Odometer/Trip meter
 

The lower left digital display on my instrument panel that displays odometer/trip meter has gone dark. Does anyone know which fuse supports that? Bentleys does not break it out

The bulb is out. You will need to pull the cluster to replace.

+1. I bought a 98 Boxster years ago on the cheap ($4,800). One of the things that the owner listed is there was no odometer readout. When I went to look at the car, it was sitting as just the right angle with the sun behind the car that I could make out the faint display.

I pulled the cluster and replaced the bulb.

Also note that if you ever lose your cruise control function, it'll mostly likely be a bad bulb (really)!