1990 325ic (kids car, they are in Korea for two years and I am car sitting)and the drivers door lock will not lock with the key. I can lock it using the interior door lock/unlock knob and I can unlock it from outside with a key. Passenger side is locked tight and will not unlock with key or interior knob. Trunk will lock and unlock with the key. I replaced fuse #27 but that did not help, I have a Haynes but not a Bentley so I have no way to determine where the relay (if any resides for central locking). I have a ETK andETM but the ETM is new and does not include the E30 wiring diagrams. I suspect and electrcal glitch within the central locking system and any help greatly appreciated. I am at email@example.com
PS: I thought my 1988 750 was tough to diagnose, silly me.