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Don't know if the factory one can easily be retrofitted, but it is nice (and expensive). It has a motor on it to move it around to make it easier to get a trailer hooked up and, it has sensors in it that adjust the braking system based on how the trailer is reacting. It doesn't show up in the US option list, so not sure if it is easily available or if there are any structural differences. It probably would require adding a wiring harness, and maybe software updates, which may not be compatible with the US version. I've not looked underneath to see if there are mounting provisions for it built-in, or if it is a special bracket normally installed during manufacture. A generic hitch could probably be added, though. Really mess up a rear-ender, though.
Do you currently have the BMW roof rack? If so, how do you like it?
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