2021 Mercedes-Benz GLB

2021 is the second model year of the first-generation X247 GLB, introduced for 2020, and carries over unchanged ahead of the 2024 facelift. The volume GLB 250 uses the conventional M260 2.0L turbo I4 at 221 hp, and the AMG GLB 35 tops the range at 302 hp.

The 2.0L turbo makes 258 lb-ft from 1,800 rpm, which is competitive for the subcompact luxury class.

Mercedes quotes 6.9 s from 0–60 for the GLB 250, mid-pack for the class. Instrumented tests have run about 6.0 s, and the AMG GLB 35 is quoted at 5.1 s.

The turbo four is quiet at a cruise and has a broad torque plateau. Without the 48V starter-generator that arrived for 2024, stop-start restarts are noticeable, and reviewers found the engine coarse when worked hard and slightly laggy off the line.

The 8-speed dual-clutch shifts quickly at speed but is jerky and hesitant in low-speed stop-and-go traffic, a recurring complaint about Mercedes' MFA2 models.

A hitch-equipped GLB 250 4MATIC is commonly rated at 3,500 lbs braked, which is strong for the class. Mercedes-Benz USA does not prominently publish the US tow rating, and 2021-specific listings leave it blank.

4MATIC AWD is optional on the GLB 250 (FWD is the base) and standard on the AMG GLB 35. It works well in bad weather but has no low range or advanced terrain hardware.

A road-focused crossover with about 7.9 in of maximum ground clearance and modest approach/departure angles. The optional Off-Road Engineering package on 4MATIC models adds an off-road drive mode and downhill speed regulation, but there are no lockers and no off-road trim.

For 2021 the US GLB offers only two tunes of the same 2.0L turbo (GLB 250 at 221 hp, AMG GLB 35 at 302 hp). There is no hybrid, and the electric EQB did not reach the US until 2022.

The volume GLB 250 4MATIC (2.0L turbo, 8-speed DCT, no mild hybrid) is EPA-rated at 26 MPG combined for 2021, 1 MPG better than the 2022 rating. The FWD version also rates 26.

This is the EPA city rating for the 4MATIC volume trim; for 2021 FWD and AWD rate the same in the city.

This is the EPA highway rating for the 2021 4MATIC volume trim, 1 MPG below FWD.

Calculated from the EPA combined rating and the 15.9-gallon (60 L) US tank.

This is EPA's annual fuel-cost estimate for the volume 4MATIC trim at standard assumptions (15k mi/yr), raised by the premium fuel requirement. EPA reprices this figure as fuel prices change.

Every 2021 GLB, from the GLB 250 to the AMG GLB 35, requires premium unleaded, which makes it more expensive to fuel than rivals that accept regular.

NHTSA rated the 2021 GLB 4MATIC 5 stars overall with a 4-star frontal (driver 5, passenger 4), 5-star side and side pole, and 4-star rollover; the FWD GLB 250 earns 4 stars overall on its higher rollover risk.

IIHS has never crash-tested the first-generation GLB, so the 2021 model has no award and no small-overlap, moderate-overlap or side results; it sits at the top of the untested band because the shared MFA2 structure earned 5 stars from Euro NCAP and NHTSA rates the 4MATIC 5 stars overall.

The 2021 GLB 250 comes standard with Active Brake Assist (AEB with pedestrian/cyclist detection), Blind Spot Assist and Attention Assist. Adaptive cruise, lane keeping/centering and active blind-spot braking all sit in the optional Driver Assistance Package, and NHTSA lists lane departure warning as not standard. That is thinner than the standard suites on the BMW X1 and Volvo XC40.

IIHS has not evaluated the GLB's front crash prevention. Active Brake Assist covers vehicles, pedestrians and cyclists and did well in Euro NCAP AEB testing on the shared platform, but with no US day/night pedestrian result it cannot reach the top band.

Blind Spot Assist with vehicle exit warning is standard but only alerts the driver. Active Blind Spot Assist, which brakes to intervene, and the rear cross-traffic functions require the optional Driver Assistance or parking packages.

When optioned, Active Steering Assist and Active Lane Keeping Assist provide smooth, well-regarded lane centering. A volume GLB 250 without the Driver Assistance Package has no lane departure warning at all, according to NHTSA's 2021 listing.

Active Distance Assist DISTRONIC is a refined full-speed stop-and-go system that works with Active Steering Assist and adapts speed to the route. It stays out of the top band because it is optional on the volume trim.

