1998 W210 Door lock problems
 

For about the last 3 months, there are times when I hit a bump, or turn with someone in the passenger seat that my doors will unlock and then relock, all in about 1 second. This can happen many times in a day, then go for several days and not happen. Its worse when it is really cold, seems to happen less when warm. Any ideas??

Thanks,

LP

Try disconnecting the central locking switch from the dashboard. If the problem goes away, its a dodgy switch.

i'm inclined to go with PoD's theory as well. simple test #2. tape a dime onto
the door, immediately opposite the door plunger/switch. close door and drive
around and see if this moderates or abates the symptoms. if so, it's that silly
switch. fortunately, it's < $20.

that switch can also manifest itself through lights on, alarm not setting properly
etc.

temperature: theory.... cold contracts metal and the parts have more gap. hot,
it expands and gap between door/jamb is less. ¿¿