I am looking for the navigation module that goes in the trunk of the mercedes e350. Anyone know the part no. Different dealers have given different part nos. Anyone know where I can find out the correct part no., or know where I may be able to find one. Prices at the dealer are crazy.

Try www.buymbparts.com they are one of the best places that I have found for MB parts. If you do not find it in the online catalog call or IM them and they will find the part for you.