Woher weiß ich wann eine kleine und wann eine große KFZ Inspektion notwendig ist?

First question:

Are “big” and “small” inspections planned by the car manufacturer for this car type? Or is there simply a standard service?

Second question:

Is there a big and a small service in this car type – what was last done?

The simplest way (with the risk that something unnecessarily complicated will be woken up to you, therefore only to recommend if you really trust the workshop master): question in a car workshop after, after specifying the year of construction, mileage and date as well as working scope of the last service (yes, these data are absolutely necessary to find out. You won’t come to see the last workshop bill.

The more complicated way (then you really know yourself, and are not dependent on truthful answers from other people) is to research in the service checkbook of the car, in the user manual, or if necessary in a service plan (which you can get in every car manufacturer’s contract workshop, if necessary for a few euros). Somewhere it is written, after how many years and after how many kilometers traveled, which services are to be made.

In some cars, for example in many VW models with an extended maintenance interval, the “small service” (only oil change and few controls) is not fixed rigidly after years and kilometers, but is calculated by the vehicle’s on-board computer based on the operating conditions. Many cold starts, many short distances, or very high load = shorter service interval, only long distances with gentle driving mode = maximum service interval.