How do you lock the drivers door of a 1985 380sl?

To lock the driver's door of a 1985 Mercedes-Benz 380SL, you can use the key to turn the lock mechanism located on the door handle. Alternatively, you can pull up the interior door lock button to secure the door from the inside before closing it. If equipped, using the central locking system can also lock the driver's door along with the other doors. Always ensure the door is fully closed before attempting to lock it.