How to change blower vent bulbs ?

[acapulco36]

Drove the ml tonight for the first time in almost 3 x mths.

For some reason all the a.c vent little marker lights ARE OUT.

All the way across LEFT TO RIGHT. Driver vent, middle vents, pass vent.

Anyone know how to access the central bulb that feeds the
vents light, or is it 1 per.

All were working fine when i parked the truck in july. Though
when i got into the truck it was pretty humid from all the rain
here while i was away. < SO HUMID A POWERY MILDEW WAS ON THE SEATS. CAR WASH TOOK CARE OF THAT
BUT NEED TO GET SOME WD40 GOING ON THE SUNROOF RAIL ETC. >

If there is a link or a quick instruction please let me know.

** Also how can i pull out the cabin air filter.??

Thanks