New and used 2025 Mercedes-Benz C-Class sedans for sale near Deer Park, IL

My recent purchase of a 2025 GLE 450 has been a thoroughly positive experience. The vehicle itself meets and exceeds expectations in terms of its luxury features and performance capabilities. I would particularly like to commend the exceptional service provided by Jack Poidomani, who went above and beyond to understand exactly what I was looking for and patiently helped me find the vehicle that checked every box. Furthermore, the finance team efficiently secured my desired interest rate of 2.99%, which significantly contributed to my overall satisfaction with this purchase. I am very pleased with my new Mercedes GLE 450 and the professional manner in which this transaction was handled.

Michael, my sales specialist, was amazing. He was knowledgeable, helpful, kind and most importantly, not pushy. I was test driving many cars in different places and he was very patient with me. In the end I purchased my CLA250 and I couldn?t be happier!

I had a wonderful salesman,Adrian.He was a pleasure to work with.I can say everyone that helped did a great job.Jenifer in fiance help us with the purshase,she was pleasure also.I will come back for any new cars. Deirdre Perroy

Mercedes c class. I believe this is the 3rd car I have purchased from Autohaus. Very comfortable feeling

Wonderful experience from first contact through sale. Albert Tulo was knowledgeable, friendly, and efficient with processing my used car sale! Highly recommend!

Great service as always. Really liked Francisco. He was very personable and extremely helpful. Very easy to work with. And that's all I have to say.

We stopped into Mercedes of Westmont as a second stop in our search for a new car. I am not really a fan of buying new cars, we typically buy a car and drive it until it’s dead, just so we don’t have to go thru the whole purchasing process of getting a new car. Chris at Mercedes of Westmont has completely changed my outlook on buying new cars! He is very professional, but yet relatable and understanding of the process and how to make it a pleasurable experience. We weren’t looking to purchase a car that day, but Chris really listened to our wants and needs and was able to find something for us that fit what we were looking for. He was very patient with us as we made our decision. Hands down the best experience I’ve had buying a car.

Extremely friendly and professional people. I would buy from them in the future.

This is really a great place, they are so busy it is amazing. Pricing on some cars are fantastic. I just sent a friend there to look at one and it was gone by the time she arrived. I'm sure she'll find another. We bought an SUV, but I am also in the market for a sedan! This will for sure be my Go To place!

I didn’t end up buying the car because i didn’t make my decision fast enough. It was sold. But the service was consistent and precise with emails and speedy quick at responding. Loved the service and would definitely recommend this dealer.

I have purchased vehicles from many different dealerships, AutoHaus is by far the best. They treat you like you actually matter to them.

Liz in sales was always helpful and made the buying process a breeze. She addressed all my concerns about the Carfax report, pricing & extra keys. The dealership's facilities are convenient & very clean. The vehicle itself was in great condition. The financing process can be made more transparent. It would be helpful to know about the extended warranty options beforehand as cost of these options can add 10-20% to the cost of the car. It is hard to make this decision at the last moment. However, I could have added to the financing.

Was looking to purchase a specific vehicle from this dealership. The one I wanted had a pending sale. The sale was not finalized and the salesman I was working with called me inmediately to inform me. I think everything went pretty fast once at the dealership.

This is the third S-class Mercedes I have purchased from Mercedes-Benz of Westmont and I could not be happier. Going through the purchasing process was a delight because Kimberely Cager, my Sales Rep, and the sales management team made me feel better than just a valued customer. The real test, however, came when driving the new 2025 Mercedes S580. The supreme road handling and comfortable seating were nothing short of spectacular, and the many options like the integrated toll system (driving through tolls of different states has become hassle free), Apple CarPlay, and several driver-assist features has enhanced my driving experience. While understanding how to use and benefit from the many new features and options was a little daunting, Kimberely and the Product Concierge, Damir Oliynyk, have eased my doubts, and I?m looking forward to a long multi-state road trip.

Everyone at every level of the organization - be it sales, finance or service - were extremely professional with a top concern for customer service. We really appreciated this above all else.

Sales rep (Kenn) and GM (Bradley) were awesome to work with. Just the kind of buying experience everyone is looking for. Highly recommended!

Tony's customer service is excellent. He is very knowledgeable and informative. We highly recommend anyone in the market and will be referring our friends and family to him. We could not have asked for a better experience.

Ever bought a car in an hour? Go to Knauz. I was amazed. Including a short test drive, financing, and a car wash we were on the road in just over 1 hour. Brandon did a great job.

Great inventory, pricing and good service but service is high price for somethings like oil change, other mercedes dealers $100 less for identical service. Walter, salesperson, easy to work with.

My service was seamless. Lee was excellent and took great care of my car and me. Touched up all my scratched wheels. Highly recommend Knauz and Lee