might sound like a real dum ar$e question, and I'm 99% certain I know where it'll fit, just wanna make sure...

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=001&item=110012493580&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

thats the ebay listing I'm looking at, I'm pretty sure it'll fit in the slot just above the cigarette lighter panel, or put another way, underneath the A/C control panel.

I can't see anywhere else it'll go, I thought maybe in the centre armrest ?

My 530d was a Police car, so I do have a missing trim under the AC unit so thought this would plug it nicely.

sorry for sounding dum again!

Dennis! West London UK!!