How much does the 2020 Mercedes-Benz GLS cost?

Prices have softened 13.76% compared to this time last year, making it a favorable time to shop this model year.

There are 774 listings available, which suggests you have a meaningful amount of inventory to compare.

If you find a listing below $33,408.62, 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 for this model year.

The 2020 GLS is described as the roomiest vehicle in the Mercedes-Benz lineup, with three rows of seating for six or seven people and up to 94 cubic feet of cargo space. It also aims to blend S-Class-like comfort with SUV versatility, so you get a luxury-first three-row layout that still has broader everyday appeal than a typical family hauler.

For you, that means this model fits best if you want a large, comfortable SUV with a flexible cabin and a strong emphasis on refinement. 35.0% 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 adds meaningful technology and refinement, including a new wide-screen cabin, MBUX, and a generous standard equipment list. It also brings a new 3.0-liter inline-six with EQ Boost, which Mercedes says improved fuel economy versus the prior model year.

For used buyers, the main long-term ownership risk is less about basic appeal and more about making sure the vehicle has been maintained carefully, since luxury features and complex systems can be costly if neglected.

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

Accident-free inventory is solid at 75.8% — always verify the vehicle history report.

You should start with a history report to confirm accident status and look for any signs of prior damage or inconsistent ownership records. Then prioritize a thorough inspection of the cabin electronics, seating functions, and convenience features, since this model leans heavily on technology and power-operated equipment.

You should also focus on overall condition and how the SUV has been used, because a large luxury three-row vehicle can show wear in the seats, cargo area, and interior trim faster than you might expect.

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 opportunities.

• Deal availability: 35.0% of listings are priced as good or great deals.
• Inventory: There are 774 listings available.
• Price trend: Prices have softened 13.76% compared with last year.
• Clean inventory: 75.8% of listings are accident-free.

If you find a listing below $33,408.62, 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 $33,385 sits slightly below last year's $38,713.

That price movement suggests the market has already absorbed a meaningful amount of depreciation, which can help future resale if you buy at the right price. If you pay close to the lower end of the range, you may have a better chance of limiting your loss when it comes time to sell.

The GLS also has a strong value proposition for shoppers who want a spacious luxury SUV, and that kind of broad appeal can help support demand later. 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:

• 35.0% of listings are priced as good or great deals.
• Accident-free inventory is solid at 75.8% — always verify the vehicle history report.
• Price trend: Prices have softened 13.76% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2021 if:

• At $48,356, the 2021 costs more than the current year's $33,385 average.
• It adds a more luxury-first feel with stronger emphasis on comfort and refinement.

The bottom line: If you want the better value play, the 2020 is the smarter starting point because pricing has eased and inventory is available. If your budget stretches higher and you want the newer-year premium experience, the 2021 is the secondary path to consider.

These recommendations are based on CarGurus' proprietary market data from August 21, 2026, CarGurus experts' opinions, and generative AI.