Audio 50 APS engineering menu issue
I just bought a 2010 w212 E200 and I am trying to access the engineering menu in order to enable BT audio and have some other settings changed. Unfortunately, engineering menu looks nothing like any of the ones described in 99% of posts both on this forum and across google
I do not have any settings to change and I simply got some information and nothing to be changed in any of the submenus, rendering the engineering menu useless. There is a youtube video that shows how the menu looks (not uploaded by myself) :The part number of the HU is 2128700286 - Audio 50 APS
Can someone assist with enabling the original Engineering menu if actually possible ? Do I need a firmware upgrade or downgrade to do this or xentry/star diagnostics in order to unlock it ?
Any help or information is much appreciated as this is really bugging me .


