I have moved mine from the ashtray to the drinks compartment which is never used. I was fed up of having the ashtray open all the time and now can hide my iPod under the sliding tray except when it's being charged.

I've had to drill a small hole in the 'lobster claw' pen holder but that can be replaced.

Best (only) mod I've done so far!

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X5 4.8is
320d sport touring