Saltire wrote:From memory, the heater control mounting (white box in your picture) is screwed into the dash from the rear. You need to remove the dash to unscrew it and thus retrieve the bulbs.
If it’s any consolation, mine fell out too; they’re only retained by a couple of flimsy plastic spring clips. When I put my LED bulbs in and stuck the holders back, I used a dab of plastic glue to secure them.
Saltire is correct, the heater control panel is held in by two screws which are inaccessible from the front and the bulb holders are not very secure. I have just completed this job. I had both of the heater lights out and others in the instrument cluster. I also needed access to the immobiliser control unit behind the cluster. There are good instructions on Wikilec and the forum on how to remove the facia. Even with guidance from "Saltire" I struggled at every stage.
First: removing the steering wheel was a major job as I had to get a puller made up by a local metal worker. (From instructions on the forum) Removal required a massive force to shift the wheel even after severely bending the puller.
Second: I broke the indicator switch because I didn't have it in the central position when sliding it out.
Third: The Temperature control link rod comes off when you "push down clip and pull out rod", well not for me it didn't. I couldn't fathom it out at all even after dozens of attempts. My son then unclipped it in seconds and also refitted it for me later
Fourth: Someone had been in the facia before me and damaged the screw heads and some of the captive nuts which rotated when they shouldn't. Working all along in a tight area behind the facia, unable to see what I was doing and cutting my hands on sharp metal and plastic.


Not wanting to repeat the experience I decided to change all the bulbs. I used Long LED's in the heater controls. I also cable tied their wires to the facia to keep them in place.
It took a long time and a lot of patience. So "djwazza68" it may be better to either not use the car in the dark or try to memorise the heater control positions. Good luck!