Beneath the cd slot in the factory navigation unit is a row of five buttons:

[NAVI] [ CD ] [FM/AM] [ ] [ TEL ]

Anybody know what the unmarked button, fourth from the left, does?

 

I believe that button is for the TV function which is not available in North America but is available in Europe. Any others input on this? I also contacted Midwest Electronics on this and they seem to agree. They are a Blaupunkt refurbisher.

 

it is the button for the tv receiver on non us models

 

The factory navigation unit is called 'comand'. On my euro comand your unmarked button says [TV] but since my car has no TV tuner the display states "No TV function available" when I press that button.

 

Thanks for the info guys. I wonder if someone with electronics knowledge would be able to wire an 1/8 stereo jack to this as an mp3 aux. Might be ambitious if MB went proprietary with their connections... anybody know what the connection is on the back of the unit?

 

If your comand is factory, you have a 3,5mm stereo aux jack in the left rear in the glovebox!

 

Is that the old phone connection?