Did you check the fuseable links they are in the lower level of the engine bay fuse box, 60 to 100amp fuses.
 
Or drive over a speed bump at speed, mine has a loose connection (somewhere :rolleyes:) and this jiggles it back to life!
 
If its the lights for the heater control area only, there's only one bulb for the lot. Pull the heater knobs and the fan knob off. Remove the phillips screws behind the knobs and the panel comes off. You can then change the bulb in the middle.
If its the instrument binnacle as well, then its probably a bit more complicated.
 

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