# Used 2018 Mercedes-Benz GLS prices

> The average asking price for a used 2018 Mercedes-Benz GLS is $20,808, with 100,982 miles on average, across 97 cars for sale at U.S. dealers as of Nov 10, 2026.

Data as of Nov 14, 2026 · [ottoquest.com](https://ottoquest.com/models/mercedes-benz-gls/2018) · [all Mercedes-Benz GLS model years](https://ottoquest.com/models/mercedes-benz-gls.md)

- Average asking price: $20,808 (median $19,995)
- Average miles: 100,982
- For sale now: 97
- Average days listed: 98 (of 89 with a listing date)

## 2018 Mercedes-Benz GLS prices by state

States with 5 or more cars for sale.

| State | Average asking | Average miles | For sale | Days listed |
| --- | ---: | ---: | ---: | ---: |
| Texas | $23,331 | 93,063 | 10 | 77 |
| Georgia | $18,168 | 109,147 | 7 | 74 |
| New Jersey | $24,592 | 99,517 | 6 | 74 |
| North Carolina | $17,393 | 124,015 | 6 | 91 |
| California | $20,453 | 100,724 | 6 | 135 |
| Massachusetts | $20,558 | 101,220 | 6 | 89 |
| Virginia | $18,348 | 104,834 | 5 | 74 |

## Other Mercedes-Benz GLS years

| Year | Average asking | Miles | For sale |
| --- | ---: | ---: | ---: |
| [2027](https://ottoquest.com/models/mercedes-benz-gls/2027.md) | $104,590 | 14 | 2,701 |
| [2026](https://ottoquest.com/models/mercedes-benz-gls/2026.md) | $110,142 | 743 | 1,600 |
| [2025](https://ottoquest.com/models/mercedes-benz-gls/2025.md) | $89,442 | 15,777 | 153 |
| [2024](https://ottoquest.com/models/mercedes-benz-gls/2024.md) | $71,342 | 30,682 | 185 |
| [2023](https://ottoquest.com/models/mercedes-benz-gls/2023.md) | $65,077 | 38,949 | 111 |
| [2022](https://ottoquest.com/models/mercedes-benz-gls/2022.md) | $49,203 | 53,194 | 88 |
| [2021](https://ottoquest.com/models/mercedes-benz-gls/2021.md) | $42,635 | 67,051 | 93 |
| [2020](https://ottoquest.com/models/mercedes-benz-gls/2020.md) | $33,280 | 81,627 | 116 |
| [2019](https://ottoquest.com/models/mercedes-benz-gls/2019.md) | $23,573 | 84,457 | 112 |
| **2018** | $20,808 | 100,982 | 97 |
| [2017](https://ottoquest.com/models/mercedes-benz-gls/2017.md) | $17,748 | 109,139 | 192 |

## Used 2018 Mercedes-Benz GLS prices: common questions

### What is a fair price for a used 2018 Mercedes-Benz GLS?

Used 2018 Mercedes-Benz GLSs for sale at U.S. dealers ask $20,808 on average (half ask less than $19,995), across 97 cars. The cars for sale have 100,982 miles on average: one with fewer miles is worth more, and one with more is worth less. To check one car's price against cars of its trim and mileage, enter its VIN in OttoQuest's free Deal Check.

### How long are used 2018 Mercedes-Benz GLSs for sale?

The 89 for sale with a listing date have been listed 98 days on average. A car listed much longer than that, or one whose price has already been cut, usually leaves more room to negotiate.

### How does the 2018 Mercedes-Benz GLS compare with the 2017 and 2019?

The 2018 asks $20,808 on average with 100,982 miles; the 2017 asks $17,748 with 109,139 miles, and the 2019 asks $23,573 with 84,457 miles.

## More

- Check one car's price: https://ottoquest.com/deal-check.md?vin=<VIN>&price=<price>&mileage=<miles> (markdown; the page is https://ottoquest.com/deal-check)
- Value a car by model, trim, year and mileage: https://ottoquest.com/value
- Free alerts for new listings and price drops: https://ottoquest.com/deals

Used and certified cars for sale at U.S. dealers, each car counted once. Days listed are the dealer's own days on market where they publish it. Price moves compare the same cars at both ends of the window.

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OttoQuest · [this page](https://ottoquest.com/models/mercedes-benz-gls/2018). Prices are asking prices of cars for sale in the U.S. and recorded sold prices; a guide to the price, not to a car's condition.