The 2021 GLB has no hands-free driving option. The Driver Assistance Package is a hands-on Level 2 system, and Mercedes' DRIVE PILOT later came only to the S-Class and EQS.

The pre-facelift 2021 GLB has standard LED headlights, with Adaptive Highbeam Assist and Multibeam LED optional. IIHS has never rated the GLB's headlights, so how well they actually perform is unverified.

The GLB's boxy, upright greenhouse, tall side glass and near-vertical tailgate give clearly better sightlines than the sloping GLA. A rearview camera is standard and a 360-degree camera is optional.

The wheelbase is 3.9 in longer than the GLA's, and with a sliding second row and tall, square rear doors, rear-facing seats fit more easily than in most subcompact luxury rivals. Three-across is tight, and IIHS has not rated the GLB's LATCH hardware.

The volume 2021 GLB 250 seats five. An optional two-place third row makes the GLB the only 7-seat choice in the subcompact luxury class. 2021 is the second model year of the first-generation X247 and a carry-over year for the body.

The tall, boxy X247 body gives generous front headroom.

Front legroom is adequate but on the short side for an SUV.

The upright roof is carried well rearward, giving second-row headroom that beats most subcompact luxury rivals. The body shell is unchanged from MY2020 to MY2025.

A wheelbase 10 cm longer than the GLA's and a sliding second row give roomy rear legroom for the class.

The optional third row suits only a couple of small passengers on short trips. About 29 in of legroom and roughly 5 cu ft of cargo space behind it make it token seating for adults, though no class rival offers one at all.

The 5-seat GLB has 22 cu ft behind the second row in a usefully square hold, mid-pack for the class.

62.0 cu ft with the seats folded is among the largest in the subcompact luxury class, ahead of the BMW X1.

A sliding, reclining 40/20/40 second row and a flat-loading cargo hold make it versatile. The pre-facelift console carries the MBUX touchpad, which eats space, and door and bin storage is ordinary. The 115V outlet that 2022 added to the Premium Package was not offered for 2021.

The front and second-row seats are supportive on longer drives, though some find them tight. The third row is cramped. Heated seats are packaged on most US cars.

The highway ride is smooth and composed, but sharp impacts come through on the larger optional wheels, and adaptive damping is optional.

It is quiet at a steady cruise, but the upright body brings more wind noise than expected for a luxury vehicle, and the 2.0T is coarse when worked. With no 48V starter-generator, stop-start restarts are noticeable.

Dual-zone climate and rear vents are standard. Heated front seats and a heated steering wheel are extra-cost options on the US 2021 GLB 250, and ventilated seats are not offered on the volume trim.

The cheapest 2021 GLB is the front-drive GLB 250 at $38,050 before destination, or $39,100 with the $1,050 destination charge. 2021 was the generation's second model year and carried over unchanged.

Most GLBs sold are the GLB 250 4MATIC: $40,050 plus $1,050 destination, or $41,100. A typical dealer build adds the roughly $2,000 Premium package, which puts it near $43,100. The AMG GLB 35 starts at $50,550 delivered.

The 2021 GLB has the same M260 2.0T, 8-speed dual-clutch and A/B service schedule as the other pre-facelift (2020–2023) cars. At Mercedes dealer labor rates, 5-year maintenance plus repairs comes to about $8,000. Estimates vary widely by source.

KBB's 2026 private-party value for a 2021 GLB 250 is about $20,900. Against the $39,100 delivered price that is roughly 53% retained after about five years, mid-pack for a luxury compact SUV.

Mercedes-Benz USA's new-vehicle limited warranty runs 4 years or 50,000 miles. That is typical for luxury brands and short of Genesis or Lincoln coverage.

Mercedes offers no extended powertrain term. The engine and transmission are covered only by the 4-year / 50,000-mile basic warranty, the bottom of the band.

Roadside assistance for the warranty period and a Mercedes me connect trial are included. No scheduled maintenance is free: services are paid one at a time or bought through Prepaid Maintenance. That is weaker than BMW Ultimate Care (3 yr/36k) and Volvo's included maintenance.

$43,100 volume-trim price minus its estimated resale value after 5 years (53% retained, or about $22,843) leaves about $20,257 in depreciation. Add the projected $8,000 in 5-year maintenance and repairs, and owning this vehicle for 5 years costs about $28,257 in total.

