My 2012 range rover sport was parked up for a month and half and was driven only for a day or two during this time. After i was back from holidays i started and figured out the central locking sysmtem was playing up. It wont lock the car with one click. I had to open and close car for few times before it locked.
i drove it fkr a day for few miles and then parked it over night.
i was unable to unlock it in the morning and key wont work at all. Cant get in to see if this is the battery or something else.
thanks.

 

I just had the same problem yesterday. I am looking for a solution.