Thanks guys.
I guess i'm just a dreamer...

I was hoping that since the wiring is already present for the old Benz phone, I could just clip an adapter on the plug that currently goes into the analog phone, into my current cell phone.

Guess the only option is to pull out wires and redo the entire handfree system.

The mercedes once is quite cool as it integrates into your car's speakers, and the mic is built into the mirror.

oh well... Too bad...