Questions about inspection and maintenance

How do I recognize that my FINN car needs maintenance?

What do I do when my FINN car is due for service/inspection?

How can I request a inspection appointment via the FINN customer portal?

How do I recognize that the HU/AU (also called TÜV) is due for my FINN car?

What do I do when my FINN car is due for the HU/AU (also called TÜV)?