How are lubricating points lubricated on motor vehicles and trailers?

The lubrication of points on motor vehicles and trailers is crucial for ensuring the proper functioning and longevity of the vehicle.

1. Central lubricating systems use a reservoir to distribute lubricant to various points automatically. This method is convenient as it ensures that all the necessary points receive lubrication consistently without requiring manual effort.

2. Manual lubrication involves using a grease gun to apply lubricant directly to specific points as needed. This method requires the operator to check lubrication levels frequently and apply the lubricant themselves.

3. While checking the engine oil level is important for the overall maintenance of the vehicle, it is not directly related to lubricating the points mentioned in the question.

Thus, both central lubrication and manual lubrication methods are essential for maintaining the vehicle's mechanical parts, aligning with vehicle maintenance regulations outlined in German traffic law. These practices are vital for road safety and ensuring that vehicles operate smoothly and efficiently.