OE BMW trailer hitch....
This week while at my local German BMW partner I was thumbing my way thru the accessory 1er book. I was kind of shocked when I came upon a factory BMW trailer hitch for the hatch 1er's. I bet one could make his also work on a coupe(e82)!
Then I started to wonder IF RealOEM would list this trailer hitch... sure enough! Here it is....
http://www.realoem.com/bmw/showparts...96&hg=71&fg=10
Towing hitch, detachable diagram #1 - BMW part number
71606765340
Hope this helps you guys out!
Dackel