A chauffeur car is not a set of keys. The driver already knows the stop order and the waiting time. A meeting, a hospital exit or a factory run can share one day.
One or two passengers suit a Vito / V-Class. A family with bags is easier in a Caravelle. A team out all day moves to a Sprinter. When the address list arrives in writing, the car is not given to another job. The quote comes back the same day.