MA will not take a fee for currency exchange (just 100 ped prior to that), but they will use the ECB (European Central Bank) rate for the day of withdrawal. Friday rate was 1.3684 USD for 1 EUR.
If you withdraw USD into your EURO account: some banks do not accept this and will reject the payment, some will make the conversion. Usually the bank rate will be worse as they dance around the reference (ECB or national one), buying little lower and selling little higher.
Just verify with them against ECB rate - account rates are different from their exchange offices.