2025 Mercedes-Benz GLB-Class vs 2026 Cadillac XT5

$45,800 · Crossover

$44,300 · Crossover

Comparison Overview

Choosing between the 2025 Mercedes-Benz GLB-Class and the 2026 Cadillac XT5 often comes down to prioritizing brand prestige versus sheer practicality. If running costs are top of mind, the GLB-Class pulls ahead significantly, boasting a 28 MPG combined fuel economy rating compared to the XT5’s 24 MPG combined. While both utilize premium fuel, the Mercedes might save you slightly more at the pump over a year. However, the Cadillac offers substantially more utility, presenting 30 cu ft of cargo capacity versus the GLB’s 22 cu ft, a major win for hauling gear. The Cadillac also wins on raw size, measuring 189.6 inches long compared to the GLB’s 182.4 inches. The Mercedes starts slightly higher at an MSRP of $45,800 versus the Cadillac’s $44,300, but the performance figures are close, with the XT5 offering 235 hp to the GLB's 221 hp.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 Mercedes-Benz GLB-Class

The GLB-Class wins for commuters due to its superior fuel efficiency, achieving 28 MPG combined versus the XT5's 24 MPG combined.

👨‍👩‍👧‍👦 Best for Families

2026 Cadillac XT5

The Cadillac XT5 is the better family choice because it offers a massive 30 cu ft of cargo capacity, significantly exceeding the GLB's 22 cu ft.

🏎️ Best for Enthusiasts

2026 Cadillac XT5

The XT5 appeals slightly more to enthusiasts by delivering 235 horsepower, beating the GLB-Class’s 221 horsepower rating.

💰 Best Value

2026 Cadillac XT5

The XT5 provides greater physical space and more horsepower for a lower starting MSRP of $44,300 compared to the GLB's $45,800.

Choose the Mercedes-Benz GLB-Class if...

You prioritize minimizing fuel stops, as the GLB-Class achieves a 4 MPG advantage in combined efficiency.
You prefer the slightly more compact exterior dimensions, measuring 182.4 inches in length for easier city parking.
You want the security of the brand's cachet even if the initial MSRP is $1,500 higher than the competitor.

Choose the Cadillac XT5 if...

Maximum utility is essential, thanks to its best-in-class 30 cu ft of cargo space.
You prefer a standard automatic transmission feel over the GLB's automated manual, as the XT5 uses a 9-speed shiftable automatic.
You are looking for higher base power output, as the XT5 makes 235 hp compared to the GLB's 221 hp.

Key Dimensions

Dimension	Mercedes-Benz GLB-Class	Cadillac XT5
Length	182.4"	189.6"
Width	72.2"	74.9"
Height	66.7"	66.1"
Wheelbase	111.4"	112.0"

Features Comparison

Safety

Feature	Mercedes-Benz	Cadillac
Blind Spot Monitor	✓	—
Driver Attention Alert	✓	—
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Rear 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
Brake Drying	✓	—
Front Ventilated Disc Brakes	✓	✓
Rear Solid Disc Brakes	✓	—
Brake Preparation System	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Front Fog Lights	✓	—
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	3	2
Rear Height Adjustable Headrests	✓	—
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	—
Engine Immobilizer	✓	✓
Lane Departure Warning	—	✓
Lane Keeping Assist System	—	✓
Rear Ventilated Disc Brakes	—	✓
Cornering Lights	—	✓

Engine

Feature	Mercedes-Benz	Cadillac
Base Engine Displacement	2.0 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	mild hybrid	gas
Horsepower	221 hp @ 5500 rpm	235 hp @ 5000 rpm
Torque	258 lb-ft @ 1800 rpm	258 lb-ft @ 1500 rpm
Number of Valves	16	16
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓
Cylinder Deactivation	—	✓

Drive Train

Feature	Mercedes-Benz	Cadillac
Transmission Type	8-speed automated manual	9-speed shiftable automatic
Drivetrain Type	front wheel drive	front wheel drive

Fuel

Feature	Mercedes-Benz	Cadillac
Fuel Type	premium unleaded (required)	premium unleaded (recommended)
EPA Fuel Economy (City/Highway)	25/33 MPG	22/29 MPG
EPA Fuel Economy (Combined)	28 MPG	24 MPG
EPA Driving Range (City/Highway)	397.5/524.7 mi.	418.0/551.0 mi.
Fuel Tank Capacity	15.9 gal.	19.0 gal.

