2026 GMC Acadia vs 2026 Mercedes-Benz GLB

$43,700 · Crossover

$43,800 · Crossover

Comparison Overview

The 2026 GMC Acadia and Mercedes-Benz GLB present distinct trade-offs, starting with the most significant numerical divergence: the GLB achieves 28 combined MPG while the Acadia nets only 23 combined MPG, a 5 MPG advantage for the Mercedes. Conversely, the Acadia dominates in raw output, boasting 328 hp and 326 lb-ft of torque compared to the GLB's 221 hp and 258 lb-ft. This power discrepancy suggests vastly different driving dynamics. Dimensionally, the Acadia is substantially larger, measuring 204.0 inches long versus the GLB's 182.4 inches, translating to a negligible 1 cubic foot difference in cargo capacity (23 cu ft vs. 22 cu ft). Priced nearly identically at $43,700 (Acadia) and $43,800 (GLB), the primary decision revolves around prioritizing efficiency and compact maneuverability or prioritizing substantial power and exterior size.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Mercedes-Benz GLB

The Mercedes-Benz GLB wins for daily commuting due to its superior 28 combined MPG rating, which lowers routine operational costs.

👨‍👩‍👧‍👦 Best for Families

2026 GMC Acadia

The larger 2026 GMC Acadia, with its 204.0-inch length, offers more presumed passenger volume and easier access than the compact GLB.

🏎️ Best for Enthusiasts

2026 GMC Acadia

The 2026 GMC Acadia delivers 107 more horsepower (328 hp vs. 221 hp) and greater torque (326 lb-ft vs. 258 lb-ft), catering to performance seekers.

💰 Best Value

2026 Mercedes-Benz GLB

Although similarly priced, the GLB's premium fuel requirement is offset by its 5 MPG advantage, leading to lower overall running costs.

Choose the GMC Acadia if...

You require the higher output of 328 horsepower for towing or merging power.
You need the maximum overall footprint, evidenced by the 204.0-inch overall length.
You prefer using regular unleaded fuel instead of premium unleaded gasoline.

Choose the Mercedes-Benz GLB if...

Maximizing fuel efficiency is critical, delivering 28 combined MPG.
A smaller vehicle profile is necessary, as the GLB is significantly shorter at 182.4 inches.
You accept the slightly lower power output (221 hp) in exchange for better mileage.

Key Dimensions

Dimension	GMC Acadia	Mercedes-Benz GLB
Length	204.0"	182.4"
Width	79.6"	72.2"
Height	71.0"	66.7"
Wheelbase	120.9"	111.4"

Features Comparison

Safety

Feature	GMC	Mercedes-Benz
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	—
Lane Keeping Assist System	✓	—
Rear Cross Traffic Alert	✓	—
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Third Row Head Airbags	✓	—
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Rear Door Child Safety Locks	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Front Ventilated Disc Brakes	✓	✓
Rear Ventilated Disc Brakes	✓	—
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	2	3
Rear Fixed Headrests	✓	—
Rear Center 3-Point Seatbelt	✓	✓
Engine Immobilizer	✓	✓
Driver Attention Alert	—	✓
Brake Drying	—	✓
Rear Solid Disc Brakes	—	✓
Brake Preparation System	—	✓
Front Fog Lights	—	✓
Rear Height Adjustable Headrests	—	✓
Anti-Theft Alarm System (Remote)	—	✓

Engine

Feature	GMC	Mercedes-Benz
Base Engine Displacement	2.5 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	gas	mild hybrid
Horsepower	328 hp @ 5500 rpm	221 hp @ 5500 rpm
Torque	326 lb-ft @ 3500 rpm	258 lb-ft @ 1800 rpm
Number of Valves	16	16
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	GMC	Mercedes-Benz
Transmission Type	8-speed shiftable automatic	8-speed automated manual
Drivetrain Type	front wheel drive	front wheel drive

Fuel

Feature	GMC	Mercedes-Benz
Fuel Type	regular unleaded	premium unleaded (required)
EPA Fuel Economy (City/Highway)	20/27 MPG	25/33 MPG
EPA Fuel Economy (Combined)	23 MPG	28 MPG
EPA Driving Range (City/Highway)	0/0 mi.	397.5/524.7 mi.
Fuel Tank Capacity	—	15.9 gal.

