560 sl door lock problem
 

I have a problem with the drivers side lock. It wont activate any other locks. although locking the from the trunk or passengers side will lock all three locks. When turning key in drivers it offers no resistence unlike the pass side.. I know this has been discussed but i need help. thanks

Check the vacuum lines. The actuator may also need 'help'.

Sounds like you need to remove the handle & see if the locking paddle stick is connected.