What happens if

[clabcon]

you have the engine running with the key in the ignition and press the lock doors button on the key itself? Anyone done it before

[Kudos]

the doors would lock?
Surely you need to be in it to it, so not a big deal?

[Matt UK]

Yes, the central locking on my e39 would work from the key when it was in the ignition and the engine was running

[Vladimir]

Mine turns into a jet fighter and takes off.

A natty little trick.

[CypherP]

This also works for most vehicles with central remote locking, not just on BMWs