Used 2021 Mercedes-Benz GLS for Sale near Philadelphia, PA
195 results
CarGurus Analysis:
2021 Mercedes-Benz GLS
With 194 currently listed for sale near Philadelphia, PA and an average price of $47,679.00, 29.9% of 2021 Mercedes-Benz GLS models for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2021 Mercedes-Benz GLS 4.93 / 5 stars.
88.1% of 2021 GLS models on CarGurus are accident free.
The 2021 Mercedes-Benz GLS sets a high standard for luxury in full-size SUVs, offering spacious seating, advanced technology features, and impressive performance.
CarGurus Analysis: 2021 Mercedes-Benz GLS
overall

Summary
With 194 currently listed for sale near Philadelphia, PA and an average price of $47,679.00, 29.9% of 2021 Mercedes-Benz GLS models for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2021 Mercedes-Benz GLS 4.93 / 5 stars.
88.1% of 2021 GLS models on CarGurus are accident free.
The 2021 Mercedes-Benz GLS sets a high standard for luxury in full-size SUVs, offering spacious seating, advanced technology features, and impressive performance.
Why it stands out
The 2021 Mercedes-Benz GLS-Class stands out in the full-size luxury SUV market due to its combination of class-leading comfort, advanced technology, and a range of powerful engine options. It is designed to deliver a high level of luxury akin to the renowned S-Class sedan, evident in its expansive and well-crafted interior. With three rows of spacious seating, the GLS provides ample room for passengers and cargo, significantly enhancing its appeal. Notably, the GLS-Class incorporates the new MBUX infotainment system featuring a large touch screen and voice command recognition, allowing for a more user-friendly experience compared to previous models. While it excels in many areas, potential buyers should note the cramped third row and the sometimes unintuitive technology controls, along with its less favorable fuel efficiency ratings. Overall, the 2021 GLS-Class impressively suits families and those seeking a high-end vehicle with robust capabilities.
Other model years to consider
- Average price: $74,968.00
- Good/great deal percentage: 24.4%
- User rating: 5 / 5
- Total listings: 201
- Average price: $49,375.00
- Good/great deal percentage: 31.0%
- User rating: 5 / 5
- Total listings: 210
- Average price: $18,398.00
- Good/great deal percentage: 30.3%
- User rating: 4.75 / 5
- Total listings: 165
This analysis is based on CarGurus' proprietary market data from April 7, 2026, CarGurus experts' opinions, and generative AI.
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4.7 Overall rating
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Wilber R
Reviewed a 2021 Mercedes-Benz GLS on Sep 4, 2024
Excellent car, very good finish full of attributes, spacious.
James C
Reviewed a 2021 Mercedes-Benz GLS on Dec 22, 2022
I feel that the features listed for this vehicle is good. I just didnt see one option that would have made me buy the vehicle fast. I did not see the multi contour massage feature. I wished that it would have been made clear on the listing.
Michelle A
Reviewed a 2021 Mercedes-Benz 450 4MATIC on Apr 8, 2023
Very nice ride, drives so well and well built. I love it so far!!
2021 Mercedes-Benz GLS Trims
| Trim type | MSRP |
|---|---|
| 450 4MATIC | $76,000 |
| AMG GLS 63 4MATIC AWD | $132,100 |
| 580 4MATIC | $98,850 |
| 600 Mercedes-Maybach 4MATIC | $160,500 |
2021 Mercedes-Benz GLS Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2021 Mercedes-Benz GLS prices has changed over time.
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