You can extend your reservation at any time. The reservation will cost you 0,09€/min after the first 15 minutes.
Right next to your current reservation time you will see a green "+" symbol. Tap on the symbol and you will be taken to the reservation overview, where you can extend your reservation. Use the dial to select your desired extension.
Your total reservation time and it's cost is displayed under the reservation view 🤓
Good to know:
If you arrive at the vehicle before your reservation expires, you will not be charged for the additional minutes.