Used 2020 Mercedes-Benz GLB for Sale nearHarrisburg, PA

How much does the 2020 Mercedes-Benz GLB cost?

Prices have softened 11.13% compared to this time last year, making it a favorable time to shop this model year.

There are 520 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 great design, premium features, and versatility, with many also noting its comfortable size and impressive technology. The GLB’s appeal is strongest if you want a premium small SUV that feels practical and thoughtfully packaged.

The trade-offs are worth weighing: the brakes are lacking, and the features many shoppers want can push the price up significantly. That matters most if you’re trying to keep the purchase close to the entry price rather than loading up on options.

The GLB fits buyers who want a small luxury SUV that prioritizes utility and functionality over pure style or performance, while still delivering a premium feel. Good and great deals account for 34.2% of listings, which suggests there are still attractive opportunities if you shop carefully.

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 reliable, versatile, and generally trouble-free in day-to-day use, with many drivers also appreciating its comfortable size and premium character. That kind of response usually suggests you can count on the GLB to deliver the ownership experience buyers expect from a compact luxury SUV.

The expert evaluation also supports that impression by describing the GLB as a vehicle with remarkable practicality and a driving character that feels well sorted for everyday use. On the ownership side, the cost-effectiveness commentary notes that Mercedes ownership can get expensive once you start adding desirable equipment.

For used buyers, the main long-term risk is that a well-optioned GLB can be more expensive to keep satisfying over time if you want the features that make it feel truly premium.

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

Accident-free inventory is solid at 82.5% — always verify the vehicle history report.

You should still check the history report carefully, because accident-free status doesn’t tell you everything about prior maintenance or cosmetic wear. A pre-purchase inspection is especially important on a luxury SUV like this, where optional equipment can affect both ownership experience and repair costs. Focus on overall condition, feature operation, and whether the vehicle has the equipment you actually want.

Key things to evaluate:

• Trim level: The GLB comes with standard roof rails and a practical, upright design, while higher-spec examples add AMG Line styling, larger wheels, ambient cabin lighting, and upgraded interior presentation. Base versions also miss some of the more desirable premium touches that make the cabin feel special.
• Powertrain: You get a turbocharged 2.0-liter four-cylinder with 221 horsepower and 258 lb-ft of torque, paired with an eight-speed dual-clutch automatic transmission. Front-wheel drive is standard, and 4Matic all-wheel drive is available if you want extra traction.
• Safety package: The available Driver Assistance Package adds adaptive cruise control, lane-centering assistance, evasive steering assistance, automatic emergency stop assistance, and enhanced Pre-Safe functions. Standard equipment already includes forward collision warning with pedestrian detection, automatic emergency braking, a backup camera, and a driver monitoring system.
• Infotainment: The standard setup uses a 7-inch infotainment and instrumentation display, while the Premium Package upgrades you to twin 10.25-inch screens under one glass panel. Apple CarPlay, Android Auto, and natural voice recognition are part of the MBUX system, and navigation with augmented video is available.
• Fuel efficiency: The expert test loop returned 21.4 mpg, and the EPA estimate cited in the review is 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 core GLB experience with the turbocharged 2.0-liter engine, MBUX infotainment, and the practical cabin layout that defines the model. It makes the most sense if you want the lowest starting price and plan to add only the options you truly care about.
• GLB 250 4Matic: This is the better all-around choice if you want all-wheel drive and the added traction that comes with it. It suits you best if you live in a place with rough weather or simply want the more secure-feeling setup.

The safety package note to keep in mind is that the most advanced driver-assistance features are bundled in the optional Driver Assistance Package, not standard on every trim.

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: 34.2% of listings are priced as good or great deals.
• Inventory: There are 520 listings available.
• Price trend: Prices have softened 11.13% compared with last year.
• Clean inventory: 82.5% of listings are accident-free.

If you find a listing below $20,790, 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 $20,791 sits slightly below last year's $23,395.

That decline suggests the GLB has already moved through a meaningful portion of its depreciation curve, which can help future resale stability if you buy at the right price. If you purchase near the current market average or below it, you give yourself a better chance of limiting your loss when it’s time to sell.

The model’s premium-badge appeal and strong owner satisfaction can help keep demand steady among used buyers. That matters because vehicles that feel desirable and well liked tend to hold attention longer in the market.

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 had not been crash tested by NHTSA or IIHS at the time of the review.

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 remains free for as long as you own the GLB.

If you want more advanced protection, the optional Driver Assistance Package adds adaptive cruise control, lane-centering assistance, evasive steering assistance, automatic emergency stop assistance, and additional Pre-Safe enhancements. Second-row side-impact airbags and blind-spot monitoring with Exit Warning Assist are also available.

One caveat is that many of the most useful safety upgrades are optional, so you’ll want to confirm exactly which systems are installed on any used example you’re considering.

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:

• 34.2% of listings are priced as good or great deals.
• Accident-free inventory is solid at 82.5% — always verify the vehicle history report.
• Price trend: Prices have softened 11.13% compared with last year.
• Owners rate it 4.14/5 — a solid satisfaction signal.
• It stands out for thoughtful details, impressive technology, and strong practicality.

Consider the 2021 if:

• At $23,333, the 2021 costs more than the current year's $20,791 average.
• It adds an optional third row for seven-passenger seating.

The 2020 is the better pick if you want the lower price and the core GLB formula of utility, technology, and premium feel. If you need extra seating flexibility and can spend more, the 2021 is the more versatile choice. For price-sensitive buyers, the 2020 remains the smarter value play.

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