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Used
2021 Mercedes-Benz GLC 300
for sale
near
Williston Park, NY
- 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.






Mercedes-Benz Certified
2021 Mercedes-Benz GLC 300 Base 4MATIC
Vehicle information
Features
Reviews
The best salesman
Giovanni is one of the best salesman that I have ever met he does a great job ..I bought about four cars off of Him he does great service. And gets the deal done. ….
Shout out to Genesis for helping us get our dream car ,
Shout out to Genesis for helping us get our dream car , she was very honest , helpful , charismatic ! Anyone will like to buy a Car from her , and she did every single think to make sure my car was clean and in good condition . Also I love my car very comfortable.






Used
2021 Mercedes-Benz GLC 300 4MATIC Coupe
Vehicle information
Features
Reviews
We always have a great experience at this dealership!
We always have a great experience at this dealership! Bobby has consistently taken amazing care of us over the years, and we couldn’t be more grateful. Sally Morshed and Seth have also been exceptional throughout every step of the process—professional, attentive, and genuinely helpful. What really sets this group apart is their honesty and integrity. They’re not just trying to sell us something—they truly care about doing what’s right, even in today’s world where costs are rising everywhere. We sincerely appreciate the time, effort, and genuine care they put into every visit. A fantastic team all around!
2021 GLC300 4matic
I absolutely love this compact SUV! Coming from a Subaru Outback, this is light years above and beyond for same year. A quiet cabin is my top want for buying a car. This cabin is quiet and relaxing inside. I’m tall and there is plenty of room. The seats are incredible! Can’t wait to take it on the roads in winter.






Mercedes-Benz Certified
2021 Mercedes-Benz GLC 300 Base 4MATIC
Vehicle information
Features
Reviews
Look at that smile !
Look at that smile !! Thank You Jerry Sherry for Maureen's 2024 GLC300 ! Amazing customer experience. Ralley Motors are the absolutely best in the industry. We will definitely be back for the next purchase.
GLC43AMG
I have the GLC43 AMG and it's awsome! It has plenty of guts and is extremely comfortable. I would highly recommend this vehicle to anyone.






Used
2021 Mercedes-Benz GLC 300 Base
Vehicle information
Features
Reviews
Great experience dealing with Rafael got what I wanted
Great experience dealing with Rafael got what I wanted definitely will be back in the future
Exceptional Comfort
I have had this vehicle for only one month so have not developed much experience with it. I did take it on a 1400 mile trip two days after purchase. It ran well, was very comfortable to drive, made for a very easy trip, was great on gas mileage, and it is very quiet inside the cabin. Seat comfort is exceptional and this, being our first experience with heated seats and steering wheel, was most enjoyable.






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
Overall Great Experience from start to finish.
Overall Great Experience from start to finish. Elder and Ralphie communicated with us every step of the way and made the process of buying our car seamlessly. They both were friendly and professional. I would definitely recommend Stream Auto outlet in Islip if you’re looking for a great selection and team. Mark & Jenny
Great vehicle
This car has everything technology offers in it plus more. The feel of this vehicle is extremely smooth snd quiet. One of the best purchases of ever made. I’m extremely pleased and love it






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features




Used
2021 Mercedes-Benz GLC 300 Base 4MATIC
Vehicle information
Features
Reviews
Very friendly family owned auto dealership.
Very friendly family owned auto dealership. Dave were very accommodating with our situation and gave us a fantastic car at a great price.






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
Michael D’Lois is professional and knowable I asked him
Michael D’Lois is professional and knowable I asked him about my car warranty He checked and explained the oil change was under my car warranty. New filters will cost me. I will definitely give Michael 10 stars. All the Nissan staff greet you with a smile and warm hello…






Used
2021 Mercedes-Benz GLC 300 Base 4MATIC
Vehicle information
Features
Reviews
Purchased a car via web.
Purchased a car via web. Assigned sales associate, Sunni Wang was very professional and responsive and made the transaction enjoyable.






Mercedes-Benz Certified
2021 Mercedes-Benz GLC 300 4MATIC Coupe
Vehicle information
Features
Reviews
Salute to Mr. David Garcia, MBenz Sales Associate
I highly commend Mr. David Garcia for his knowledgeable, professionalism and caring follow-up manner in which he demonstrated, during the purchase of my Mercedes Benz. Although I was disappointed in dealing with the sales/financial manager for his inappropriate, condescending attitude, Mr Garcia was able to diffuse our differences and finalize the purchase.






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
Ryan Lewis was a very considerate and professional sales
Ryan Lewis was a very considerate and professional sales person. The financial department Was very polite and professional as well. The dealership is always very clean and welcoming. I would recommend people to the Riverside dealership. Thank you.






