Thanks ngcreese for that clarification.

I have one follow up question for you experts about the little ball in the BMW tray: does the standard Garmin Nuvi clip snap on to it pretty tight? I am asking because on one of the other forums it seems someone had to mod the round hole on their clip to get a tight fit. And I am talking about the clip which looks like this form the side:
/
/
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| [<--- Round hole not shown]
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\
\

BTW, tt appears that getbmwparts.com has stopped selling the tray (GPS Install Kit 65900445996). I'll probably be getting it from pelicanparts.

TIA!