Used Audi A6 sedans for sale near Munster, IN

Sam provided me with the best service experience , good prices, explained how things go in my car , I have zero experience with cars, he went out of his way to explain everything for me and made things clear

Such a gorgeous vehicle, inside and out. Haven’t had a single issue with it for over a year of having it used. Inside of the vehicle is super roomy, and driving feels very comfortable, and really we’ll insulated!

I just purchased a car from Castle Hyundai of Oak Lawn, and I couldn’t be more grateful for the experience. From start to finish, the team showed true professionalism, care, and integrity—qualities that can be hard to come by in the car-buying world. Now I truly understand what they mean when they say “Drive Happy!” Jim (Sales Manager), Nick (Sales Consultant), Brennan (Internet Representative), and John (Finance Manager) were an absolute pleasure to work with. They went above and beyond to make sure I felt informed, respected, and supported throughout the process. They were transparent, never pushy, and always willing to answer my (many!) questions with patience and honesty. It was clear that they genuinely cared—about the car, the deal, and most importantly, about me as a customer. They didn’t just meet expectations - they exceeded them. The entire process was smooth, respectful, and even enjoyable. These are good people who take pride in doing right by others. Thank you to everyone at Castle Hyundai of Oak Lawn—you didn’t just help me get a great car, you made the whole experience one to remember. You went the extra mile (pun absolutely intended) and because of you, I now Drive Happy!

Bought my '16 A6 3.0 TDI a year ago with 89k miles, now has almost 110k miles, and drives like a dream still. Can't even tell it's a diesel engine by the way it drives and how quiet it is. I drive a lot for work, and the gas mileage is amazing! Interior is comfy, classy, and roomy. Drives like butter, handles like a sports car. Exterior isn't too flashy, it's perfect. No issues, and my last checkup at the German export dealer was perfect. My favorite car I've owned, now I want an A8 L!

Cheyenne Fontanez is the best! This process started back in March of 2025 when I was gone for the winter and she stayed in contact with me until we got a deal done on 10/8! It was a seamless process and I couldn’t be happier!

Excellent car, just done 122K and runs like a dream, had it serviced regular by brilliant guys at the general motor company in Stockport in UK. Didn't want to trade in when lease finished. Looking to get many more miles Peter Gilligan

Mike R was amazing. He even traveled to Chicago to bring our car to a different locations so we could see it. I would highly recommend this location.

My A6 2.0 quatro has 110k miles. Still looks great. Have gotten 34.5 mpg on open highways in Pa. Comfortable ride. Leather seats are holding up. This is my second A6.

Excellent experience this past weekend. JC was very helpful during the entire process. Highly recommended

I love this car. Audi is the best looking car. I got Tango red metallic with black interior . When you open the door Audi rings light up so you can see better in dark

Wide selection and no haggle are a plus over other dealerships. I like being able to see how many different makes and models. CarMax is the only place I will shop

This car was absolutely amazing to own and drive. From the slick exterior style, to the classy interior design. Jaw dropping. Many people will mistaken it for a newer model as well. Great drive. Very smooth, and strong. Highly recommend.

Awesome service from Jose!!! Very patient and kind. Explained every detail. All dealerships need a Jose!

The car meets my needs for the next few years. I’m happy with the handling and the gas mileage so far. I’m satisfied with all the features and the car is comfortable and easy to drive.

My uncle had recommended me to them as he’s purchased many cars before with Baha. Nas and Mayra were super informative and helpful. This was my first time buying a car so i was super stressed but they made the whole process a breeze.

The comfort level, the interior and exterior, the wheels, rims all are in great condition. I really like this car. Best Purchase ever!! Good place to buy a car.

I had my Outlander serviced at this location and they were able to help us out with great discounts and promotion deals. I am very grateful and highly recommend coming to this location for car services.

Wonderful buying experience Kimmy was so helpful and nice as could be loving the new Audi wagon

Very comfortable and reliable car. Great for road trips or around town. comfortable to drive and grab gas mileage. one of the best cars I have owned.

Paul was great, made the whole process a breeze. Super knowledgeable and helped me get my A4 Quattro. Highly recommend!

This is a fun, responsive, reliable, well built car to drive. At over 75K miles now, and I really cannot even consider trading it in because I don't think I will enjoy a better ride.

Initially had problems with the front brake rotors. Audi replace them twice, but did not replace the pads. Turned out the pads should have been replaced with the rotors because the pads just transferred material onto the new rotors causing the braking shimmy to return. I paid for new pads on the second rotor replacement - problem solved. Audi could have saved money (and saved me money) by just replacing the pads and rotors the first time. After this, the car was great. Very comfortable, and quick. Gas mileage was very good - about 19 MPG in town and over 30 MPG highway with the 6 -Cyl. due to cylinder cutout when crusing.

I had a great experience with them! They made the process very easy and even gave me a better rate than my own credit union, which I've been with for over five years. I highly recommend them to anyone looking for excellent service and competitive rates. Thank you!

Great service and easy to work with. In and out quickly and they had a great selection of imports.

The new design is awesome. The size of the car is perfect. Leges room is so good and the screens in the dashboard looks fantastic

Brandon and the Manager were very helpful in helping me finding the right car for me.

An truly amazing car with the best technology I have ever seen in an automobile. I am an electrical engineer so I don’t make that claim lightly. The best engineered car I have ever owned. I look forward to driving it whenever I need to go somewhere - a powerful comfortable car that can compete with cars costing much more.

Bryan was great to work with, as always. We will definitely return. He takes his time with us and we trust him with the entire process. It was an extremely smooth process.

Just what I was looking for. All the safety and technology combined with special features that make driving special again. A very special automobile for my family

Enis was great. Helped our family out with a nice car. Couldn’t be more happy!

I bought my audi a6 quatro s line 3ltr tdi automatic 2010 just under a year ago have had regular servicing and 2 new front tyres, just passed its mot last week, all it needed was two new front bushes, total cost £120-00,I have put just under 40 000 miles on clock since having her, never missed a beat, a few minor things such as wiper blades, rear boot lid struts but all in all, a very reliable comfortable loverly vehicle, and yes, I most certainly will be getting another

I had a really good experience with Guaranteed Motor Cars. The whole process was smooth, no pressure, and they were upfront about everything. The staff was helpful and made sure I left confident in my purchase. Definitely 100% recommend them if you’re looking for a solid car buying experience.

Excellent experience great people would by a vehicle from them and enjoy the experience talking to them

Very nice upscale vehicle. Bought as a previously 2 yr leased auto, avoiding new car price and immediate depreciation. V-6 engine has no hesitation and quietness is excellent. My only two negatives are lack of storage for incidentals and a bit quirky audio that may reset from time to time ( must wait for it to go through a cycle). It has a mind of its own. Overall, excellent vehicle.

Great job in and out. IT'S been a good experience so I will let people know.

I have owned my 2012 A6 Premium 3.0 since new and it is the most wonderful vehicle I have owned or leased. No major failures ever, incredibly fun to drive, reflects the quality built into this car. Always parked outside and the paint and finish are still amazing.