renault master van

[PLIVELY34]

i recently bought a renault master. Thing is there appears to be a rear window demister button. Ok, nothing strange, accept I don't have any rear windows!This van was bought brand new and i cannot see the manufacturer putting this in unless there is a purpose for it. Checked the manual and it says nothing. Anyone any ideas as to what the button might be for? It has exactly the same symbol as a standard rear demister in any car

[sddsddean]

On my Ford Connect the switch with that picture does the rear windows and heated wing mirrors. Like you, I have no rear window, so it just heats the wing mirrors.

[PLIVELY34]

thanks