Used 2020 Mercedes-Benz GLB for Sale near Washington

How much does the 2020 Mercedes-Benz GLB cost?

Prices have softened 11.00% compared to this time last year, making it a favorable time to shop this model year.

There are 504 listings available, which suggests you have a decent amount of inventory to compare.

Is the 2020 Mercedes-Benz GLB a good car?

Generally — the 2020 Mercedes-Benz GLB earns a 4.14/5 user rating and an 8.5/10 expert rating. The model scores 10/10 across Form and function, Technology, and Safety.

Owners consistently praise its premium features, great design, and versatility, and they also like its comfortable size and useful everyday packaging. The GLB’s appeal is strongest if you want a small luxury SUV that feels practical without giving up a premium cabin or strong tech.

The trade-offs are that the brakes are lacking and the features many shoppers want can push the price up significantly. That fits the GLB’s role as a utility-first luxury SUV: it gives you a lot of usefulness and polish, but the best-equipped versions can get expensive quickly.

The market also looks reasonably supportive, with 34.3% of listings marked as good or great deals.

Is the 2020 Mercedes-Benz GLB reliable?

Owners rate it 4.14/5, a solid signal of long-term satisfaction.

The owner feedback points to a vehicle that feels dependable in daily use, with praise for its versatility and comfortable size. Reviewers also describe it as a model you can count on for premium-feeling practicality, and the expert evaluation reinforces that it delivers a composed, refined ownership experience.

The GLB’s standard maintenance coverage includes free emergency call service for as long as you own it, which is a nice ownership perk. For used buyers, the main long-term risk is less about outright durability and more about how much complexity and option content you’re taking on.

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

Accident-free inventory is solid at 81.3% — always verify the vehicle history report.

You should still check the history report carefully, because a clean listing percentage does not replace a proper records review. Prioritize a pre-purchase inspection that focuses on brake condition, since the GLB’s brakes are a known weak point. It also makes sense to pay close attention to how the cabin materials, electronics, and option packages were treated, because the GLB’s value depends heavily on equipment and condition.

Key things to evaluate:

• Trim level: The GLB 250 and GLB 250 4Matic are the two specification levels mentioned, and the 4Matic version adds all-wheel drive. The base setup is already practical, but the premium feel rises quickly with options, so you should compare equipment carefully before paying more.
• Powertrain: Both versions use a turbocharged 2.0-liter four-cylinder engine with 221 horsepower and 258 lb-ft of torque, paired with an eight-speed dual-clutch automatic transmission. The 4Matic setup sends power rearward as needed for grip, and an Off-Road driving mode locks in a 50:50 split.
• Safety package: Standard equipment includes a driver monitoring system, backup camera, forward collision warning with pedestrian detection, automatic emergency braking, and Pre-Safe front collision preparation. The optional Driver Assistance Package adds adaptive cruise control, lane-centering assistance, evasive steering assistance, automatic emergency stop assistance, and additional Pre-Safe enhancements.
• Infotainment: The GLB uses the MBUX system with Android Auto and Apple CarPlay, plus natural voice recognition. The standard screens are 7 inches, while the Premium Package upgrades to twin 10.25-inch displays under one piece of glass; navigation with augmented video is available with the Multimedia Package.
• Fuel efficiency: The expert test loop returned 21.4 mpg, and the expected EPA estimate was 26 mpg.

Which 2020 Mercedes-Benz GLB trim should I buy?

The 2020 Mercedes-Benz GLB is offered in 2 trim levels: GLB 250 and GLB 250 4Matic.

Here's the short version:

• GLB 250: This is the entry point, and it gives you the GLB’s core strengths: a turbocharged 2.0-liter engine, strong practicality, and the same premium cabin character that makes the model appealing. It makes the most sense if you want the lowest starting cost and do not need all-wheel drive.
• GLB 250 4Matic: This is the better choice if you want the added traction of all-wheel drive and the more confident all-weather setup. It is the version to target if you expect to drive in poor weather or want the more secure-feeling drivetrain.

The optional Driver Assistance Package adds the most advanced safety tech, while the Premium Package is the upgrade most worth considering for its larger twin displays and added convenience features.

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

This is a moderate, selective-buyer market, so you have room to shop carefully without rushing.

• Deal availability: 34.3% of listings are priced as good or great deals.
• Inventory: There are 504 listings available.
• Price trend: Prices have softened 11.00% compared with last year.
• Clean inventory: 81.3% of listings are accident-free.

If you find a listing below $20,503, that's toward the low end of the year-round range and worth acting on quickly.

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

The current average of $20,503 sits slightly below last year's $23,038.

That price movement suggests the GLB has already absorbed a meaningful amount of depreciation, which can help future resale stability if you buy at the right price. For a seller, the current market is a reminder that option content and condition matter a lot, because buyers will compare your GLB against similarly priced luxury SUVs with strong equipment lists.

If you keep mileage reasonable and maintain the vehicle well, you should be in a better position to protect value when it is time to sell. The model’s premium badge and strong owner satisfaction help support demand, even if the market is still pricing it below last year’s level.

Vehicles with solid owner satisfaction ratings, like this model year's 4.14/5, tend to retain buyer demand, which supports resale value over time.

Is the 2020 Mercedes-Benz GLB safe?

The 2020 Mercedes-Benz GLB earns a 10/10 safety score from our experts.

Standard safety equipment includes a driver monitoring system, backup camera, forward collision warning with pedestrian detection, automatic emergency braking, and Pre-Safe front collision preparation. The optional Driver Assistance Package adds adaptive cruise control, lane-centering assistance, evasive steering assistance, automatic emergency stop assistance, and additional Pre-Safe enhancements.

One caveat is that many of the most advanced driver-assistance features are optional rather than standard, so you should confirm whether a used example has the package you want. If safety tech matters to you, that package is worth prioritizing.

Should I buy a 2020 Mercedes-Benz GLB 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:

• 34.3% of listings are priced as good or great deals.
• Accident-free inventory is solid at 81.3% — always verify the vehicle history report.
• Price trend: Prices have softened 11.00% compared with last year.
• Owners rate it 4.14/5 — a solid satisfaction signal.
• It stands out for impressive technology, strong practicality, and a fun-to-drive personality.

Consider the 2021 if:

• At $23,086, the 2021 costs more than the current year's $20,503 average.
• It adds an optional third row of seating for up to seven passengers.

The bottom line: If you want the better value, the 2020 is the smarter buy because it delivers the GLB’s core strengths at a lower average price. If you need extra passenger flexibility and can spend more, the 2021 is the better fit.

These recommendations are based on CarGurus' proprietary market data from September 22, 2026, CarGurus experts' opinions, and generative AI.