The lady didn't know the rule even though she was working there for 27 years as she claimed. The rule is if somebody has an Indian driving licence and they are travelling germany for short term (less than six months) they can hire a car with the same indian driving licence with out an IDP. I requested her and tried to explain her but she wouldn't listen, although i've hired a car so many times in germany & UK with the same licence. She made me go to the local police station and when they confirmed then she gave me the car. This whole process took 2 hours and i was so much depressed by all this.