I am thining about adding a touch screen navi to my Es300 (02), which means I would need to buy a trunk mount 6 disc changer, no big deal right. but I'm not sure how, where, or what IN DASH navi i should buy. I've seen the 02's with the Mark L. navi, so I know I should be able to get the dash part, but where can I find a navi that is compatible with the car. I know you lexperts can help....thanks