Chris, you can open the top (but not close it) on European cars with the key fob. In some counties you need to unlock the car before you can open the boot with the key not sure if the UK is one - think there is something in the handbook about this. To be able to close the top or partially open the boot for access with the key fob you need to have an optional extra called "comfort access" fitted to your car. You can get a third party accessory fitted that will allow you to do all that you want but it is quite expensive. BMW will also frown on this at service time and may void your warranty.