Just thought I would add my comments having retrofitted a reversing camera to my Evoque last night.
I have the tech pack with the full set of parking sensors and it is a 2013 model.
In order to make it work I have added a 'video in motion module' which brings up the reversing camera option on the screen when the parking sensors are enabled.
I purchased a Fakra to RCA lead, connected it onto the purple connector on the back of the main screen.
Ran the camera cable over the top of the glove box (there is a channel you can access when the trim for the screen is removed), down the foot well (pull back door seal and a channel will appear) under the trim and brought it out by the fuse box in the boot.
The next part was removing the trim off the boot which with some plastic levers (bought on ebay for £5.00) you can lever off the trim without damaging it (you need to remove the switch if you have a power boot) Start by levering next to the boot catch and work around, once removed, you need to undo a control box (two screws) and then you have access to the four nuts that hold the trim on where the camera fits. You need to lever the boot trim off at both ends but little effort is needed for this. I then fitted the camera and replaced the trim.
You need to run the wire through the waterproof gaiter that the number plate wires go through, this was done by removing the old tape and then incorporating the wire and replacing it with a high quality PVC tape, the gaiter seals around the tape, so it needs to be done carefully.
If you buy a wireless camera then this will save this very painful step, but I wanted to use the cable to maintain the quality of image, but if the wireless one works, then this could be done in about an hour, example of one below.
http://www.ebay.co.uk/itm/Wireless-Car-R...f2b40802e)
The next part took almost half an hour to do, you need to run the cable up the rear window and bring it out through the rubber gaiter and down into the car...i used a flexible plastic rod and threaded this through first (about 3mm diameter), then I used this to pull the cable through, I had to cut the cable as the RCA plug is too wide to fit in the gaiter, my advice is to run a 4 core cable through this, once this is done you can pull off the seal strip which goes around the boot and you have access under the headlining where you can bring the cable through...there is a gap which allows the cable to fall through and feed into the area where the fuses are in the boot.
I soldered my connections and then added heat shrink and added tape over the top...I took a 12 v feed from the 12 v socket (saved breaking into a connection in the boot...interestingly my camera only required a +ve feed...I guess there must be an earth feed through the RCA...but i did not investigate.
The camera works well, I did not take any pictures, but in all it took about 3 hours to do and although it was aftermarket, the picture quality is quite good. I will try and take some photos over the next few days.
It's cost about £200.00 to do (most of that cost is for the Video in Motion, but this meant it worked perfectly with the existing setup)