In 2021, the GLB's second model year, Consumer Reports predicted below-average reliability for it. Owner-complaint indexes are milder, but the launch-era recall load backs up the weak prediction. J.D. Power publishes no model-specific dependability score for this year.

Mercedes-Benz sits in the lower third of Consumer Reports' brand reliability rankings year after year. In J.D. Power's U.S. Vehicle Dependability Study it trails the premium leaders: Lexus, Porsche and Cadillac.

Twelve NHTSA campaigns cover the 2021 GLB, a heavy load for a single model year. Several are safety-relevant: corrosion of the front axle carrier (AMG GLB 35), a damaged ESP unit that can disable ABS/ESC and short-circuit, and incorrectly fitted window and driver airbags. Most of the rest are small-batch assembly errors or fleet-wide MBUX/eCall software fixes, and none involves the engine or transmission.

The volume GLB 250 4MATIC uses the M260 2.0L turbo four with the 8G-DCT dual-clutch, an MFA2 combination with no widespread failures on record. The 2021 car predates the 48V mild hybrid. The DCT draws complaints about low-speed behavior, and as of 2021 the combination had only a short track record, which keeps it in the mid band.

The pre-facelift cabin has the twin-screen widescreen cockpit and turbine vents, and it reads clearly above mainstream compacts. Reviewers note hard plastics low in the cabin and less polish than the GLC, so it is competitive rather than class-leading.

Several 2021-specific recalls stem from assembly errors at the COMPAS plant in Aguascalientes, Mexico: a mis-installed level-sensor linkage, a mis-mounted window airbag, wrong driver airbag modules, and loose wheel-arch covers and tailgate spoilers. Each batch was small, but together they point to inconsistent early-production quality, pulling this below the later-year GLBs.

Mercedes-Benz has a dense US network of roughly 380+ dealers, with strong metro coverage and luxury amenities such as loaners. Its service satisfaction is respectable but trails Lexus and Cadillac.

Parts are readily available through dealers, and the MFA2 platform shares components with the A-Class, CLA and GLA. Mercedes OEM parts and labor rates are still among the highest in the segment.

The 2021 GLB 250 comes standard with a pair of 7-in MBUX displays, and the touchscreen and navigation became standard for 2021. The 10.25-in widescreen pair needs the Premium Package and is standard only on the new AMG GLB 35.

First-generation MBUX is quick with sharp graphics and offers touchscreen, console touchpad, steering-wheel touch controls, voice, and physical climate controls. The many overlapping inputs and capacitive wheel pads make it fussy, and the standard 7-in screen feels small.

Apple CarPlay and Android Auto are standard but wired on the 2021 GLB; wireless projection arrived with the MY2024 facelift.

The natural-language 'Hey Mercedes' assistant is standard and capable, and built-in navigation became standard on the GLB 250 for 2021. Augmented-reality guidance remains optional.

The standard audio is adequate, and the optional 12-speaker, 590-watt Burmester system is a strong upgrade. Sources conflict on whether satellite radio is standard for 2021.

A configurable 7-in digital driver display is standard, with the full 10.25-in widescreen pair optional. The cluster is fully digital on every trim but small in base form.

MBUX receives over-the-air infotainment and map updates. Whole-vehicle software updates arrived only with the MB.OS-based second-generation GLB.

The Mercedes me app covers remote lock and unlock, remote start, a vehicle locator and status. Some services become paid subscriptions after the trial, and there is no phone-as-key.

USB-C ports serve both rows and wireless charging is optional. The 115V outlet was added to the Premium Package only for 2022, so the 2021 car has none.

A power liftgate and app-based remote start are standard. Sources disagree on whether KEYLESS-GO entry is standard for 2021; US dealer cars mostly carry it through a package, and it became standard across the line in 2024.

A rear camera is standard. The 360-degree surround-view camera and Active Parking Assist come only in the optional Parking Assistance package.

A head-up display is available on the X247 GLB only as a high-level option and is not standard on the volume GLB 250.

Tall, square rear doors, a sliding and reclining second row, and 39.3 in of rear headroom with 38.1 in of legroom make car seats easy for the class. The optional third row adds kid seating no rival offers.

NHTSA rates the 2021 GLB 4MATIC 5 stars overall (FWD 4 stars). AEB is standard, and Blind Spot Assist with exit warning became standard for 2021. IIHS never tested it, and adaptive cruise, lane keeping and lane departure warning are optional.

