Do not leave the key in the ignition!

[Bremer Speck]

Last night, after having parked the Smart in the garage and after switching off the engine, for no particular reason, I left the key in the ignition. This morning, I found the car completely locked. Good thing, the spare key was in the house. I would have thought that the auto locking feature works only when the transmission is engaged and the car is running. Not so.

[Dave777]

Interesting. I'm going to have to review the manual. So far I've left the key in the car numerous times, including for a number of hours, and have not had this happen.

[smartcenterSeattle]

I’m looking into this as well. Is your vehicle equipped with the factory alarm option?

[SmartBob]

The kids did it.

[Connelly]

I have the factory alarm system and have had the car automatically set the alarm (as I found out the hard way) without the key in the ignition, but I don't remember it locking the doors.

[Bremer Speck]

We have the Passion Cabriolet with factory alarm.

[august8pm]

Originally Posted by Dave777

Interesting. I'm going to have to review the manual. So far I've left the key in the car numerous times, including for a number of hours, and have not had this happen.

I didn't realize people could still do that and have a car to come back to. Nice to hear, actually.

[parnami]

Somebody had posted earlier that it, virtually, was impossible to lock your key in the car..thus negating the need of keeping a spare key in my wallet. I WAS happy with that response. NOW, I'm not! BACK TO NEEDING A BACKUP KEY TO UNLOCK THE DOOR!

[the_dude]

From the manual:

Auto-relock function
The vehicle will lock again automatically within
approximately 60 seconds of unlocking with
the key if neither the driver’s nor passenger
door is opened.

! To prevent an inadvertent lockout, never
leave your key lying in the vehicle.

[meaux61]

Odd....My Toyota will NOT lock if there is a key in the vehicle (on the seat...in the ignition). You would think that MB could get that bit of technology right.