Adding video input for W212's Audio 20

[user00021]

Hi everyone ...
Looking forward to adding video input to the 5" Audio 20 HU using something like that http://car-solutions.com/en/car-video-interface-for-mercedes-benz-w212-w204-w221.php.
Some questions I have:

• How do I remove the display bezel? Where are the latches, how should I pull it, etc.
• Are there any + batt, GND, CAN high/low terminals behind the dash? I'd rather not hotwire it stripping the insulation.

Thanks.