Thread: w221 comand mode [hidden menu ?]

I have an s550 (w221) and would like to know how to get into the engineerings mode. On my other MB, E350 W212 I am able to turn bluetooth audio on via this mode. I would like to know the sequence on the buttons to get into this mode.

Because these are rare, I dont think anyone here will have had a good chance to try experiments.

I would try HANGUP, *, 6 for about 10 seconds, and HANGUP, *, #

Let us know how you get on

R