Four adults ride comfortably, with good rear space, rear vents and a smooth highway ride. With the third row in use only about 5 cu ft of luggage space remains, and heated seats cost extra.

High seating and good visibility make it easy to live with. The 8-speed dual-clutch is jerky in traffic, and stop-start restarts are noticeable without a 48V system.

It returns about 25 MPG combined (4MATIC) on premium fuel, with luxury-brand running costs. That is typical of the class, not cheap per mile.

A 182-in footprint, an upright greenhouse and a standard rear camera make it easy to place. The 38.4-ft turning circle is average, and the 360 camera sits in a package.

A hitch-equipped 4MATIC is commonly rated to 3,500 lb, and the boxy 62 cu ft hold swallows bulky items. It is still a luxury crossover with modest payload.

The luxury-trimmed cabin and dual-clutch transmission are not suited to hard use, and it has no fleet or work reputation.

Cargo tie-downs, available roof rails and an optional hitch are the extent of it. There is no 115V outlet for 2021 (it was added for 2022), no washable flooring and no upfit ecosystem.

Highway cruising is relaxed thanks to a composed ride, supportive seats and about 30 MPG highway. Wind noise and an optional rather than standard DISTRONIC keep it out of the top band.

Optional 4MATIC, about 7.9 in of ground clearance, an available Off-Road Engineering package and a 3,500-lb hitch handle gravel roads and small trailers. It is not a trail vehicle.

A square hold, a sliding 40/20/40 second row, 62 cu ft maximum, roof rails and an available hitch beat most class rivals, though space behind the second row is modest.

Competent, secure and predictable, but the tall body is not as athletic as the BMW X1. The AMG GLB 35, new for 2021, is far sharper.

The steering is accurate and nicely weighted but numb, with less feedback than more agile rivals.

Braking is predictable, with a firm, progressive pedal in everyday use. No 2021 instrumented stopping distance was retrieved, so it is held at a class-typical level.

The 2.0T has a broad torque plateau from 1,800 rpm, but the dual-clutch is slow off the line and jerky in traffic, and stop-start restarts are rougher without the 48V system that arrived for 2024.

The engine is quiet at a cruise but coarse and buzzy when worked hard. It is audible without being intrusive in normal driving.

The 38.4-ft turning circle is about average for a compact crossover with this wheelbase.

An upright driving position, 40.7 in of front headroom and big glass give excellent sightlines, and physical climate controls remain. Overlapping MBUX inputs, capacitive wheel pads and 41.1 in of front legroom cost a few points.

The GLB 250 is pleasant and practicality-first but forgettable to drive, and the jerky DCT dulls it further. Enthusiasts are pointed to the AMG GLB 35 or the BMW X1.

The 2021 GLB 250 comes standard with MBUX on dual 7-inch screens, LED headlights, automatic emergency braking, a power liftgate and wired CarPlay/Android Auto. Heated seats, keyless entry, blind-spot assist, adaptive cruise, the 10.25-inch screens and the third row all cost extra in packages.

At $39,100–$41,100 delivered, the 2021 GLB undercut the X1 and Q3 while offering a 221-hp 2.0T, the roomiest cabin in the class and the only optional third row. Thin standard equipment pushes a typical packaged car to about $43K, so this is good value rather than a standout bargain.

The lineup is GLB 250 FWD, GLB 250 4MATIC and AMG GLB 35 4MATIC, spanning about $39.1K–$50.6K delivered. The optional third-row bench makes it the class's only seven-seater, and the package menu is broad. No hybrid or EV variant was offered in 2021.

2021 was the GLB's best US sales year at about 26,700 units, up on its 2020 launch year. That made it a strong seller in the subcompact luxury class, though still behind the BMW X1.

The three-pointed star is one of the strongest luxury badges in the US and a major draw for first-time luxury buyers stepping into a GLB.

Early in the 2021 model year, buyers could get modest discounts and subvented Mercedes-Benz Financial lease and APR offers. From mid-2021 the chip shortage thinned luxury inventory and discounting largely ended.

2021 was the second model year of the X247 generation, launched for 2020 on the current MFA2 platform with MBUX. The car was fresh, and its facelift was still three years off (MY2024).

Reviewers praised the GLB's boxy, practical packaging, its rare optional third row and its MBUX tech. They criticized the firm ride, the thin standard equipment and the cramped third row. It is well reviewed but rarely the pick in comparison tests, where the BMW X1 and Volvo XC40 usually win.