Adding Bluetooth to 2007 E350 w/ COMAND

Having the puck would be much nicer I would think. You can use the steering wheel controls to answer the phone and even use the keypad for touch tone responses when making calls. Otherwise I think the aux input would just play music, you wouldn't be able to use the microphone in the car for voice.
https://github.com/UKSFM99/W203-canbus
This is an open source project using an Arduino to give a new life to older mercs. You can control music via Bluetooth using th steering wheel (still need an AUX cable for now though), and even display the track playing on the cars display.
Also I have a menu (long hold phone answer button to activate) that shows various engine metrics on the instrument cluster

If your interested, let me know


