Hi, I'm about to trade in my Monte, could anyone tell me how to delete the phone numbers which are stored please?

 

There is a factory reset option somewhere, have a look in your manual or online manual. If you use the online stereo manual you can search for reset 😎 although it's probably under car then settings somewhere.

All done.  Press "set-up" button on the top right  of the unit, then "Factory Settings".  Scroll down to "Telephone", and there it gives you the option to "Reset", press that and the phone and all its save numbers are deleted from the car.  Jobs a goodun.