L322 instrument cluster dim

Hi I’ve got a 2011 l322 tdv8 4.4, it’s been stood for 3 months due to work, when I went to it battery totally flat, charged it and got it running, all works fine but the instrument cluster is very dim, I’ve looked on internet but only seem to find info on faulty clocks going on and off, mine work fine just hard to see, just wondered if there was away to adjust the brightness, thanks phil

There is a reohstat on the right side of the drivers controls, don't know if it is the same on your model.