technically bmw's don't pull trailers hahah... as long as you have a foot on the break you will be able to back it in. what i do is double foot it. I put enough break for the car to know that I am still in the car with the door open and then back it in.

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2012 X5 50i ZAP(2VA, 336, 465), ZTP, ZPP, ZPS(6VC), ZCW, ZRC, 322, 4UB, 4NC, 610
2011 ///M3 Silverstone II
2011 X5 50i(lemon)
-- SOLD --
08 550 Msport
07 X5 4.8I sport
04 545i sport
02 4.4i sport
01 540I M/sport
00 SL500
97 SL500