To drive comfortably and safely, it is important to correctly adjust the seat and the backrest of the vehicle. The **driver's back** should be supported by the backrest, but not completely vertical. In the **lumbar area**, the back should be **less vertical** than in the upper part. This allows the driver to reach all controls effortlessly and maintain a posture that prevents fatigue.

- **Backrest adjustment**: The position of the backrest should allow the driver to reach the pedals without straining the ankles and for the legs to be slightly bent. Additionally, when stretching the arms, the wrists should be able to rest on the top of the steering wheel, indicating that the backrest is in the correct position.

- **Avoid incorrect postures**: Driving with the back completely vertical or too reclined can cause fatigue and hinder reaction to unforeseen events. Therefore, it is crucial to find a balance in the inclination of the backrest, especially in the lumbar area.

By following these recommendations, comfort and safety while driving are improved, allowing for a better response to unexpected situations on the road.