Final answer:
An appropriate ProPILOT Assist demo drive should be long enough to showcase its features in various driving conditions, typically around 30 minutes, depending on the specifics of the route chosen.
Step-by-step explanation:
The appropriate length of a ProPILOT Assist demonstration drive route would typically be determined by a series of factors including the intended showcase of the system's features, traffic conditions, and the variety of road types. A balanced route that includes city driving, highway driving, and various features of the road, such as turns, merges, and speed variation areas, can give a comprehensive demonstration of ProPILOT Assist's capabilities. However, it's ultimately up to the dealership or person conducting the demo to decide the length based on these conditions. In general, a drive should be long enough to demonstrate the key features of ProPILOT Assist but not so long that it becomes inconvenient for the customer. A route of approximately 30 minutes is often sufficient to demonstrate adaptive cruise control, lane keeping, and the other features of the system.