Hi - I just bought an old (2001) Audi A3. The central locking key fob doesn't work, which I can live with, but when I turn the key in the driver's door lock it only opens the driver's door.I then have to open and lock the other doors with the button on the driver's door. After setting the alarm off accidentally, I had a diagnostic which came up with an 'electrical fault' in the drivers door. Has anyone any idea of what this problem is and how it may be corrected. Thanks!