[03ML320]

There are only two ways to lock the ML since their is no key hole on the doors.

one is use keyless remote. If you push the lock on the remote inside the car, then put the key inside the car, as soon as you open the driver side door, the car is unlocked. So in this cae, you can't lock the key in the car.

two is use the central door lock. You stop the car, leave the key inside the car, left the car from drive side. Then someone in the backseat(maybe passenger side), open the door (not the drive door), push the central lock button, then shut the door. In this case, the key is locked in the car.

any other ways?