Used 2018 Mercedes-Benz GLS for Sale near Saint Louis, MO
168 results
CarGurus Analysis:
2018 Mercedes-Benz GLS
With 165 currently listed for sale near Saint Louis, MO and an average price of $19,995.00, 26.7% of 2018 Mercedes-Benz GLS models for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2018 Mercedes-Benz GLS 4.8 / 5 stars.
66.7% of 2018 GLS models on CarGurus are accident-free.
The 2018 Mercedes-Benz GLS offers luxurious features, ample cargo space, and powerful performance, making it an excellent choice for families.
CarGurus Analysis: 2018 Mercedes-Benz GLS

Summary
With 165 currently listed for sale near Saint Louis, MO and an average price of $19,995.00, 26.7% of 2018 Mercedes-Benz GLS models for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2018 Mercedes-Benz GLS 4.8 / 5 stars.
66.7% of 2018 GLS models on CarGurus are accident-free.
The 2018 Mercedes-Benz GLS offers luxurious features, ample cargo space, and powerful performance, making it an excellent choice for families.
Why it stands out
The 2018 Mercedes-Benz GLS stands out as a spacious and luxurious three-row SUV that combines the comfort and sophistication of a sedan with a robust level of practicality for families. With up to 94 cubic feet of cargo space when the seats are folded down, this vehicle is ideally suited for those needing room for people and gear. Owners highlight the power delivery and advanced electronic features that enhance the driving experience. While there are some concerns regarding the interior space being slightly less than expected, the overall feedback regarding comfort and features is overwhelmingly positive. Dominating the luxury SUV segment, the GLS competes effectively with rivals like the Audi Q7 and BMW X7, providing both performance and prestige.
Other model years to consider
- Average price: $81,425.00
- Good/great deal percentage: 29.5%
- User rating: 5 / 5
- Total listings: 166
- Average price: $52,600.00
- Good/great deal percentage: 29.5%
- User rating: 5 / 5
- Total listings: 146
- Average price: $79,199.00
- Good/great deal percentage: 31.1%
- Total listings: 148
This analysis is based on CarGurus' proprietary market data from June 2, 2026, CarGurus experts' opinions, and generative AI.
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4.8 Overall rating
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Anonymous
Reviewed a 2018 Mercedes-Benz GLS on Jan 9, 2021
Unbelievable vehicle. Has every electronic feature you can imagine, plus a few you cant. Driving it is like floating on a magic carpet. Way more power than I need. Most comfortable car Ive ever owned. All in all I couldnt be happier.
Anonymous
Reviewed a 2018 Mercedes-Benz GLS on Dec 28, 2021
The only improvements would be to add a phone charger somewhere other than just in the storeage console.. I would also prefer a roach screen for the navigation system. Other than those additions, I love it!
Anonymous
Reviewed a 2018 Mercedes-Benz GLS on Feb 17, 2021
Great Car. Plenty of power. Good gas mileage Room for dog crate in back of seats
Anonymous
Reviewed a 2018 Mercedes-Benz GLS on Feb 10, 2021
Thought it would have been more spacious, but the volume was added behind the driver’s seat. The front of the vehicle is the size of a GLE Class, 5 passenger vehicle.
2018 Mercedes-Benz GLS Trims
| Trim type | MSRP |
|---|---|
| 450 4MATIC | $69,550 |
| 550 4MATIC | $94,950 |
| AMG GLS 63 4MATIC | $125,300 |
2018 Mercedes-Benz GLS Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2018 Mercedes-Benz GLS prices has changed over time.
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