^ Correct. What I suggest is getting a kit such as the M Mobility kit (found
HERE) or going a head and getting the BMW Emergency Wheel and having their local tire shop put a narrow tire on it. One thing to keep in mind is you're going to need new lugs for the space saver/spare/emergency wheel, it uses different length lugs that the stock wheels on your X5.
HERE is a link to a custom cart with the wheel and proper lugs dropped into it for your.
