Can't enable AUX in engineering menu
I upgraded my stereo from the Audio 20 to the flip up screen with navi. It has the PCMIA slot in the front.
Everything works great except I can't access AUX. In the engineering menu the AUX is grey and skips over it so I can't enable it.
Anyone experience anything similar? What are my options




Go to MB dealers and ask for latest "head unit FIRM WARE" to be installed in your car I cannot guarantee but think this is your only avenue and best possible chance to get this activated.
Maps is not included in this that is another cd.
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I switched the Video AUX back and forth between on & off, and nothing gets me the Audio AUX.
Rick
Last edited by Ricky190; Dec 15, 2018 at 05:26 PM.
I have had a similar problem with aux being greyed out. I went into the engineering menu and selected MOST to off. This enables the aux, at least for my issue, which was installing an android screen instead of flip up ntg4 screen. Hope this helps. Let me know how you get on.

MB cars by nature are far less DIY than VWs but people always try to help when possible.
I have had a similar problem with aux being greyed out. I went into the engineering menu and selected MOST to off. This enables the aux, at least for my issue, which was installing an android screen instead of flip up ntg4 screen. Hope this helps. Let
me know how you get on.






