How can you achieve sufficient visibility through the windscreen?

To achieve sufficient visibility through the windscreen, it is crucial to manage how you maintain clear sightlines in various weather conditions.

1. Switching on the windscreen wipers when it is foggy helps remove moisture and dirt that can obstruct visibility, ensuring you can see clearly.
2. Preemptively using the wipers before slush from other vehicles splashes onto your windscreen helps maintain clarity and prevents sudden visibility loss.

The option about turning the ventilator off and keeping the windows closed when the windscreen is steamed up is incorrect because it can actually worsen steam buildup. Instead, using the ventilator to circulate air is essential to clear fog efficiently.

The combination of the first two choices reflects the proactive steps you must take according to German traffic laws to ensure safety while driving in adverse weather conditions. Maintaining visibility is vital for avoiding accidents and ensuring the safety of all road users.