Used 2021 Mercedes-Benz GLA for Sale nearSaint Louis, MO

How much does the 2021 Mercedes-Benz GLA cost?

Prices have softened 12.78% compared to this time last year, making it a favorable time to shop this model year.

There are 644 listings available, which suggests you should have a workable selection to compare.

Is the 2021 Mercedes-Benz GLA a good car?

Generally — the 2021 Mercedes-Benz GLA earns a 4.3/5 user rating and a 7.5/10 expert rating. The standout strength is Technology at 9/10.

It fits the role of a compact luxury SUV well: it is cute, compact but not cramped, and easy to maneuver, while the redesign gives it a more conventional SUV shape. The trade-offs are clear, though: poor ride quality and poor handling hold it back, and cargo space is limited.

For shoppers who want a small luxury SUV with strong tech and multiple powertrain options, it makes sense to keep on the list. The market also shows 35.1% of listings as good or great deals, which gives you some room to shop carefully.

Is the 2021 Mercedes-Benz GLA reliable?

Owners rate it 4.3/5, a solid signal of long-term satisfaction.

The GLA’s redesign and compact-SUV packaging point to a model that is meant to be easy to live with, and the expert notes emphasize that it delivers the basics buyers expect from the segment. Its turbocharged powertrain is described as unrefined in daily driving, but it performs better once you are up to speed.

The ownership picture is helped by the fact that Mercedes includes a car-wash function and a broad set of standard convenience features, which can make day-to-day use easier. For used buyers, the main long-term risk is that the car’s premium badge does not automatically translate into premium refinement, so condition and maintenance history matter a lot.

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

Accident-free inventory is solid at 76.7% — always verify the vehicle history report.

You should still run a history report on any candidate and prioritize a pre-purchase inspection, especially if you are considering a higher-mileage example or one with optional equipment. Focus on overall condition, because the GLA’s value proposition depends heavily on whether the car has been kept clean, maintained, and free of abuse.

Key things to evaluate:

• Trim level: The GLA’s entry-level positioning shows up in its interior, where the tester had less-than-premium surfaces and some easily scratched materials. Standard LED headlights are included, while adaptive LED headlights are available as part of a package.
• Powertrain: The GLA 250 and GLA 250 4MATIC use a 2.0-liter turbocharged four-cylinder with 221 horsepower and 258 pound-feet of torque, paired with an eight-speed dual-clutch transmission. The AWD system can shift torque distribution depending on drive mode, and fuel economy is listed at 25 mpg city, 34 mpg highway, and 28 mpg combined for the front-wheel-drive version.
• Safety package: Every GLA includes a rearview camera, blind-spot monitoring, forward-collision warning, vehicle-exit warning, automatic emergency braking, driver-drowsiness monitoring, crosswind assist, and traditional cruise control. The Driver Assistance Package adds adaptive cruise control, active lane-keeping assist, active blind-spot assist, evasive steering assist, route-based speed adjustment, traffic-jam assist, and other advanced features, while the Parking Assistance Package adds a surround-view camera and parking assist.
• Infotainment: Standard MBUX includes two 7.0-inch display screens, Bluetooth, Apple CarPlay, Android Auto, four USB ports, and touch and touchpad control. Available upgrades include a 10.25-inch touchscreen, wireless device charging, a WiFi hot spot, navigation, head-up display, and a 12-speaker Burmester audio system.
• Fuel efficiency: The front-wheel-drive GLA 250 is rated at 25 mpg city, 34 mpg highway, and 28 mpg combined, while the 4MATIC version does one mpg worse in each category.

Which 2021 Mercedes-Benz GLA trim should I buy?

The 2021 Mercedes-Benz GLA is offered in 3 trim levels: GLA 250, GLA 250 4MATIC, AMG GLA 35.

Here's the short version:

• GLA 250: This is the best-value starting point if you want the core GLA experience without paying for AWD or AMG performance. You still get the 221-horsepower turbo-four, the standard MBUX system, and the full set of basic safety features.
• GLA 250 4MATIC: Choose this if you want all-wheel drive and the added traction that comes with it. It keeps the same engine and tech as the GLA 250, but the added capability comes with a higher starting price and slightly lower fuel economy.
• AMG GLA 35: This is the performance choice, with 302 horsepower, AMG-specific drive modes, sport suspension, high-performance brakes, and an AMG exhaust system. It is the right pick if you want the quickest and most aggressive version of the lineup.

For safety equipment, the Driver Assistance Package is the key upgrade if you want nearly all of the most desirable active safety technology.

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

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

• Deal availability: 35.1% of listings are priced as good or great deals.
• Inventory: There are 644 listings available.
• Price trend: Prices have softened 12.78% compared with last year.
• Clean inventory: 76.7% of listings are accident-free.

If you find a listing below $22,106, that's toward the low end of the year-round range and worth acting on quickly.

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

The current average of $22,106 sits slightly below last year's $25,345.

That decline suggests the market has already adjusted downward, which can be good news if you are buying now but less favorable if you are planning to sell soon. For a future seller, the key takeaway is that the GLA’s value is being shaped by softer pricing and a competitive small-luxury-SUV segment.

If you keep the car in strong condition and maintain it well, you should be in a better position to protect value. Vehicles with solid owner satisfaction ratings, like this model year's 4.3/5, tend to retain buyer demand, which supports resale value over time.

Is the 2021 Mercedes-Benz GLA safe?

The 2021 Mercedes-Benz GLA earns a 7/10 safety score from our experts.

Mercedes gives every GLA a reasonable amount of active safety features, including a rearview camera, blind-spot monitoring, forward-collision warning, vehicle-exit warning, automatic emergency braking, driver-drowsiness monitoring, crosswind assist, and traditional cruise control.

If you want the most desirable advanced safety tech, you need the Driver Assistance Package. It adds adaptive cruise control, active lane-keeping assist, active blind-spot assist, evasive steering assist, route-based speed adjustment, traffic-jam assist, active lane change assist, and more. The Parking Assistance Package adds a surround-view camera and parking assist.

Without the Driver Assistance Package, the standard safety list feels modest for the price, so that package is worth prioritizing if safety tech matters to you.

Should I buy a 2021 Mercedes-Benz GLA 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:

• 35.1% of listings are priced as good or great deals.
• Accident-free inventory is solid at 76.7% — always verify the vehicle history report.
• Price trend: Prices have softened 12.78% compared with last year.
• Owners rate it 4.3/5 — a solid satisfaction signal.
• The 2021 model year brought a complete redesign that made the GLA more SUV-like, more compact-SUV friendly, and better aligned with what buyers expect from the segment.

The bottom line: If you want the redesigned GLA with strong tech, compact dimensions, and a lower used price than last year, the 2021 is the one to target. If you are especially price-sensitive, you may want to compare it against other similarly sized luxury SUVs before deciding, since the GLA’s ride quality, handling, and cargo space are not its strongest points.

How does the 2021 Mercedes-Benz GLA compare to the 2021 BMW X1?

These recommendations are based on CarGurus' proprietary market data from November 10, 2026, CarGurus experts' opinions, and generative AI.