Hey Guys if you are looking to fill Gas last minute for rental returns and happen not to fill before then here are few pointers.
1) If you are on A4 Exit already then you have missed out on the Gas station so first suggestion fill it up before you get on to A4 exit to
2) If you missed like the way I did then keep driving towards the Malpensa Exit and when you are on ss336 which is the last 19 kms to the terminal. Its pretty stressful to be in this situation as I was almost empty tank too. Keep a look on the left hand side when you take SS336 just about 3 kms before the Terminal 1 exit on your GPS you will see a small gas station. You can clearly see PETROL written. I am not sure if its open all times which I should have checked for this posting but I think its open mostly. To get to that Gas station you will have to take the exit then get on to the opposite side (Since you are driving on right) service road. There are 2 roundabout that you will be crossing and then you will see the gas station right there.
I hope you guys find the information useful.
Apart from that the returns for the for the Cars are at Terminal 1. Look for signs on P1 P2 Car hire etc.... National/ Hertz located on Parking area B and Avis Dollar Sixty located in Parking Area A Cant recollect on the Budget and Europacar retruns