Anyone know what this button does? It lights up when i press it but doesnt seem to do much 

I'd suggest the JPNZ owners manual, very useful for finding out what many functions and buttons are!

Often available on ebay.

Can't help with that button, I don't have it.

 

Also - what year is yours actually?

Your question says 2014, but your tag says 2002-2008, it will make a big difference!

Cheers,

Nev

Edited November 1Nov 1 by BigNev

Hey Gaz, it's an air purifying system. The common ones are under the radio near the heating control buttons. 

 

I've seen these in other Japanese cars. They clean the air in the cab when you have the blower on.

Its the same tech you can get in Phillips hairdryers.

It is part of the climate control, and controls the ioniser.

Helps to remove pollutants/pollen.