Ready for the test, in the fast lane: With our App for Android
Get the Führerschein-bestehen.de App with our explanations and the official catalogue of questions.
Get it on Google Play
Sick of ads!?
Log in now and continue studying with no ads!
Fully equipped for exam preparation:
All of the questions from the driving test in all translations
All of the questions from the theory test, in many languages
Exam simulations and special questionnaires
Exam simulations and special questionnaires
Explanations for all Class A and B questions
Explanations for all car and motorcycle questions
Certified by Trusted Shops
Certified by Trusted Shops
Can be used on all devices (desktop, tablet, smartphone)
Can be used on all devices
Try it for free!

The explanatory texts for the questions were machine translated. More info

All explanatory texts were compiled in German and then machine translated. This may result in translation errors. However, this only refers to the explanations to the questions. The translations of the questionnaires were done by TÜV | DEKRA arge tp 21 and are exactly the same as the translations in the theory test. These translations are only available once you are logged in. All other translations on the website were done by a different translation agency.
Display explanatory texts in original (German)
Wartung von Kraftfahrzeugen und rechtzeitige Veranlassung von Reperaturen
Zusatzstoff A, A1, B, A2

Warum müssen Sie die Bremsflüssigkeit regelmäßig nach Vorgaben des Fahrzeugherstellers austauschen lassen?

Brake fluid ages by the fact that its water content gradually increases over time. The admissibility limit is 3% water content.
Damit die Bremsanlage auch bei hoher Belastung funktionstüchtig bleibt
Increasing the amount of water restricts the functionality of the brake.
Damit der Wasseranteil in der Bremsflüssigkeit nicht unzulässig hoch wird
Exceeding the permitted water content can be prevented only by replacing the brake fluid.
Damit die Bauteile der Bremsanlage nicht beschädigt werden
As soon as there are free drops of water in the brake fluid, metallic parts can rust. Even the freezing of free water drops can lead to damage.

Prüfungsreif auf der Überholspur!

Register now to see the questions in your choice of 12 languages.

Sign up

Do you like our explanations?
You will be amazed by our online learning system that helps you prepare for your driving test! Learn all the answers for the theory test online and pass on your first try.
Test now
Ready for the test in the fast lane: The study App with our explanations!

Get it on Google Play


Download the ad-freeFührerschein-bestehen.de App for your smartphone or tablet and study with help from our explanations and the official catalogue of questions.