What must you be aware of when using navigation systems and road maps?

Your answer is correct because both points 1 and 2 reflect important realities about navigation systems and road maps under German traffic rules. First, the information in navigation devices and road maps can become outdated quickly due to frequent changes in road conditions, traffic regulations, or construction work. Second, even if a navigation system is up-to-date, temporary changes such as road closures or detours might not yet be reflected, so drivers must always stay alert and rely on actual road signs and conditions. Point 3 is incorrect because not all navigation systems have automatic updates; many require manual updates or may not update frequently. Understanding these limitations helps ensure safe and legally compliant driving.