Comfort and Convenience
Cabin temperature is a good example: some travellers want steady warmth, others prefer cooler air with more ventilation. Differences in clothing, metabolism and seating position mean one setting rarely suits everyone, so agreeing early avoids constant adjustment.
Safety and Driver Assistance
Before a long drive, it is worth locating wipers, lights, mirrors and hazard switches while parked. Familiarity means less searching later, and unfamiliar hire or borrowed cars are where small hesitations most often occur.
Multimedia and Connectivity
Phone battery life matters most on long routes, since navigation drains it quickly. A cable and suitable socket keep the device topped up; if hands-free calling or audio playback is supported, that is a separate matter from charging.