The car has developed the fault again a week after it had been to the dealers, this time the fault occurred as the dealers were about to close for the day. check out the video of what is happening. I will have to hope that the next time the fault appears that the dealership is open so that I can take the vehicle to the dealers & get them to put the diagnostic computer onto the car whilst it is faulting in order for them to believe me & hopefully to fix the fault.