Auto Locking after pulling away

[W202 MAN]

I've noticed for a while now that my auto locking feature isn't working anymore it used to do it after going above 10mph, does anybody have any ideas on whats gone wrong or how to fix it?? thanks :)

[W202 MAN]

I figured read somewhere that you have to turn on the car and then hold the internal lock button on the dash, now it auto locks after passing 10mph :)

[Nelson Lago]

Cool I never knew that. My car always locked but that's good to know