There have been a few members who have installed it in their ashtray area where there's a hole for the pen and some have also installed it inside the arm rest compartment. I am also trying to do this install as well. But will definitely try to see if I can put it in the ashtray area.

I too am looking for a write up as well

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'04 BMW X5 3.0i TitanSilber Metallic
'03 Lexus GX470 Black Onyx
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'03 BMW X5 3.0i Black Sapphire SOLD