Unfortunately, the installation is not really self-explanatory, who has no idea of the matter, should better hire a professional order. Technically gifted self screwdrivers make it but just himself.
TIP: On Parrot.com you can always find the most current diagrams on how to install in your own car (car specific). In color erleichter print the correct connecting extreme (or makes it only really safe to do.
If you understand the instructions and keep in mind - no big deal.
A note yet:
Before starting to disassemble the car, you should look at a MKi 9100 which hardware version you have.
Older displays do not work until 1:31 (if I remember correctly) goes.
The hardware version is the Parrot from Settings.
Operation is a bit strange at first, but that it has been fast.