Audi On Demand luxury car rental service killed off

Audi’s flexible app-based car rental service known as Audi On Demand is coming to an end. The automaker states on the service’s website that the final date by which a car can be reserved is Sept. 30, 2024. The service was launched in the U.S. in 2015 and later merged with the independent car rental service Silvercar, which Audi acquired in 2017…