Is this on a GTi? with the climatronic system? If so Remove the tray that sits just above the unit, you push it down and pull it away. This'll give you a small amount of room to work with. If that doesn't help, you can pop off the plastic surrounds with a flat head screw driver, then undo the bolts exposed. this should free the face of the system, so you can make any adjustments to the wires behind.
If this isn't a GTi, I think surrounds can still be removed in the same way, but I'm not 100% sure, you'll have to have a ganders.
If they can't do this, you'll have to take the centre console off to get behind it properly. To do this start from the right and work your way over. all bolts are torx bits T20 (I think). It'll go something like this:
remove bolt under light switch (right of steering wheel), remove plastic
remove bolt revealed under this plastic.
remove 3 bolts securing bottom of steering cover (pic below)
remove bolt behind steering plastics.
remove 5 or so bolts across the bottom of plastic, near the pedals. Remove this plastic
remove all bolts revealed
remove bolt down the passenger side footwell
remove bolt exposed when you open the glovebox
Plastic trim underneath coin and drink holder should pop off now
Pop gear gaitor off, and remove the two plastic bolts located in the bottom left and right.
gently slide centre console off, taking care over the handbrake cover.
The ashtray may cause some problems, reach under and unplug it or unscrew the small bolts holding it on.
hope this helps!
