My C180 N Plate Auto has developed an intermittent fault in that some times it will not start without setting the accelerator. it will then run but stalls as soon as you release the power.embarrising at junctions if it stalls. as i said it is intermittent. No fault shown at the garage as apparently this model does not show all faults on the computer read out. Any advice welcomed.The vehicle has not been used regulary over the past three months but started every week,