Comfort and Convenience
Cabin temperature is a common point of negotiation, because people sitting in the same car feel warmth differently depending on clothing, where sunlight falls and whether they are driving or simply riding along.
Safety and Driver Assistance
Spending a few minutes with lights, wipers, mirrors and demisting before setting off means less searching later. Preparation is easiest when the car is stationary and nobody is waiting on a decision.
Multimedia and Connectivity
Passengers often want to keep a phone charged on a long journey, which is a separate matter from playing audio or taking a call; where such functions are offered, each is used differently.