On mine BMW 116i, E87, 2005. I am having a central lock-up / unlock system failure (using either a key or a remote control) so here are some facts:
-The key locks-up and unlocks only the driver's door.
-Central lock-up switch in the booth locks-up and unlocks all the doors and the trunk but does not lock petrol plug cover.
-If I mechanically pull the shutter for locking-up petrol plug cover, then unlock with the central lock-up switch in the booth, shutter retracts (unlocks petrol plug cover).
-Neither of the remote controls (telecontrols) work.
-Computer check of the vehicle does not recognize any defect.
-Tester in the authorized service does not recognize any defect.
-Authorized service have tried to alter the remote control receiving circuit – no positive result.
-Authorized service have reprogrammed CPU – no positive result.
What shall I do??