Are you sure you want the auto lock feature
If you have had this before and are familiar with it then you are used to it. Personally, I had mine disabled as it was an annoyance. I don't know at what speed it locks on the X3 but on my other BMW it was at like 5 mph or something. Wish you could set it for like 80 or something, just kidding (sort of).
Same with the wolf whistle. Everyone I know has had this disabled so that you only get the visual cue when locking and unlocking the vehicle.