How are lubricating points lubricated on motor vehicles and trailers?

Your answer is correct because in German traffic rules and vehicle maintenance, lubrication of motor vehicles and trailers is done in two proper ways. First, central lubricating systems supply lubricant from a reservoir automatically or semi-automatically to various points on the vehicle, ensuring continuous lubrication without manual effort. Second, manual lubrication involves using a grease gun to apply lubricant directly to specific lubricating points, like joints or bearings, requiring periodic attention. Option 3, checking engine oil levels, is important for engine maintenance but does not relate to how lubricating points on the vehicle or trailer are lubricated. Understanding these methods is essential to ensure safe operation and longevity of vehicle components.