There is something called a security code on the BMW X5. You can program the security code for one time use. It is something the car owner programs. This is a security feature that can be used to prevent someone from stealing your car when you are in a less than desirable neighborhood for instance. It is reset everytime. You can find the option on your menu screen. It says code. In my Computer/Navigation user manual, the code information is on page 69. You can also find the manual under Navigator on the X5world front page.

Good luck!

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Abster641