Used 2017 Mercedes-Benz GLS for Sale nearPhiladelphia, PA

How much does the 2017 Mercedes-Benz GLS cost?

Prices have softened 10.03% compared to this time last year, making it a favorable time to shop this model year.

There are 697 listings available, which suggests a decent amount of inventory to compare before you buy.

Is the 2017 Mercedes-Benz GLS a good car?

Yes — the 4.61/5 user rating points to strong owner satisfaction. Owners consistently praise its impressive power, comfort, and engineering quality, and they also like the smooth, powerful performance and stylish design. For you, that makes sense if you want a large, upscale three-row SUV that prioritizes luxury and capability over maximum space. With 34.0% of listings marked as good or great deals, there is still some room to shop selectively.

Is the 2017 Mercedes-Benz GLS reliable?

Owners rate it 4.61/5, a strong signal of long-term satisfaction.

Owner feedback also points to a dependable-feeling ownership experience, with praise for its engineering quality and smooth performance. That said, used luxury SUVs can carry higher long-term ownership risk if maintenance has been deferred, so you should pay close attention to service history and overall condition before committing.

What should I look for when buying a used 2017 Mercedes-Benz GLS?

At 65.3% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and confirm whether any reported damage was repaired properly. Then prioritize a pre-purchase inspection, especially for suspension, electronics, and interior wear, since those areas matter most in a luxury SUV like this. Focus on overall condition and maintenance records, because a well-kept example is likely to be a better ownership experience than one that simply looks good in photos.

Is now a good time to buy a used 2017 Mercedes-Benz GLS?

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

• Deal availability: 34.0% of listings are priced as good or great deals.
• Inventory: There are 697 listings available.
• Price trend: Prices have softened 10.03% compared with last year.
• Clean inventory: 65.3% of listings are accident-free.

If you find a listing below $18,059, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2017 Mercedes-Benz GLS's resale value?

The current average of $18,059 sits slightly below last year's $20,073.

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, it also means resale value may depend heavily on condition, mileage, and documentation rather than just the badge alone. Well-kept examples should hold up better than neglected ones, especially in a segment where buyers expect strong luxury presentation.

Vehicles with strong owner satisfaction ratings, like this model year's 4.61/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2017 Mercedes-Benz GLS or consider a different year?

If you're weighing the 2017 against nearby model years, here's how to think about it:

Choose the 2017 if:

• 34.0% of listings are priced as good or great deals.
• At 65.3% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 10.03% compared with last year.
• Owners rate it 4.61/5 — a strong satisfaction signal.

The bottom line: The 2017 is a solid choice if you want a large, comfortable, three-row luxury SUV and you find a well-documented example at a competitive price. If you are especially price-sensitive, you may want to compare it with nearby years and focus on the cleanest, best-maintained listing rather than chasing the lowest sticker alone.

These recommendations are based on CarGurus' proprietary market data from September 15, 2026, CarGurus experts' opinions, and generative AI.