How to Lock SmartCar with Disconnected Battery

SmartCar has a curious design. There is no way to lock the car without using electricity. The key is a standard remote control one that can be used to lock, unlock, or open the trunk gate. Like all other cars, you can insert the key into the hole and unlock the car without pressing the button. But the reverse is not true. There is only one way to lock the car: get out, close the car, and press the button.

This is no a problem unless you, like me, is car-sitting for a friend. After a prolong inactivity, the battery drained. This is kind of annoying. The solution is simple: disconnect the battery. But I then cannot lock the car.

Finally, I figured it out.

1. Uncover the passenger side carpet. Loosened one screw from the battery. Keep it connected. Close the passenger side door.
2. Enter the car from driver’s side.
3. Leave the door open. This is important. It does not work otherwise.
4. Insert the key, turn the car on, but don’t start the engine
5. Press the button on the dashboard that look like a closed padlock. It should start flashing.
6. Remove the car key. The doors should lock as you do so.
7. Disconnect the battery. Yes, reach over, yank the cable.
8. Exit the car. Close the door.

Why is this one called “SmartCar?” I have no idea what those German engineers were thinking. Wouldn’t it be much easier to lock it with a simple turn of the key, like every other cars?