I ordered a brand new Audi with my smartphone and it was delivered to my door the next day

Audi is on a mission to get you in its rides.

The automaker announced its "Audi on demand" service in San Francisco earlier this year. It's an app that lets you rent an Audi for a day, or for as long as a month - all from your smartphone. You can book almost any model - from the conservatively sporty A4, to the rabble-rouser R8 supercar.

Your car arrives with a full tank of gas and a concierge who shows you around the car before sending you on your way.

I tried Audi on demand over the weekend by reserving this brand-new 2016 Audi TT Coupe.

Hop in, I'll show you how it went.