The time on a parking meter has not yet run out. What do you do?

You selected the correct answer: if there is still time left on the parking meter, you are allowed to use that time without paying again. German parking regulations permit drivers to use any remaining paid time on the meter, even if someone else paid for it before you. There is no requirement to insert extra money as long as there is valid time showing. This ensures that paid parking time can be fully used and avoids unnecessary additional payments.