Climate control panel screen malfuntion

cleaned electrical connectors, checked fuses, anyone else ever experience this?
In the end it turned out to be a fault on the Control Panel Switch on the dashboard. Heater Control switch shorting out when warm. Part no longer
available from Mercedes in the UK, as are most parts for the W208. Had to search the scrap yards for a replacement that worked. £30. Job done.
Panel and Switch Unit are just Push Fit.


