Rear Doors Locking/unlocking

[dajaja]

Hi All,

When approaching the car to unlock the doors, the rear right door will not unlock. whereas all the other doors unlock.

Furthermore, as a standard you get 2 beeps when doors unlock, im now getting around 6-8 beeps when unlocking the doors.

im guessing this is a warning indication that there is an issue with the central locking system?

can this be easily fixed or should i just wait a few months till my next service?

Thanks