Comfort & Convenience

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

In Car Entertainment

Feature	Mercedes-Benz	Cadillac
Infotainment Display	10.25 in	8.0 in
AM/FM Stereo	✓	✓
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	6 months	3 months
Premium Speaker Brand	—	Bose
Speaker System	—	8
Auxiliary Audio Input	—	✓
Speed Sensitive Volume Control	—	✓

Power Feature

Feature	Mercedes-Benz	Cadillac
One-Touch Power Windows	4	4
Keyless Entry	✓	✓
Heated Mirrors	✓	✓

Frontseats

Feature	Mercedes-Benz	Cadillac
Front Head Room	40.7 in.	39.7 in.
Front Leg Room	41.1 in.	41.2 in.
Front Shoulder Room	55.9 in.	58.3 in.
Seat Material: Leatherette	✓	✓
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	8-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	—
Driver Seat Thigh Extension	✓	—
Driver Seat Memory Settings	3	—
Passenger Seat Power Adjustments	8-way	6-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	—
Passenger Seat Thigh Extension	✓	—
Passenger Seat Memory Settings	3	—
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Front Hip Room	—	56.1 in.
Passenger Seat Manual Adjustments	—	2-way

Rearseats

Feature	Mercedes-Benz	Cadillac
Rear Head Room	39.3 in.	38.4 in.
Rear Leg Room	38.1 in.	39.0 in.
Rear Shoulder Room	54.9 in.	56.3 in.
Split-Folding Rear Seatback	✓	✓
Reclining Rear Seats	✓	✓
Folding Center Armrest	✓	✓
Rear Hip Room	—	54.8 in.

Tires and Wheels

Feature	Mercedes-Benz	Cadillac
Wheel Material	Alloy	—
Wheel Size	18 x 7.5 in	—
Tire Size	235/55R18	P235/65R
Run Flat Tires	✓	—
Wheel Finish	—	Painted Alloy
Wheel Diameter	—	18 in
Tire Type	—	All Season
Spare Tire Type	—	Temporary
Spare Tire Location	—	Inside Mounted

Suspension

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

Warranty

Feature	Mercedes-Benz	Cadillac
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	6 yr./ 70000 mi.
Corrosion/Rust Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Roadside Assistance	4 yr./ 50000 mi.	6 yr./ 70000 mi.
Complimentary Scheduled Maintenance	—	1 yr./ unlimited mi.

Frequently Asked Questions

Common questions about comparing the 2025 Mercedes-Benz GLB-Class and 2026 Cadillac XT5.

Is the fuel economy difference between the 2025 GLB-Class and 2026 XT5 significant enough to matter?

Yes, the GLB-Class offers 28 MPG combined while the XT5 achieves 24 MPG combined. If you drive 15,000 miles annually, that 4 MPG difference translates into noticeable savings over the course of a year, despite both requiring premium fuel.

Which crossover is better for loading bulky items like strollers or sports equipment?

The 2026 Cadillac XT5 is the clear winner for cargo hauling. It boasts 30 cubic feet of cargo space behind the second row, which dwarfs the 22 cubic feet offered by the Mercedes-Benz GLB-Class.

How much bigger is the 2026 Cadillac XT5 physically than the GLB-Class?

The Cadillac XT5 is noticeably longer, measuring 189.6 inches in length compared to the GLB-Class at 182.4 inches. It is also wider, contributing to its larger overall footprint and interior volume.

Does the power difference between the two vehicles feel substantial in daily driving?

The difference is modest; the XT5 offers 235 hp and 258 lb-ft of torque, slightly edging out the GLB’s 221 hp and identical torque rating. Both are front-wheel drive setups, so acceleration will feel adequate for most tasks, but the XT5 holds a slight edge in peak output.

Considering the price, why is the Mercedes GLB-Class MSRP higher if it has less horsepower?

The 2025 GLB-Class has a starting MSRP of $45,800, $1,500 more than the $44,300 Cadillac XT5. The price difference reflects brand positioning and engineering, as the GLB achieves better MPG figures despite its higher starting cost.

Are there any differences in the type of premium fuel required?

Both vehicles require premium unleaded, but their requirements differ slightly in necessity. The Mercedes GLB-Class mandates premium unleaded, whereas the Cadillac XT5 lists premium unleaded as 'recommended,' suggesting it can run on lower octane if necessary.