What must be remembered with regard to vehicles with canvass covers?

The selected combination is correct because both points 1 and 2 highlight important safety considerations for vehicles with canvass covers according to German traffic regulations.

Point 1 emphasizes that canvass covers should not obstruct the driver's rear view through the outside mirrors, which is crucial for maintaining safe driving conditions and avoiding accidents. An unobstructed view allows the driver to see other vehicles and pedestrians clearly, which is necessary for making informed driving decisions.

Point 2 addresses the stability of unloaded trailers with high canvass covers, which can be particularly affected by side winds. This awareness is essential for preventing loss of control and ensuring the safety of the vehicle and others on the road.

Overall, adhering to these points helps enhance road safety and compliance with German traffic laws.