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

Using the time remaining on a parking meter without inserting more money is correct according to German traffic regulations. It is important to note that if the time on the meter has not expired, you are allowed to utilize it, as it indicates that you have already paid for that duration of parking.

However, there are circumstances where a parking disc might be necessary, especially in certain areas where specific parking rules apply. The combination of options would reflect that you can use the paid meter time directly, but in some cases, using a parking disc may also be required to indicate your parking time properly. Hence, depending on the specific location's rules, being aware of all relevant regulations ensures compliance and avoids potential fines.