If you have an current A or B class with the Audio-5 head unit and want to install the latest Audio-20 with built-in bluetooth or the Hard Disk COMAND system then you need this kit which consists of wiring, bluetooth antenna, FM/AM adapter, a Microphone and a new dash-board panel. You will still need a GPS antenna if installing COMAND.

This is for the NTG2.5 systems (i.e those with the built in bluetooth phone system introduced in late 2008/2009).

Please note the photo shows the wrong wiring adapters, a new photo will be added soon.