Used Audi S4 for Sale in O Fallon, IL

Automatically adjusts your speed to maintain a safe distance from the car ahead.

See behind your vehicle while reversing with a live video feed to avoid obstacles.

Make and receive calls safely through your car's audio system without touching your phone.

Start your car with the push of a button while the key fob stays in your pocket or bag.

Alerts you if your car begins to drift out of its lane without signaling.

Enjoy high-quality sound with advanced speakers for a better listening experience.

Start your car from a distance to preheat or cool the cabin before you get in.

Alerts you with a loud alarm if someone tries to break into your vehicle.

Keep passengers connected with in-car internet powered by a paid data plan.