Hi. I have a 2012 1.6 Doblo. In the last few days I have experienced the clutch petal sticking to the floor and not returning. If you pull it up and then pump it a few times it will work again. Then it will run fine again. I have had it checked over and they are saying it might need a master cylinder. Or else the full clutch is a huge job they are saying. Anyone experience this before.