Originally Posted by Seeker

The part number is: 99011-18K50-01A, they cost about £13 but when I checked a couple of dealers they didn't have stock. You'll have to order one.

What are you trying to do?

The left button is SEL and the right button is ADJ. Pressing the SEL cycles through:
Odo - trip A - trip B - panel brightness. Holding the SEL button down in trip A or B will zero the display.

Panel brightness/backlight: Press SEL to get to the oooo display (the one after trip B) then press and hold SEL until the oooo blink, then each further press of the SEL button will change brightness in 6 steps. Press and hold SEL to return to normal.

Clock set: press SEL and ADJ together for 2 secs and clock will blink.
Press SEL to adjust hr, press ADJ to adjust minute, press them both to return to normal clock. (I think the ign has to be on for this).

Pressing the ADJ button will cycle through: Instantaneous fuel consumption - Average fuel consumption - predicted range.