Does anyone know the procedure for cleaning the filter for the rear air conditioner on a 2002 Tarago? I know that it is located somewhere behing the panel in the boot on the right hand side, but how do you remove the filter for servicing? I suspect mine is choked with dust as I travel on a lot of dirt roads and whenever the rear cooler is switched on you get a blast of dust through the vents :( :( :( :(