Mr C. thanks again for producing this how to guide. It's been put to good use over the week end. I've used a slightly different install method but essentially its the same just the screen and microphone placement are different.
I can't say for earlier 4200's but for the facelift model you can if your careful just remove the drivers side allen key bolt and slacken the passenger side bolt the holds the lower part of the arm rest in place. This gives you enough wiggle room when running the cables and installing the parrot control box.
The finished article looks like this :-
I also installed a sat nav antenna at the same time below the central air vent. Velcro tape was used to fix this into place.
I then ran the cable for the screen and the sat nav antenna under the dash past a gap at the side of the binnacle and the down to the left of the steering wheel. There is a hole with some form of flexible trim cover under the dash to the far left of the drivers side. I fed both cables through there and tucked them under the transmission tunnel trim. The microphone is positioned near the steering wheel and the cable follows the same route as the others.
Microphone is attached using the trim clip provided in the kit. The screen is mounted using a Unibond / No more nails removable strip that is trimmed to size and then a sharpie pen is used to colour the edge of the foam strip black prior to sticking down.
I also used the no more nails strips to attach the parrot control box to the inside of the arm rest. I will at some point make a screen support mount to attach between the air vent and the sticky pads on the back of the screen cable.
Something to note on the latest MKI9200 V3 kits. The aux cable supplied is now a USB and phono mini line in only. No Ipod connector if you should need that option but you can stream direct to the parrot.