Before starting a trip, it is essential to **check the adjustment of the mirrors** to ensure safe driving. This check should be done **on a flat and straight surface**.

- **Properly positioned mirrors**: When adjusting the mirrors, make sure that when looking at the interior mirror, you can see all four edges of the rear window. For the side mirrors, you should be able to see the road, the vehicles coming from behind, and those on the sides. Additionally, by slightly turning your neck, you should see a part of the rear of your vehicle.


- **Importance of a flat and straight surface**: Adjusting the mirrors on a flat and straight surface ensures that the view is not distorted by inclinations or unevenness of the terrain, which could affect the correct alignment of the mirrors.

If you find that the mirrors are poorly adjusted while driving, it is important to stop the vehicle in a safe place and make the necessary adjustments. However, it is preferable to perform this check before starting the trip to avoid distractions and ensure optimal visibility from the start.