Newbie needs advice

[Lalapalooza66]

Hi everyone,
I have a 2007 s320 cdi. The command screen is showing the message "device unavailable" when the radio, cd, video or phone is selected.
Any ideas as to what the problem is please??

 

[dry run]

Do you have a Harmon Kardon stereo system by any chance?

 

[Lalapalooza66]

Yes I do have a Harmon Kardon system

 

[Lalapalooza66]

Do you have a Harmon Kardon stereo system by any chance?

Yes I do have a Harmon Kardon system

 

[dry run]

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