Great suggestion!

To which I might add...
manually releasing the parking brake and/or putting the X5 in neutral, require the red T-Handle tool stored under the cargo bay floor board. So if that area is full of stuff (e.g. on a trip), you will need to empty ALL of the stuff to get to this tool. So I'd put that Red T-Handle tool somewhere you can quickly access in a pouring rain -- like the driver's seat back pocket.

Funf Dreisig

Edit: Quoted from one of my previous posts...
"The tool that manually releases the parking brake and unlocks the transmission is the same tool -- it is the big red T handle tool under the cargo bay floorboard.

The drawing in the manual is somewhat misleading. To release the parking brake you use the T shaped cut out in one end of the handle to pull up on the chrome end of a cable. It is pretty small and very close to the outside fender. There is however and small white sticker just behind it.

To unlock the tranny you use the same tool but the long end. You pull up JUST the rubber mat in the cup holder area. Pinch the center and pull up. The drivers cup holder area has a round cover that can be unscrewed with the square end of the red tool. Once open, you will see a fitting on the tranny that fits the round section of the red tool a little further up the shaft."
Using this tool is far from intuitive. So it might be a good idea to try it out once when you are not stranded on the side of a dark road during a hail storm