No problems, will do it tomorrow as it's a bit dark outside right now

The Westfalia sticker came with the kit. I think it's just about putting the latch onto the holder correctly. As for the tyre inspection, I don't think this is a BMW thing, just something that was put on by a dealer when they last checked the tyre (wear/pressure) during a service.

I love the Westfalia kit. It looks no different to a standard X5 without the ball fitted and the fact that the X5 comes with the pop-out panel in the rear bumper as standard just makes it even better!

Just to answer a few more question in the thread, the electronics box does indeed adjust the car's settings when towing; it ensures that the car can handle a weave caused by a trailer by applying the correct adjustments to the DSC. It also disables the rear PDCs when a trailer is connected and it also makes the car moan constantly that the trailer brake lights are out ... or maybe that's just my crappy trailer