It means that the battery in your remote control key needs changing. Look in your handbook, dead easy to do. Undo the screw, unclip the casing using a coin at the ring. CR2016 battery. Don't lose the chip out of the key.
If the remote control does not work after changing the battery, reprogramme the remote control thus:-
Switch off the ignition.
Switch the ignition on again.
Press button A (the larger button).
Switch off the ignition and remove the remote control key from the ignition lock.
The remote control will work again.
Chicks Fan, November 2010