How much does the 2020 Mercedes-Benz GLS cost?

Prices have softened 13.45% compared to this time last year, making it a favorable time to shop this model year.

There are 772 listings available, which suggests you have a workable amount of inventory to compare.

If you find a listing below $33,313.76, that's toward the low end of the year-round range and worth acting on quickly.

Is the 2020 Mercedes-Benz GLS a good car?

Yes — the 5/5 user rating points to strong owner satisfaction, and the 2020 GLS backs that up with a roomy three-row layout, up to 94 cubic feet of cargo space, and a comfort-focused cabin. It is also positioned as a midsize SUV that blends S-Class-like comfort with some off-road capability, so you get a broader use case than a typical family hauler. For you, that means it makes the most sense if you want a large luxury SUV that prioritizes space, refinement, and flexibility. 28.4% of listings are priced as good or great deals, which gives you some room to shop selectively.

Is the 2020 Mercedes-Benz GLS reliable?

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

The 2020 GLS emphasizes comfort and practicality with a flexible seating setup, generous standard equipment, and a cabin built around convenience. It also includes features that make loading passengers or cargo easier, which supports everyday usability. For used buyers, the main long-term ownership risk is that a large luxury SUV can become expensive to keep in top condition if prior maintenance was inconsistent.

What should I look for when buying a used 2020 Mercedes-Benz GLS?

Accident-free inventory is solid at 76.4% — always verify the vehicle history report.

You should prioritize a history report first, then focus on a pre-purchase inspection that checks the condition of the seating mechanisms, electronics, and convenience features. Because this model is built around comfort and flexibility, pay close attention to how well the cabin functions in real use, especially the second- and third-row folding and adjustment features. Also inspect for signs of wear that could affect a luxury SUV’s ownership costs over time.

Is now a good time to buy a used 2020 Mercedes-Benz GLS?

This looks like a moderate, selective buyer’s market, so you can shop carefully and still find value.

• Deal availability: 28.4% of listings are priced as good or great deals.
• Inventory: There are 772 listings available.
• Price trend: Prices have softened 13.45% compared with last year.
• Clean inventory: 76.4% of listings are accident-free.

If you find a listing below $33,313.76, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2020 Mercedes-Benz GLS's resale value?

The current average of $33,312 sits slightly below last year's $38,489.

That price movement suggests the market has already adjusted downward, which can help you buy at a more favorable entry point. For a future seller, that also means resale value will depend heavily on how well the vehicle is maintained and presented. If you keep mileage, condition, and history strong, you improve your odds of standing out in a market where buyers have options.

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

Should I buy a 2020 Mercedes-Benz GLS or consider a different year?

If you're weighing the 2020 against nearby model years, here's how to think about it:

Choose the 2020 if:

• 28.4% of listings are priced as good or great deals.
• Accident-free inventory is solid at 76.4% — always verify the vehicle history report.
• Price trend: Prices have softened 13.45% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2021 if:

• At $47,685, the 2021 costs more than the current year's $33,312 average.
• It adds a more luxury-first, S-Class-like feel with stronger emphasis on premium refinement.

The bottom line: If you want the better value play, the 2020 is the smarter starting point because it combines strong satisfaction, solid inventory, and a lower average price. If you are willing to pay more for a newer model year and a more upscale luxury emphasis, the 2021 is the better secondary path.

These recommendations are based on CarGurus' proprietary market data from August 28, 2026, CarGurus experts' opinions, and generative AI.