You access the car using the cambio app. Within the app, locate the 'Auto öffnen' option under 'Meine Buchung'. The key is stored in the glove compartment. Upon entering your PIN, you can then start the car.
Before departing, thoroughly inspect the vehicle for any damage. If you identify damage not yet documented in the cambio app or the on-board manual, please reach out to the booking service at +49 421 79 466 43.