How can you check the engine oil level?

The engine oil level is crucial for ensuring proper engine function and longevity. In vehicles, you can check the oil level using two main methods:

1. **Sight-glass**: This is typically located on the oil reservoir. By looking at the glass, you can see if the oil level is within the recommended range.

2. **Oil dipstick**: This is a removable rod that you can pull out to check the oil level. You wipe it clean, reinsert it, and then pull it out again to see the level marked on the stick.

Both methods are essential for accurately assessing oil levels and must be utilized to follow maintenance guidelines and prevent engine damage, which aligns with German traffic regulations regarding vehicle maintenance. The third option, the instant fuel consumption display, is not relevant for checking oil levels and should not be included in your answers. Proper maintenance checks are not only important for safety but also legally required for the operation of vehicles under German law.