access the engineering menu in the command unit of 2009 E350 (US model)
#1
access the engineering menu in the command unit of 2009 E350 (US model)
Could you tell me how to access the engineering menu in the command unit of 2009 E350 (US model), please? I tried “hang-up + # + 1” combination. That didn’t work. BTW, is there a specific key position (off, 1, or 2) to do that? I would like to make my command unit capable of playing music via Bluetooth. When I try it, it is connecting, but immediately disconnecting with in a fraction of a second. I read about the engineering menu in another forum. Thanks for your help.