What a pisser.

I heard those clicking sounds when I tried a Soundgate AUXBMW in an X5, and I think when I tried an LC6 (although I didn't try a lot with the LC6 to get rid of it).

I would try making a set of shorting plugs and inserting them into the input of the GLI and leaving the output connected and see if you still have the noise. If you do, those transformers are picking it up out of the air. Maybe you can relocate it?

If you don't, then I would try using just the (+) and try that (as a guess...)

Lemme think on this one... it sounds like something in your car is a bad actor relative to other X5s...

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