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*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
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Used
2021 Mercedes-Benz GLS 450
for sale
near
Buffalo Grove, IL
- Down Payment
- $0
- Net trade-in value
- $0
- Months
- 72
- APR
- 7.0%
- Sales tax
- 0.0%
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
Features
Reviews
Justin always goes above and beyond.
Justin always goes above and beyond. He pays attention to detail and I recommend him for future services!
Love this car
This car met all my needs and more. Love the interior and the way its moves. So comfortable and reliable! Very pleased with this car!






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
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Reviews
We just bought a high mileage TESLA from star motors.
We just bought a high mileage TESLA from star motors. The entire experience and the car itself was great. Alex can actions as very reliable, open and ready to help always. Payment and shipping were managed in a very honest and trustworthy manner.
Best SUV we've ever owned.
Exceptional vehicle in the SUV class. We drove the BMW X7, Audi Q7, Volvo XC90 and this GLS 450 just kept blowing them out of the water. The ride is amazing and we feel the comfort level and size is the best






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
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Reviews
We were treated very well - both the sales manager and
We were treated very well - both the sales manager and the sales rep were friendly, courteous, and knowledgeable. Very happy with our purchase. Go Taos!
You get what you pay for
We are in our first five months and I seriously believe all the safety options have kept me out of at least two accidents. The car on the highway practically drives itself while giving me a message. Audio systems are excellent. The 450 GLS makes driving a bit of a joy.






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
Features
Reviews
From the moments I got in the dealership until I left I
From the moments I got in the dealership until I left I was treated very nice and very welcomed. I looked at Lexus RX and end up buying it because I felt comfortable and car is clean with good competitive price. Very recommend
Great car!
Luxurious to drive and very quiet riding car. I am very satisfied with the car. The electronices are a bit over whelming at first. Love the car.






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
Features
Reviews
Worked with John B for a new Bentley.
Worked with John B for a new Bentley. He was quick and efficient, answered all my questions and the car is in mint condition. Car was fully serviced and I love it
Great Electronics and Engineering
This car is state of the art in human factors engineering. It has multiple layers of safety enhancements. Interior is very spacious. The 42 volt battery provides quick acceleration which allows the car to have no lag time when accelerating.






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
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Reviews
Got my car serviced here.
Got my car serviced here. Honestly I thought I was in for a lot of money on my Panamera but they replaced the engine for a great price …couldn’t be happier. Ask for Carlos






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
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Reviews
Great place
Great staff and beautiful cars, had a wonderful experience. Highly recommended, very easy to do business with, transparent and no pressure, the entire team was friendly and professional






Mercedes-Benz Certified
2021 Mercedes-Benz GLS 450 4MATIC
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Reviews
Excellent
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.






Used
2021 Mercedes-Benz GLS 450 4MATIC
Vehicle information
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Reviews
I am writing to express my sincere appreciation for the
I am writing to express my sincere appreciation for the outstanding service I received during my recent visit to your dealership. As a loyal customer who has now purchased three cars from your establishment, I felt compelled to share my positive experience with you. The team at Ultima motors truly embodies the meaning of exceptional customer service. From the moment I walked in, I was greeted by amazing staff who made the entire car buying process incredibly smooth and hassle-free. Not only did they streamline the process, but they also managed to secure a fantastic deal for me. I must particularly thank Chris from the Sales department for his professionalism and helpful demeanor throughout the transaction. His dedication to ensuring customer satisfaction is truly commendable, and I will not hesitate to recommend him to family and friends who are in the market for a new car. Furthermore, I was impressed by the overall organization and efficiency of the management . It is evident that the entire team is committed to delivering prompt and high-quality service to every customer. The quick and professional service I received further added to the overall positive experience, solidifying my decision to continue purchasing cars from your dealership in the future.



Mercedes-Benz Certified
2021 Mercedes-Benz GLS 450
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Used
2021 Mercedes-Benz GLS 450 4MATIC
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Reviews
Ziegler Land Rover steals buyers money and cars.
Ziegler Land Rover steals buyers money and cars. They sell new vehicles to you and then negligently deliver this to someone else with no any proper documentation. When you request your car or money back they simply kick you out declaring that deal is done. Then they steal your sales tax money and they try to register the stolen vehicle on your name. General manager and new cars sales manager are making at you telling to go to the insurance company. But there is no any insurance because the vehicle wears never delivered. Do not buy any cars from this fat cockroach. They are thief.






