Hi I have a Vauxhall Meriva that has an issue with the central locking. It works on the fob but when I try to open the drivers door the central locking activates and all the doors lock so I have to do it manually with the key in the drivers door lock until I have swtiched the ignition on and then the doors stay open. To limit being locked out I have to carry the spare key at all times. Anyone got any ideas???