WIS 82.62 Speaker, Amplifier, Antenna
Rear Deck/Shelf and Factory Subwoofer Removal
http://www.benzworld.org/forums/w220-s-class/1541633-factory-subwoofer-removal-upgrade-project.html
Antenna System
Replacement Navigation/GPS Antenna - COMAND-APS with MOST
Reference: http://www.benzworld.org/forums/w220-s-class/2000609-less-than-20-usd-gps-antenna.html