Used
2021 Mercedes-Benz GLS 450 4MATIC
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Reviews
I just bought my 2017 corvette grand sport two weeks ago.
I just bought my 2017 corvette grand sport two weeks ago. I flew in from New York. I can’t say enough good things about the process. We worked with Armin, he was top notch. He made every aspect about buying this car seamless and easy. He even arranged an Uber to pick me up from the airport to bring me right to the dealership. We just adore our new car. It’s perfect!! A million thanks 🙂 Joe and Denise
There are 20 matching cars close to your year range.






Mercedes-Benz Certified
2022 Mercedes-Benz GLS 450 4MATIC
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2023 Mercedes-Benz GLS 450 4MATIC
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2022 Mercedes-Benz GLS 450 4MATIC
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2022 Mercedes-Benz GLS 450 4MATIC
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2022 Mercedes-Benz GLS 450 4MATIC
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2020 Mercedes-Benz GLS 450 4MATIC
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Used
2019 Mercedes-Benz GLS 450 4MATIC
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Used
2022 Mercedes-Benz GLS 450 4MATIC
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Used
2022 Mercedes-Benz GLS 450 4MATIC
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Used
2019 Mercedes-Benz GLS 450 4MATIC
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Used
2023 Mercedes-Benz GLS 450 4MATIC
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Used
2023 Mercedes-Benz GLS 450 4MATIC
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Used
2023 Mercedes-Benz GLS 450 4MATIC
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Used
2020 Mercedes-Benz GLS 450 4MATIC
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Used
2023 Mercedes-Benz GLS 450 4MATIC
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Mercedes-Benz Certified
2023 Mercedes-Benz GLS 450 4MATIC
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Used
2019 Mercedes-Benz GLS 450 4MATIC
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Mercedes-Benz GLS 450 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 Mercedes-Benz GLS 450 | $91,910 | |
2025 Mercedes-Benz GLS 450 | $74,985 | 8 Great deals |
2024 Mercedes-Benz GLS 450 | $69,999 | 12 Good deals |
2022 Mercedes-Benz GLS 450 | $43,995 | 7 Good deals |
2019 Mercedes-Benz GLS 450 | $16,695 | 3 Good deals |
About the 2021 Mercedes-Benz GLS 450
4MATIC shown (base trim).
- Seating
- 6
- Door count
- 4
- Drivetrain
- All-wheel drive
- Combined MPG
- 21
- Transmission
- 9-Speed A/T
- Engine
- 362.0-hp, 3.0-liter, Straight 6 Cylinder Engine (Gasoline/Mild Electric Hybrid)

How much does the 2021 Mercedes-Benz GLS 450 cost?
The 2021 Mercedes-Benz GLS 450 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2021 GLS 450 is $42,423, with pricing starting at $29,995.
What is the MPG of the 2021 Mercedes-Benz GLS 450?
The 2021 Mercedes-Benz GLS 450 offers up to 20 MPG in city driving and 24 MPG on the highway for a combined rating of 21 MPG.
These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle trim, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2021 Mercedes-Benz GLS 450?
The 2021 Mercedes-Benz GLS 450 compares to and/or competes against the following vehicles:
Is the 2021 Mercedes-Benz GLS 450 reliable?
The 2021 Mercedes-Benz GLS 450 has an average reliability rating of 3.5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 GLS 450 owners.
Is the 2021 Mercedes-Benz GLS 450 a good SUV?
Below are the Cars.com consumer ratings for the 2021 Mercedes-Benz GLS 450.
- Comfort 5.0
- Interior 4.9
- Performance 3.8
- Value 3.1
- Exterior 4.9
- Reliability 3.5
62% of drivers recommend this car
- Comfort 5.0
- Interior 4.9
- Performance 3.8
- Value 3.1
- Exterior 4.9
- Reliability 3.5
GLS 450 (1 style)
Style |
---|
GLS 450 4MATIC SUV |
Inventory price |
Starting at $76,000 |
Combined MPG |
21 |
Engine |
362.0-hp, 3.0-liter, Straight 6 Cylinder Engine (Gasoline/Mild Electric Hybrid) |
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
Research the 2021 Mercedes-Benz GLS 450
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This vehicle is certified pre-owned, backed by a manufacturer warranty, and typically undergoes a rigorous multi-point inspection to ensure quality and reliability.
This vehicle is currently in high demand given its competitive price, desirable features, and overall condition, and may have a higher chance of selling quickly.