Hey everyone. I have the integrated phone in my 300E and since its major old school and not detachable, I have never bothered to activate it. Ive seen many of the mercedes star tac phones for sale on ebay that are TDMA. From what I can see, the little phone jack connecter that connects the star tac to the car is the same as the one my current phone has. Will the startac work with my existing wiring? Thanks.

Nope. your 300e has a analog phone and the star tac is a tri-band digital phone. every component from the antennea to the booster to the cables are not the correct design.
sorry