I own a 2015 Up! (Take) whose Central Locking System appears to have developed a fault. I can no longer unlock the passenger door by pressing the unlock button on the driver's door ; I have to do it manually. I first noticed this a day or so after I had reconnected the battery. (The car was parked up for seven weeks with the battery disconnected.) This may be coincidence or connected to the fault in some way. Thanks in advance to anyone who has any ideas on this and takes the trouble to reply.