The instrument cluster temporarily shorts out or goes blank and them comes back on and resets in a different display mode. There are various display modes having different information such as mph, fuel efficiency, etc. Several repair shops tell me that in order to diagnose the problem, the cluster has to be exhibiting the problem when they look at it. In other words, it has to be a continuous short out. It’s not continuous, it’s temporary and sporadic or random. This is a direct safety issue in that the driver has no reading on the vehicle speed and when the short out becomes long term or permanent the car will have to be driven with no reading of speed or engine monitoring parameters such as temperature and oil pressure. New clusters are no longer available and rebuilt requires shipping the existing cluster for exchange. This is a common problem, as documented through Google search. Concerning the vehicle speed question below, anywhere from 0 to 70 mph.