I am renting a car in Germany and returning it in Germany. No problem in doing that. However, in various places I am noticing that if I plan to drive into Austria, there is some sort of 'problem'. I am wondering if this is the same as the Iberian Peninsular. All cars rented in Portugal CANNOT be taken to Spain. Special cars must be rented for this purpose as well as additional insurance must be taken out. You must inform the agency when renting in Portugal that the car is being taken into Spain. That way, you will get the required car. Is this the problem here? Any help with information is gratefully received.