Rear trim panel, rear license plate trim panel, thingy between the tail lights panel?
I like no 3, but I'm going to go with no 2. Thanks.
Here's one listed on ebay:
http://cgi.ebay.com/ebaymotors/BMW-...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
BTW, the US spec version does not have the hole for the rear fog lamp.