Originally Posted by
krpjr
For car rental, the answer is yes. I would like to stay in FRA for a couple of days, drive to Hamburg > Berlin > Szczecin, Poland and fly out from near there or Wroclaw.
This will cost you an arm and a leg in car rental fees. There is a hefty surcharge if you rent a car in one country and return it in another.
Also, in larger European towns (and that certainly includes Frankfurt, Hamburg and Berlin) a car is more of a hindrance than a help.
Doing the journey by train would save both money and hassle.