Originally Posted by DFW DL
The carts cost 1 Euro (50 cent or one-Euro coins only) and there are no change facilities in Arrivals A or B. I've never tried to get change at the exchange counter in C. Best advice is to make sure you have a one-Euro coin with you if you want to use a trolley.
If it is like MXP, you can use your Visa or MC to get the trolley. Your money is returned (as a coin, not a credit) if you put the trolley back in of several different return stations.