New and used 2026 Mercedes-Benz S-Class sedans for sale near Deer Park, IL

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.

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

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.

it was just some presales questions and they were quick to reply and offered a lot of assistance.

The dealership contacted me and followed through on everything I asked and needed of them. Great overall experience.

Vel is a great sales guy. Very responsive and will work with the customer. We drove from MI with a trade in and they honored their offer. There were a couple minor things like steering wheel was more worn than we would have expected given the nice condition of the rest of the car. Small headliner plug interior for convertible top was missing. Other than that it was a smooth transaction.

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.

One of the best dealerships in Chicagoland Walter Salcedo amazing person very professional, knowledgeable, and will strongly recommend Walter to my friends for new sprinter.

Valerie is a pleasure to work with. she?s very helpful and very attentive to our needs. She takes a complete look at our auto needs and never oversells services that we don?t need.

Very kind and caring . Helped alot to make the deal. Salesman was kept me informed. Lending Maneger also put extra effort to make the deal.

Fast and easy. All staff was pleasant, well spoken and mannered. Made an out of state purchase with a few email and phone calls. Sales person Luke was excellent.

Earl was outstanding, he and the rest of the team found a solution for us an we are very happy with our decision to buy our GLE.

Jesus was very professional and helpful to me. The overall experience was easy and pleasant. The technician provided a great video of my inspection. I highly recommend Jesus and this dealership for inspections and repairs.

The loaner is a very convenient option during the timely completion of the new brakes and a repair. We feel very confident using the Service Dept at this location.

I had an outstanding experience at Mercedes-Benz Naperville working with Abraham during my recent vehicle purchase for my wife. From the very beginning, he exceeded my expectations in every way. Abraham was incredibly attentive, really listening to what I was looking for and helping me find the perfect vehicle without any pressure. His knowledge of the Mercedes-Benz lineup was impressive - he explained all the features clearly and made sure I felt completely comfortable with my decision. What truly stood out was his follow-up after the sale. Abraham checked in to ensure everything was going well and even went out of his way to resolve a minor issue I noticed after taking the car home. That level of dedication is rare and truly appreciated. I would highly recommend Abraham to any friend or family member in the market for a car. His professionalism, expertise, and genuine care made this transaction a great car-buying experience.

I absolutely love my brand new E350!!! The dealership was excellent. I felt like I had a trusted advisor in Liz! I would highly recommend her if you’re looking for your next Mercedes-Benz!!

Excellent service by sales person-Hassan A. and his staff. I was looking for to lease a vehicle and Hassan A. was kind enough to show me the deal of the month and of the dealership which I grabbed it! Very good sales person. I highly reccomed to go see Hassan Arouri for your next vehicle. Vithal Chaudhari