(a) No person driving or in charge of a motor vehicle shall permit it to stand unattended without first stopping the engine, locking the ignition, removing the key from the ignition, effectively setting the brake thereon and, when standing upon any grade, turning the front wheels to the curb or side of the highway.

(b) For the purpose of this section, unattended shall not be construed to mean a motor vehicle with an engine that has been activated by a remote starter system, when the motor vehicle is locked and when the ignition keys are not in the motor vehicle.