Relating to a 1996 S320;

Someone said the raidio antenna is located in the bumper and the antenna that rises from the rear fender is actually for the factory installed phone. Is this correct?

I believe the shifter indicates that there is a seperate gate or at least some kind of switch to go between 4 and D but I don't feel a click nor any change in engine rpms. What is the function of the place marked 4<>D?