Hi Philip
A tool kit with a BMW ?? Bit of a worry that they leave out everything but a screw driver and a towing eye !! (screw driver is to pop out the cover for the towing eye)
To be serious as run flats came into play less was needed or put into the boot. As my car has the staggered set up it comes with a small compressor and some tyre goo plus a bicycle type spare but at least I get the Jack. Touches wood I have not had need of them in some 10 years and many tyre changes. Have a look at www.realoem.com to check what boot equipment was available if ordered.
No diff locks that I am aware of but my older X5 is used for light off roading (I shoot and we take the Horses to some out of the way places. I did have the delight of towing a friends Discovery out of the sticky stuff a couple of years back so off road competent but not hard core.
Enjoy
Dave