I JUST PURCHASE A ZAFIRA MYSELF ABOUT A MONTH AGO AND MY HEATER PANEL LIGHT WAS ALSO NOT WORKING TO FIX IT YOU MUCH TAKE THE ASHTRAP OUT THEN UNDO THE SCREWS OF THE HEATER CONTROL PANEL AND GENTLY PULL THE PANEL OUT BY VIEWING THE REAR OF THE PANEL IN THE MIDDLE JUST BEHIND THE HEATER FAN SPEED KNOB YOU MUST UNCLIP THEELCTRIC SUPPLY TO THE CENTRE KNOB TO GET AT THE SMALL BULB WHICH YOU PULL OUT AND REPLACE ALTHOUGH WHEN I DONE IT THE FAN SPEED CONTROL KNOB CAME OUT AND WHICH IT MAY BE POSSIBLE TO RENEW BULB WITHOUT UNSCREWING THE PANEL ALTOGETHER PROVIDING YOU CAN PULL OUT THE KNOB WITH THE AID OF A SCREWDRIVER AND YOU CAN GET YOUR FINGERS AT HE BULB TO PULL IT OUT OR MAYBE WITH A POINTED NOSE PLIERS.
TONY LLOYD, September 2008