Mercedes Benz

I want to install new leather seats in my mercedes.i want to install an in-dash navigation system. where do i buy them and how much? i also want to put chrome rims, its a pretty small car http://graphics.boston.com/cars/images/reviews/2002/mercedes_benz_c230_kompressor2.jpghttp://ppgmedia.canadatrader.com/ppgphotos/bs2005510103035/bs2005510103035_20058614148692.jpgwould 19 or 20 inch chrome rims work on it?what else can i add to make it look really nice?p.s if i buy all the stuff that im going to add on it, how much will it cost to pay the mechanic to put the stuff in my car?

What i would do is cut a hole in the muffler so it sounds like one of those tiny little cars that make all the noise and go nowhere.. i think the chicks like that stuff too..! ! nice luck