Yep - HR Weight distribution hitch and Tekonsha brake controller for me. Installed the controller myself using these great instructions http://www.bmwmotorsports.org/pdf/BM...er%20Brake.pdf on X5World.
I only have one towing complaint - the clearance lights on my caravan appear to consume too much power so they all flash off and on every few seconds. I removed some of the bulbs and it is OK - but maybe not legal.
Total of 16 lights (4 front 4 back 3 each side + 2 license plate) each 10 watts = 160W consumption. 12 lights seems to be OK. Havent had this problem with other vehicles. May have to replace some of the bulbs with LEDs.

Great for towing otherwise. You'll never know whether you should have installed a brake controller and weight hitch until an emergency and things go pear shaped. Given the cost of the car I cant see why you wouldnt install them for larger loads.
My 2c.
DS

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