What are the common problems with Ford Mondeo's central locking system?

I recently bought a Ford Mondeo and I've noticed that the central locking system has been acting up. Sometimes, it doesn't lock all of the doors or it randomly unlocks on its own. Is this a common issue with Ford Mondeo? What could be the cause and how can I fix it?

I've had the same problem with my Ford Mondeo. It turned out to be a faulty actuator. I replaced it and the central locking system works perfectly now.

It could be a wiring issue. Have a mechanic check the connections and replace any damaged wires if necessary.