Centre and instrument panel lights gone: 97 E200
 

Hi.
Hoping this is just silly question of replaceable bulbs, but over the past while the lights behind my climate control wheels and dials, recirculating air and rear-window de-mister have stopped working, and last night I noticed that the illumination in the ashtray is now also gone. I have checked the fuses, but all seem fine
I removed the heater panel to have a look, but all seems very complicated,and have learnt my lesson before about trying to "Fix" things I know nothing about myself!
Also the lights behind my odometer and the clock in my drivers instrument panel have gone too, but lights behind speedo, temp etc all fine though.
It's no real problem obviously, but it can get very dark in there on the motorway!
Any suggestions???