What is a pre-condition for environmentally-friendly and energy-saving driving?

The selected combination is correct because both checking the tyre inflation pressure regularly and performing vehicle maintenance regularly are essential for environmentally-friendly and energy-saving driving.

Regular tyre pressure checks ensure that the tyres are properly inflated, which reduces rolling resistance and improves fuel efficiency. This is in line with regulations aimed at promoting eco-friendly driving practices according to German road safety standards.

Performing regular vehicle maintenance ensures that all components of the vehicle, including the engine, brakes, and exhaust system, operate efficiently. Efficient vehicles consume less fuel and emit fewer pollutants, aligning with Germany's focus on reducing environmental impact.

In contrast, washing the engine is not a prerequisite for energy-saving driving. While it can help maintain vehicle aesthetics and potentially spot issues, it does not directly contribute to overall fuel efficiency or environmental friendliness.