Sixt is for me the best car rental company in Germany. At Düsseldorf airport their counters are…read moreconveniently located in the arrival hall, from the luggage belt you walk max 5 minutes.
There are always enough service agents so waiting time is short enough. Their selection of cars is incredibly good and suits every budget. You can get the smallest Volkswagen, a luxurious S-Class and even the Jaguar F-Type sports car, they have it all on offer.
The check in time takes around 5 minutes, you show them your reservation, credit card and drivers license, you sign and then you're good to go.
The cars are parked in the car rental garage which is around 8 minutes walking distance from the counters. If you have reached a certain membership tier your car will be ready just in front of the terminal.
The booking process is either done via their website or you can download their iPhone / Android app to your smartphone. Their app is really easy to use!