Used 2018 Mercedes-Benz GLS for SaleNationwide

How much does the 2018 Mercedes-Benz GLS cost?

Prices have softened 16.87% compared to this time last year, making it a favourable time to shop this model year.

There are 50 listings available, which suggests you have a reasonable amount of inventory to compare.

Is the 2018 Mercedes-Benz GLS a good car?

Yes — the 4.8/5 user rating points to strong owner satisfaction. Owners consistently praise its luxurious features, comfort, and performance, and they also like the power delivery and the electronic features that improve the driving experience. For you, that means this GLS makes the most sense if you want a large, family-focused luxury SUV with three rows of seating and up to 2,400 litres of cargo space. With 36% of listings marked as good or great deals, there is still some room to shop selectively.

Is the 2018 Mercedes-Benz GLS reliable?

Owners rate it 4.8/5, a strong signal of long-term satisfaction.

The owner feedback points to a vehicle that feels dependable in day-to-day use, especially if you value comfort, power, and a well-equipped cabin. The strongest long-term ownership case comes from the combination of high satisfaction and the GLS’s reputation for delivering a premium driving experience over time. For used buyers, the main risk is making sure the specific example you choose has been maintained well, since a luxury SUV like this can be costly if deferred upkeep has piled up.

Is now a good time to buy a used 2018 Mercedes-Benz GLS?

This looks like a moderate, selective buyer’s market, so you can shop with some leverage if you know what you want.

• Deal availability: 36% of listings are priced as good or great deals.
• Inventory: There are 50 listings available.
• Price trend: Prices have softened 16.87% compared with last year.

If you find a listing below $30,747 CAD, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 Mercedes-Benz GLS's resale value?

The current average of $30,747 CAD sits slightly below last year's $36,986 CAD.

That price movement suggests the market has already adjusted downward, which can make the GLS more attractive to you as a buyer but less favourable if you're planning to sell soon. If you own one for the long term, the current pricing may help support demand from shoppers looking for a well-equipped luxury SUV at a lower entry point. The fact that the model is still drawing solid owner satisfaction also helps keep interest alive in the used market.

Vehicles with strong owner satisfaction ratings, like this model year's 4.8/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 Mercedes-Benz GLS or consider a different year?

If you're weighing the 2018 against nearby model years, here's how to think about it:

Choose the 2018 if:

• 36% of listings are priced as good or great deals.
• Price trend: Prices have softened 16.87% compared with last year.
• Owners rate it 4.8/5 — a strong satisfaction signal.

The bottom line: If you want the best mix of value, owner satisfaction, and current market softness, the 2018 is the primary year to target. If you're especially price-sensitive, you can also compare nearby years to see whether a lower asking price outweighs the 2018's stronger deal availability and satisfaction signal.

How does the 2018 Mercedes-Benz GLS compare to the 2019 BMW X7?

These recommendations are based on CarGurus' proprietary market data from November 10, 2026, CarGurus experts' opinions, and generative AI.