Comfort and Convenience
Cabin temperature is a common point of disagreement: what feels pleasant to the driver can feel too warm or too cool to someone sitting elsewhere, since people differ in clothing, activity and simple personal preference.
Safety and Driver Assistance
Before setting off with passengers, it is worth locating the lights, wipers, mirrors and hazard switch. Sorting this out while parked means less fumbling later, when the car is moving and people are talking.
Multimedia and Connectivity
A phone used for navigation drains quickly, so passengers often want somewhere to charge it. Where a suitable power outlet or cable is available, one person can keep the route running while others rest.