Hi Cburg
I have the same problem. 21 reg Mini Cooper s. Instrument Pod goes blank but car still drives OK. It happened to me twice while driving
no speedo and no energy and milage display, nothing. It has been hot in the UK recently I tried a heat shield idea to keep the temperature on the Instrument Pod cooler. In the sun always leave windows a bit open and the heat shield lowers the Instrument pod by about 25C
but problem still occurs. Early today it was quite cool outdoor temperature 14.8C but no display then one hour or so later it lit up OK. A couple of times plugging the charger seemed to kick it into life but not sure this is a solution to problem
I think there are a number of posts on this subject see below
hope this helps
https://www.insideevsforum.com/community/index.php?threads/instrument-cluster-failure.12653/
Bob