My heater control panel has no illumination at all on either the panel itself or any of the switches. How easy is it to change the bulbs on these? It's a '53 reg estate in Ambiente trim with Air Con.

Thanks in advance.

The trim around the controls just pulls off, remove by opening the ashtray and grasping the bottom of the trim and pull towards you. IIRC the controls are held in place using torx screws, and the bulbs are accessed from behind.

Pull the fan rotary control off, a pair of pliers and cardboard packing for protection will do the job. You will see the bulb, pull it out by putting a plastic pipe on it or use long nosed pliers but don't break the glass.