Comfort & Convenience

Feature	GMC	Mercedes-Benz
Push Button Start	✓	✓
Tilt and Telescopic Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Cruise Control on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Front View Camera	✓	—
Side View Camera	✓	—
Rear View Camera	✓	✓
Rear Parking Sensors	✓	✓
Wireless Charging Pad	✓	—
Adaptive Cruise Control	✓	—
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
3rd Row Cupholders	✓	—
Front Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Heated Steering Wheel	✓	—
Three Zone Climate Control	✓	—
Rear Ventilation Ducts	✓	✓
Sun Sensor	✓	—
Dual Vanity Mirrors	✓	✓
Digital Rearview Mirror	✓	—
Turn Signal Indicators in Mirrors	✓	✓
Transmission Controls on Steering Wheel	—	✓
Front Parking Sensors	—	✓
Driver Assisted Parking Assist	—	✓
Cruise Control	—	✓
Rear Door Pockets	—	✓
Overhead Console with Storage	—	✓
Leather Steering Wheel	—	✓
Dual Zone Climate Control	—	✓
Interior Air Filtration	—	✓
Auto-Dimming Rearview Mirror	—	✓

In Car Entertainment

Feature	GMC	Mercedes-Benz
Infotainment Display	15.0 in	10.25 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	Bose	—
Speaker System	12	—
Subwoofer Count	1	—
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
Auxiliary Audio Input	✓	—
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	3 months	6 months
Speed Sensitive Volume Control	✓	—

Power Feature

Feature	GMC	Mercedes-Benz
One-Touch Power Windows	4	4
Keyless Entry	✓	—
Heated Mirrors	✓	✓
Remote Keyless Entry	—	✓

Frontseats

Feature	GMC	Mercedes-Benz
Front Head Room	42.6 in.	40.7 in.
Front Leg Room	44.3 in.	41.1 in.
Front Shoulder Room	62.0 in.	55.9 in.
Front Hip Room	59.2 in.	—
Seat Material: Cloth	✓	—
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	8-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Passenger Seat Manual Adjustments	4-way	—
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Seat Material: Leatherette	—	✓
Driver Seat Thigh Extension	—	✓
Driver Seat Memory Settings	—	3
Passenger Seat Power Adjustments	—	8-way
Passenger Seat Height Adjustment	—	✓
Passenger Seat Lumbar Support	—	Power
Passenger Seat Thigh Extension	—	✓
Passenger Seat Memory Settings	—	3

Rearseats

Feature	GMC	Mercedes-Benz
Rear Head Room	40.0 in.	39.3 in.
Rear Leg Room	41.5 in.	38.1 in.
Rear Shoulder Room	62.0 in.	54.9 in.
Rear Hip Room	58.4 in.	—
Split-Folding Rear Seatback	✓	✓
Reclining Rear Seats	✓	✓
Folding Center Armrest	✓	✓
Manual Folding Third Row Seat	✓	—

Tires and Wheels

Feature	GMC	Mercedes-Benz
Wheel Finish	Painted Alloy	—
Wheel Size	18 x 7.5 in	18 x 7.5 in
Tire Type	All Season	—
Tire Size	255/65R18	235/55R18
Spare Tire Type	Temporary	—
Spare Tire Location	Underbody Mounted	—
Wheel Material	—	Alloy
Run Flat Tires	—	✓

Suspension

Feature	GMC	Mercedes-Benz
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	✓	✓
Rear Stabilizer Bar	✓	✓

Warranty

Feature	GMC	Mercedes-Benz
Basic Warranty	3 yr./ 36000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	5 yr./ 60000 mi.	4 yr./ 50000 mi.
Corrosion/Rust Warranty	6 yr./ 100000 mi.	4 yr./ 50000 mi.
Roadside Assistance	5 yr./ 60000 mi.	4 yr./ 50000 mi.
Complimentary Scheduled Maintenance	1 yr./ unlimited mi.	—
Hybrid Component Warranty	—	6 yr./ 62000 mi.

Frequently Asked Questions

Common questions about comparing the 2026 GMC Acadia and 2026 Mercedes-Benz GLB.

Which vehicle has a lower operational cost based on fuel?

The Mercedes-Benz GLB is projected to have lower fuel costs, achieving 28 combined MPG compared to the GMC Acadia's 23 combined MPG. However, the GLB requires premium unleaded fuel, which may offset some of those savings depending on local pricing differences versus the Acadia's regular unleaded requirement.

How significant is the size difference between the two crossovers?

The difference in exterior dimensions is substantial; the Acadia measures 204.0 inches long, making it 21.6 inches longer than the GLB's 182.4-inch length. Despite this, their listed cargo capacities are nearly identical, with the Acadia at 23 cu ft and the GLB at 22 cu ft.

Is the power difference between the two vehicles noticeable?

Yes, the power gap is substantial, with the Acadia producing 328 hp and 326 lb-ft of torque, whereas the GLB offers 221 hp and 258 lb-ft of torque. This 107 hp difference means the Acadia offers significantly more acceleration potential.

Do either of these models offer all-wheel drive?

Based on the provided specifications, both the 2026 GMC Acadia and the 2026 Mercedes-Benz GLB are listed with a front-wheel drive orientation. Buyers seeking AWD must verify optional configurations beyond these base FWD numbers.

What is the cost of entry for these two models?

The initial purchase prices are extremely close: the 2026 GMC Acadia starts at $43,700, while the 2026 Mercedes-Benz GLB begins at $43,800. This means the decision rests entirely on specification preference rather than MSRP.

How do the transmissions differ in operation?

The Acadia utilizes an 8-speed shiftable automatic transmission, known for smooth, predictable gear changes. In contrast, the GLB features an 8-speed automated manual transmission, which might offer a slightly different feel during gear engagement.