Used 2020 Mercedes-Benz GLB for SaleNationwide

How much does the 2020 Mercedes-Benz GLB cost?

Prices have softened 11.86% compared to this time last year, making it a favorable time to shop this model year.

There are 505 listings available, which gives you 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 strong fuel-efficiency impression. The GLB’s use-case is clear: you’re getting a small luxury SUV that prioritizes everyday usefulness, a spacious cabin, and a premium feel over flash.

The trade-offs are just as clear: the ride can feel a bit rough, and some interior materials don’t always match the badge. Even so, 33.1% of listings are priced as good or great deals, which suggests there are still attractive opportunities in the market.

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. The expert evaluation also emphasizes the GLB’s thoughtful details and practical design, which supports the sense that it’s built to be easy to live with over time.

The ownership picture is helped by standard emergency call service that remains free for as long as you own the GLB. For used buyers, the main long-term risk is that desirable options can push the price up quickly, so condition and equipment matter a lot.

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

Accident-free inventory is solid at 79.4% — always verify the vehicle history report.

You should still check the report carefully, because a clean listing percentage doesn’t replace a proper history review. Prioritize a pre-purchase inspection that focuses on wear, electronics, and any signs that the vehicle has been optioned heavily. Since the GLB’s appeal depends so much on features and condition, make sure the specific example you’re considering matches the equipment you want.

Key things to evaluate:

• Trim level: The GLB 250 and GLB 250 4Matic are the two specification levels mentioned, and the base setup uses a standard 7-inch infotainment and instrumentation screen. The Premium Package upgrades those displays to twin 10.25-inch units and adds blind-spot warning and keyless entry and engine start.
• 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. Front-wheel drive is standard, while 4Matic AWD is available, and an Off-Road driving mode locks in a 50:50 power 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 enhanced Pre-Safe functions.
• Infotainment: The GLB uses MBUX with Android Auto and Apple CarPlay, plus natural voice recognition. The available Premium Package upgrades the screens to twin 10.25-inch displays, and the Multimedia Package adds navigation with augmented video.
• Fuel efficiency: The expert test loop returned 21.4 mpg, while the EPA estimate mentioned in testing 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: strong practicality, impressive technology, and the same turbocharged 2.0-liter engine as the AWD version. It makes the most sense if you want the lowest starting point and don’t need all-wheel drive.
• GLB 250 4Matic: This is the better choice if you want the added traction of 4Matic AWD and the more secure feel that comes with it. It’s the version to target if you expect to drive in worse weather or want the most complete all-around setup.

The safety package note to keep in mind is that the most advanced driver-assistance features live in the optional Driver Assistance Package, so check carefully for that equipment if it matters to you.

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

This looks like a moderate, selective buyer’s market, so you can shop with some leverage if you’re patient.

• Deal availability: 33.1% of listings are priced as good or great deals.
• Inventory: There are 505 listings available.
• Price trend: Prices have softened 11.86% compared with last year.
• Clean inventory: 79.4% of listings are accident-free.

If you find a listing below $20,364, 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 $20,364 sits slightly below last year's $23,105.

That decline suggests the GLB has already absorbed a meaningful amount of depreciation, which can help future sellers if they buy at the right price. If you purchase near the current average or below it, you may have a better chance of limiting your loss when it’s time to sell. The model’s premium badge and strong owner satisfaction can also help keep demand steady.

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?

It earns a 10/10 safety score from our experts.

Standard safety equipment includes a driver monitoring system, a backup camera, forward collision warning with pedestrian detection, automatic emergency braking, and Pre-Safe front collision preparation. Emergency call service is also standard, and it remains free for as long as you own the GLB.

The available Driver Assistance Package adds adaptive cruise control, lane-centering assistance, evasive steering assistance, and automatic emergency stop assistance, along with enhanced Pre-Safe functions. Second-row side-impact airbags and blind-spot monitoring with Exit Warning Assist are also available. The expert review notes that these advanced systems operate with accuracy and refinement, which is a strong sign for everyday confidence.

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:

• 33.1% of listings are priced as good or great deals.
• Accident-free inventory is solid at 79.4% — always verify the vehicle history report.
• Price trend: Prices have softened 11.86% compared with last year.
• Owners rate it 4.14/5 — a solid satisfaction signal.
• It delivers a practical, tech-forward small luxury SUV with strong utility and a premium feel.

Consider the 2021 if:

• At $22,951, the 2021 costs more than the current year's $20,364 average.
• It adds an optional third row for seven-passenger seating.

The bottom line: If you want the better value today, the 2020 is the smarter buy because pricing has softened and inventory is available. If you need the extra seating flexibility, the 2021 is the better path, but you’ll pay more for it.

These recommendations are based on CarGurus' proprietary market data from September 29, 2026, CarGurus experts' opinions, and generative AI.