DVD video for G500
 

I just bought a brand new G500 2006 model. I want to have a DVD video system installed for the second row passengers. I hit a brick wall at the Mercedes dealer as they do not offer any OEM video systems for this limited model. My apprehension is having some 'clerk' at best buy whose two year salary would not even pay for this car, cut into the interior to install such a device.

Advice? (I know, you're going to say do not put one in)
Suggestions?

Well, if you dont want bestbuy to do it, do it yourself.