I have a 1998 c200 sport which i've just bought, one of its latest issues is that it will not lock or unlock on the fob today?? did yesterday lol. anyway i got the car open with the key, but am unable to lock it, any idea's? the central locking works from the button inside the car but i dont fancy sleeping in it over night. One other thing, i dont know if this would affect the locks but i have got the auto box disconnected electrically as oil had got into the plug connection.