Originally Posted by DansSlk

No its not quite like that if you ask for a car when you book a service you will get one but it might take a little longer for you to get an appointment you can't say i will be there at 9am in the morning and i want a car its the dealers call when you are booked in so they can get you a car.

If you car arrives on breakdown and you have to be somewhere you can say hey look i gotta be going fix mine this second or i need a car and you are entitled to one there and then.