430 including delivery of everthing.
If you have any technical ability at all, i would recommend fitting the unit yourself - its quite easy actually.