Used 2020 Mercedes-Benz GLS for Sale near Pennsylvania

How much does the 2020 Mercedes-Benz GLS cost?

Prices have softened 15.07% compared to this time last year, making it a favorable time to shop this model year.

There are 742 listings available, which suggests you have a meaningful amount of inventory to compare.

Is the 2020 Mercedes-Benz GLS a good car?

Yes — the 5/5 user rating points to strong owner satisfaction. The 2020 GLS stands out as the roomiest vehicle in Mercedes-Benz’s lineup, with three rows of seating for six or seven people and up to 94 cubic feet of cargo space. It also blends S-Class-like comfort with utility, which makes it especially appealing if you want a luxury SUV that can handle family duty without feeling compromised. With 35.7% of listings marked as good or great deals, you have 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 a new generation’s worth of comfort and safety features, along with a more efficient mild-hybrid powertrain and generous standard equipment. That combination suggests a well-rounded ownership experience if you prioritize refinement and everyday usability. For used buyers, the main long-term risk is making sure the vehicle’s condition and maintenance history match its premium positioning.

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

Accident-free inventory is solid at 75.6% — always verify the vehicle history report.

You should prioritize a history report first, then focus on a thorough pre-purchase inspection. Pay close attention to the condition of the third-row access, touch-sensitive controls, and any signs of wear in the cabin and cargo area. Because this SUV is built around luxury and technology, you’ll want to confirm that all comfort, convenience, and safety features work as intended.

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: 35.7% of listings are priced as good or great deals.
• Inventory: There are 742 listings available.
• Price trend: Prices have softened 15.07% compared with last year.
• Clean inventory: 75.6% of listings are accident-free.

If you find a listing below $32,729, 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 $32,740 sits slightly below last year's $38,550.

That price movement suggests the market has already adjusted downward, which can help future resale if you buy at the right number. If you pay close to the current average, your depreciation risk is likely lower than it would have been a year ago. Strong demand for a roomy, luxury three-row SUV can also help support values when the vehicle is well kept.

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:

• 35.7% of listings are priced as good or great deals.
• Accident-free inventory is solid at 75.6% — always verify the vehicle history report.
• Price trend: Prices have softened 15.07% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2021 if:

• At $47,956, the 2021 costs more than the current year's $32,740 average.
• It adds a more luxury-first character with multiple powertrain options.

The bottom line: If you want the better value, the 2020 is the stronger starting point because it combines a lower average price with solid deal availability and strong owner satisfaction. If you’re willing to spend more for a newer model-year experience, the 2021 is the better secondary path for buyers who prioritize a more upscale feel over price.

These recommendations are based on CarGurus' proprietary market data from September 11, 2026, CarGurus experts' opinions, and generative AI.