Car automatic lock when walk out the car with key in ignition and car running.

Question

What system i can buy to install in my car so that i can have the remote in my pocket and walk out of the car say 5m, and the car will lock all the doors with the key in the ignition and car still running.

Answer 1

This would be called Idle Mode and will require that you lock your doors on your own after getting out and closing the doors.
Both evo-one and evo-all offer idle mode on most cars and would require an RF-KIT in order to activate it since it cannot be activated from the OE remote.