This is the Harmon Kardon Subwoofer amplifer for use with the NTG2.5 COMAND system. It is used in the W211 E, CLS, ML, GL and R class. In other NTG2.5 vehicles the amp is part of the sub-woofer. If you are retrofitting Hard Disk COMAND to a car with HK sound system you need to add this amplifier and use the appropriate retrofit harness. (Please note that this is also used in NTG4 cars such as the W204, W212) ** Special order, will take a few days to arrive ** |