I have the same problem and am also trying to solve it. Did you find out how to fix it?
yes, you need to close drivers door, open passenger door and use central locking button, then close passenger door and use key.
Press the unlock button twice it's been set to unlock drivers first on +2004MY settings are on the central display menu
The BMW 518 central locking relay switch is located beneath the dashboard. The central locking relay switch will be on the drivers side of the dashboard.
in the boot on the drivers side.
Under the drivers seat.
drivers side door
what type of coil is normally used on audible locking systems
The central locking relay is attached to the ECU, fitted behind the right (EU) back passenger side panel.
behind the glove box on passenger side,remove fuse box and central locking fuse is round the back of it.
The fuse for central locking on a Renault Clio is located under the dashboard, near the passenger side. Older models may have the fuse box in the footwell of the car.
By using central locking system of cars, passenger can lock or unlock all the doors of car pressing a button or flipping a switch.
its the locking of the driver and passenger door with the key that operates he alarm. the only way round it is to lock the drivers and passengers doors from reaching in via the back doors or obviously locking the passenger sides before getting out by pushing th pin down then get out of the car and lock the drivers door by reaching in from the rear drivers door.