2003 L322 , I only have 1/2 of my bottom information display panel back lit, ( The LED read out is prefect) it's just the right hand side of this panel is not back lit anymore.
Microcat lists 5 x YAW00010 bulbs are fitted to the gauge panel. Just wanting to check if one of these bulbs controls the back lighting of the LED display

Hi l-o-w, there are five bulbs to light up the led readout.
it's a dash out job to do them, plenty of how to's on you tube.
That part number is correct.

Thank, for confirming the part number. I have had dash top out before so familiar with process.
I think I might replace all 5 with new ones, knowing my luck pull it all apart then later another blows.

You could replace with leds, I have done mine.
the led equivalent is T5/286 B8.5. I think there was 10 in a pack for a few quid.
the only thing I had to do was bend the metal tangs to suit.

Thanks Gregdav, will check them out.