Fuel problem with German Airports and FS9

I hope some one can point out where I am going wrong here. I am trying to do a flight around Germany in a Mooney Bravo and cannot find a fueling station at either Munich or Erfurt. I shutdown and then use slew to try and locate the area I should taxi to in order to refuel. I know I can just oush a few keys and top up but I would like to refuel the normal way if possible.