Petrol instead of diesel fuelled and driven 40 km

Hello have a problem with my Mazda 5 cw diesel.Did yesterday by mistake 9 liters of petrol.When I noticed my mistake I still filled 50 liters of diesel and then drove about 40 km to home. It left me no rest and so I called the Adac and got dragged into my workshop. There they told me to leave the tank, rinse the lead and replace the diesel filter. Now is the weekend and I have to wait until Monday. The workshop said so about 350 euros costs it fun. Can the pump have got something off? Or should I repel the car relatively quickly, plan a new purchase anyway in the next time. But first have the total panic that will be expensive.