If your trip ends up going longer than planned and you need to keep your Sixt rental car longer than planned, you should do so right away to make sure everything goes smoothly:
The sooner you let Sixt know about the extra time, the better they can help you and see if there are any vehicles available that can fit your longer schedule. Remember that even if your exact car isn't available for a long time, Sixt may be able to help you find something similar.
Before you start the extension process, you should look at your rental agreement or go to the Sixt website to find out how extensions work and if there are any fees. This will help you get ready for any fees that might come up and understand how the extension works.
If you made your reservation on a website run by a third party, you need to contact that website directly to find out how they handle extensions. Their steps may be different from Sixt's, so getting in touch with them will make sure you follow the right steps to extend your rental period.
We see real customer feedback as the most reliable source of information. Feel free to leave your feedback since your contribution will be very important in raising awareness and making the whole experience better.
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