Yes what I consider the main gauge as I don't understand the others so well. The one in the centre at the bottom of the speedo. Last night in a scenario and in a time table service every time I applied the brakes no indication of what was happening in that gauge. When I did the scenario I thought maybe it was to make it more of a challenge so I put up with it. But when I tried a service and tried the brake, same again. Thought no thank you and gave up on I.O.W.