Hi,
I have a w124 T 250 D from 1988. At the moment i have some problems with the central locking system.
The central locking system is connected together with comfort electronics (closing all the windows) and a non MB alarm system. This setup worked fine for several years now. i used the alarm system remote controller to close/open the doors. There is a central switch too on the middle consol to operate the central locking from inside. The two front doors are keyless only the tailgate has key.
Recently the automatic window closing stopped working then a bit later after closing the car the opening worked only after several try (pushing the remote contorller several times). Changed the battery in the remote controller, symptoms did not change. Now the central locking does not work at all, nor the inside swith on the middle consoll.
If i push the "buttons" on the front doors, system works, pump closes the other doors. If i open the closed doors from inside all other doors open too. However the tailgate key closes only the tailgate but the pump does not operate. Pushing the button on the tailgate also does not close the other doors. Checked Fuse C: ok.
I would like to ask anyones opinion what else to check before i would buy new relays or other parts.
thanks
Andy