I agree, there is no reason to think DSP would cause any problem with Nav screen or operation, it must be wiring.

I sent another email to Seicane with all the necessary pictures and clearly asking for what I need to clarify their fix. I won't hear from them until Monday or Tuesday. Not optimistic they will be of any help.

Calling local audio installers today to find someone that is confident they can help.

I am trying to get motivated to work on it this afternoon.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas