Used 2021 Mercedes-Benz GLB for SaleNationwide

How much does the 2021 Mercedes-Benz GLB cost?

Prices have softened 12.81% compared to this time last year, making it a favourable time to shop this model year.

There are 96 listings available, which gives you a reasonable amount of inventory to compare before you buy.

Is the 2021 Mercedes-Benz GLB a good car?

Yes — it earns a 5/5 user rating and an 8/10 expert rating. The standout strength is Cost effectiveness at 9/10.

The 2021 Mercedes-Benz GLB stands out for its unusual flexibility, especially its optional third row that expands seating to seven. It also brings an approachable starting price and an upscale, capable crossover feel, so you get family-friendly versatility without giving up the Mercedes-Benz look and feel.

35.4% of listings are priced as good or great deals, which suggests there are still worthwhile opportunities in the market.

Is the 2021 Mercedes-Benz GLB reliable?

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

The GLB is presented as a well-rounded premium SUV with Mercedes-Benz safety technology and a capable, predictable powertrain. Its turbocharged 2.0-litre inline-4 and eight-speed dual-clutch automatic are described as a decent performer, with power delivered in a linear, predictable fashion that suits family use. Mercedes-Benz also includes standard safety systems such as active brake assist, adaptive braking technology, crosswind assist, attention assist, and emergency call service.

If you choose your options carefully, ownership risk stays more manageable because you can avoid overloading the vehicle with expensive extras while still getting the core strengths that matter most.

What should I look for when buying a used 2021 Mercedes-Benz GLB?

Key things to evaluate:

• Trim level: The GLB is described as an attractive, taut SUV with an athletic stance and a modern cabin, but the base setup uses a 7-inch digital instrument cluster and a 7-inch touchscreen. Higher equipment levels add larger displays and more premium tech, so you should check whether the example you’re considering has the features you want.
• Powertrain: You get a turbocharged 2.0-litre inline-4 gasoline engine with 221 horsepower and 258 lb-ft of torque, paired with an eight-speed dual-clutch automatic transmission. In Canada, 4MATIC all-wheel drive is standard, and the power delivery is described as linear and predictable.
• Safety package: Standard equipment includes active brake assist, adaptive braking technology with hill-start assist and brake hold, crosswind assist, attention assist, and Mercedes-Benz emergency call service. Available upgrades include blind-spot monitoring, active distance assist Distronic adaptive cruise control, and the Advanced Driver Assistance Package with active steering assist, active lane change assist, active speed limit assist, active blind-spot assist, and active lane-keeping assist.
• Infotainment: Standard tech includes the Mercedes-Benz User Experience system, voice control, natural language understanding, keyword activation, Bluetooth, Apple CarPlay, Android Auto, a rearview camera, keyless start, cruise control, and a power liftgate. The Premium Package upsizes the digital instrument cluster and touchscreen to 10.25 inches each, while the Navigation Package adds navigation, augmented reality navigation, and traffic-sign assist.
• Fuel efficiency: Natural Resources Canada estimates fuel consumption at 11.1 litres per 100 kilometres in the city, 8.9 on the highway, and 10.1 combined.

Which 2021 Mercedes-Benz GLB trim should I buy?

The 2021 Mercedes-Benz GLB is offered in 1 trim level: GLB 250 4MATIC.

Here's the short version:

The GLB 250 4MATIC is the trim to focus on because it gives you the core GLB formula: the turbocharged 2.0-litre engine, standard 4MATIC all-wheel drive, and the flexible cabin layout that defines this model year. It also starts at an approachable price, which makes it the best-value path if you want the GLB’s practicality without chasing expensive options.

The safety package is strong even before options, and the available Advanced Driver Assistance Package adds a broad set of driver aids if you want more reassurance.

Is now a good time to buy a used 2021 Mercedes-Benz GLB?

This is a moderate market for selective buyers, so it makes sense to compare listings carefully and move quickly on strong examples.

• Deal availability: 35.4% of listings are priced as good or great deals.
• Inventory: There are 96 listings available.
• Price trend: Prices have softened 12.81% compared with last year.

If you find a listing below $30,501 CAD, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 Mercedes-Benz GLB's resale value?

The current average of $30,560 CAD sits slightly below last year's $35,050 CAD.

That decline suggests the GLB has become more accessible for used buyers, which can help support demand in the near term. For a future seller, it also means your resale outcome will depend heavily on condition, mileage, and equipment, since the market has already adjusted downward. Well-equipped examples with desirable safety and technology packages should be easier to position than stripped-down ones.

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

Is the 2021 Mercedes-Benz GLB safe?

The 2021 Mercedes-Benz GLB has not yet been rated for safety by the National Highway Traffic Safety Administration (NHTSA) nor the Insurance Institute for Highway Safety (IIHS).

It earns an 8/10 safety score from our experts.

Standard safety equipment includes active brake assist, adaptive braking technology with hill-start assist and brake hold, crosswind assist, attention assist, and Mercedes-Benz emergency call service. Available features include active LED headlamps, adaptive high-beam assist, blind-spot monitoring, and active distance assist Distronic adaptive cruise control. If you want the most comprehensive driver-assistance setup, the Advanced Driver Assistance Package adds route-based speed adaptation, active steering assist with emergency braking assist, active lane change assist, active brake assist with cross-traffic function, active speed limit assist, active blind-spot assist, and active lane-keeping assist.

Should I buy a 2021 Mercedes-Benz GLB or consider a different year?

If you're weighing the 2021 against nearby model years, here's how to think about it:

Choose the 2021 if:

• 35.4% of listings are priced as good or great deals.
• Price trend: Prices have softened 12.81% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.
• It stands out for its optional third row and approachable starting price.

Consider the 2022 if:

• At $34,001 CAD, the 2022 costs more than the current year's $30,560 CAD average.
• It focuses on maximising utility in a compact, boxy package.

The bottom line: If you want the better value today, the 2021 is the stronger buy because it combines a lower average price with flexible seating and solid equipment. If you’re willing to spend more for a newer model-year alternative, the 2022 is worth a look for its utility-first packaging.

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