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
I had an excellent experience at Fast Track Motors.
I had an excellent experience at Fast Track Motors. From the moment I walked in, the staff was friendly, knowledgeable, and genuinely helpful. They took the time to understand what I was looking for and helped me find a vehicle that fit my needs and budget perfectly. The buying process was smooth, transparent, and pressure-free. I appreciated how clearly everything was explained, and there were no hidden fees or surprises. The vehicle I purchased was in great condition, clean, and exactly as advertised. What really stood out was their customer service—responsive, professional, and honest. Even after the sale, they followed up to ensure I was happy with my purchase and answered any questions I had. I highly recommend Fast Track Motors to anyone looking for a quality vehicle and a dealership that truly cares about its customers. I’ll definitely be returning for future purchases!






Used
2021 Mercedes-Benz GLC 300 Base 4MATIC
Vehicle information
Features
Reviews
Excellent service.
Excellent service. Great place. Great people. Fresh coffee and muffins, bagels etc. They take care of you like a family. Carlos is the best.






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
We’ve been buying cars here for the last 6 years.
We’ve been buying cars here for the last 6 years. My go to place to purchase all my cars. Everyone is friendly.






Used
2021 Mercedes-Benz GLC 300 Base
Vehicle information
Features
Reviews
Customer service by Mitsubishi sales
It was great I didn't feel pressure by the sales person Can you inform me of a lot of things I didn't know made me Trust the information he was giving me






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
It has been a pleasure working alongside Carlos at stream
It has been a pleasure working alongside Carlos at stream auto. He and his team made it an easy smooth transition for me to leave there with a great car and a smile on my face thanks again team five stars to Carlos






Used
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
The absolute best dealer I’ve been to by far in my search
The absolute best dealer I’ve been to by far in my search ! Low prices clean cars and low interest rate!!! Will refer my cousin to you as he’s looking to buy next week! Thanks Euro A++






Used
2021 Mercedes-Benz GLC 300 4MATIC Coupe
Vehicle information
Features
Reviews
Overall great experience.
Overall great experience. Salesman Jean was great to work with. Got a lower price than I was expecting and am very happy with my car






Mercedes-Benz Certified
2021 Mercedes-Benz GLC 300 4MATIC
Vehicle information
Features
Reviews
Quick response and knowledge in answering all my
Quick response and knowledge in answering all my questions. Unfortunately, the vehicle I was interested in purchasing was sold.
Mercedes-Benz GLC 300 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 Mercedes-Benz GLC 300 | $52,586 | |
2025 Mercedes-Benz GLC 300 | $46,960 | 15 Great deals |
2023 Mercedes-Benz GLC 300 | $33,993 | 11 Good deals |
2022 Mercedes-Benz GLC 300 | $20,488 | 53 Great deals |
2020 Mercedes-Benz GLC 300 | $15,133 | 10 Great deals |
2019 Mercedes-Benz GLC 300 | $16,425 | 11 Great deals |
2018 Mercedes-Benz GLC 300 | $15,785 | 7 Great deals |
About the 2021 Mercedes-Benz GLC 300
Base shown (base trim).
- Seating
- 5
- Door count
- 4
- Drivetrain
- Rear-wheel drive
- Combined MPG
- 25
- Transmission
- 9-Speed A/T
- Engine
- 255.0-hp, 2.0-liter, 4 Cylinder Engine (Gasoline Fuel)

How much does the 2021 Mercedes-Benz GLC 300 cost?
The 2021 Mercedes-Benz GLC 300 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2021 GLC 300 is $27,470, with pricing starting at $13,952.
What is the MPG of the 2021 Mercedes-Benz GLC 300?
The 2021 Mercedes-Benz GLC 300 offers up to 22 MPG in city driving and 29 MPG on the highway for a combined rating of 25 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 GLC 300?
The 2021 Mercedes-Benz GLC 300 compares to and/or competes against the following vehicles:
Is the 2021 Mercedes-Benz GLC 300 reliable?
The 2021 Mercedes-Benz GLC 300 has an average reliability rating of 4.4 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 GLC 300 owners.
Is the 2021 Mercedes-Benz GLC 300 a good SUV?
Below are the Cars.com consumer ratings for the 2021 Mercedes-Benz GLC 300.
- Comfort 4.7
- Interior 4.7
- Performance 4.5
- Value 4.4
- Exterior 4.8
- Reliability 4.4
81% of drivers recommend this car
- Comfort 4.7
- Interior 4.7
- Performance 4.5
- Value 4.4
- Exterior 4.8
- Reliability 4.4
GLC 300 (3 styles)
Style | ||
---|---|---|
GLC 300 4MATIC Coupe | GLC 300 4MATIC SUV | GLC 300 SUV |
Inventory price | ||
Starting at $51,650 | Starting at $45,200 | Starting at $43,200 |
Combined MPG | ||
24 | 23 | 25 |
Engine | ||
255.0-hp, 2.0-liter, 4 Cylinder Engine (Gasoline Fuel) | 255.0-hp, 2.0-liter, 4 Cylinder Engine (Gasoline Fuel) | 255.0-hp, 2.0-liter, 4 Cylinder Engine (Gasoline Fuel) |
*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.
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Mercedes-Benz GLC 300 trims
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Mercedes-Benz GLC 300 2021 4MATIC
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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.