Comfort and Convenience
Cabin temperature is a common point of difference: passengers sitting still often feel cooler than the driver. Preferences vary with clothing, metabolism and where someone sits, so a comfortable setting is usually negotiated rather than fixed.
Safety and Driver Assistance
Spending a few minutes with the controls while parked, locating lights, wipers, demisting and mirror adjustment, means less searching once underway. Familiarity keeps small adjustments brief, which matters more when passengers are talking and the route is new.
Multimedia and Connectivity
Phone battery is the usual pinch point on longer trips, since navigation drains it quickly. If a charging socket is available, agreeing who uses it avoids a flat handset and keeps the driver's navigation running.