I'm looking into doing this too with the 110 I've just bought. The van is a 6 seater without bulk head. I want to fit the system myself with the minimum cutting and chopping. So I'm thinking decent head unit with good iPod connection and pre-amp connector, better than OEM 4" co-ax to replace what's in the dash, pre-amp and pair of 6x9's mounted in boxes on the ply behind the rear seats, facing forward. The doors don't seem to have enough space to fit 6x9's. Not sure how far I need to go with damping materials and any advice would be appreciated.
This is a good thread that got me thinking beyond just upgrading the head unit and front speakers.
http://www.benzworld.org/forums/v-cl...light=vito+ICE