Central locking

[black benz]

The rear right hand side door lock doesnt open or close along with the other doors.The central locking works for all the other doors and the boot lid but not this door. Ive been told that there are some sort of valves under the back seats. Could any one please help me. My car is a 190e 2.6 right hand drive.cheers[:(]

[spanners]

There is a vacuum cell inside each door. It sounds like the one inside that door has failed.

I don't think they cost much and once the door panel is off, they are easy to remove and replace.