In Europe a lot of MB:s from about 93 has fixed Hirschmann antennas as OE, combined for carphone and radio. My shop claims they are superior to motor antennas for FM radio, at half the price. Eventhough they are a lot more expensive than regular fixed antennas, but such have mostly a too tiny foot for the big hole in the MB fender.
In the past I broke my motor antenna several times going out of garages before the automatic door was completely open, since it had this flat "hat" gripping to the doors...
L.