2025 Cadillac XT6 vs 2026 Mercedes-Benz GLB

$49,195 · Crossover

$43,800 · Crossover

Comparison Overview

The 2025 Cadillac XT6 bursts forth with an imposing presence and a stout 235 hp from its standard engine, aiming for premium American luxury straight out of the gate with a $49,195 MSRP. In sharp contrast, the 2026 Mercedes-Benz GLB offers Teutonic efficiency and practicality in a more compact footprint, starting significantly lower at $43,800 and boasting a fantastic 28 combined MPG. While the XT6 is substantially longer at 198.5 inches versus the GLB's 182.4 inches, it sacrifices fuel economy, achieving only 23 combined MPG compared to the Mercedes' superior efficiency. Furthermore, the GLB overwhelms the Cadillac in utility, offering 22 cu ft of cargo space against the XT6's meager 12.6 cu ft. Despite the performance gap being narrow—258 lb-ft of torque for both—the real story is the $5,395 initial price savings combined with a 5 MPG advantage that firmly positions the GLB as the pragmatic choice.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Mercedes-Benz GLB

The 2026 Mercedes-Benz GLB wins for commuters due to its superior fuel economy, achieving 33 highway MPG versus the XT6's 27 MPG.

👨‍👩‍👧‍👦 Best for Families

2026 Mercedes-Benz GLB

The GLB offers vastly more usable space for families, providing 22 cu ft of cargo capacity compared to the XT6's 12.6 cu ft.

🏎️ Best for Enthusiasts

2025 Cadillac XT6

The 2025 Cadillac XT6 has a slight edge in output, offering 235 hp to the GLB's 221 hp, favoring those who prioritize peak power.

💰 Best Value

2026 Mercedes-Benz GLB

The Mercedes-Benz GLB delivers substantial value by costing $5,395 less upfront while offering significantly better fuel efficiency.

Choose the Cadillac XT6 if...

You prioritize a larger physical presence, as the XT6 measures 198.5 inches in length.
You want the highest standard horsepower rating available between the two models, delivering 235 hp.
You prefer the established prestige and styling associated with the Cadillac brand's larger offerings.

Choose the Mercedes-Benz GLB if...

Your budget is primary, as the GLB saves you $5,395 in starting MSRP compared to the XT6.
Maximum cargo utility is essential, as the GLB offers 22 cu ft versus the XT6's 12.6 cu ft.
You value maximizing road trips efficiency, where the GLB delivers 33 highway MPG versus the XT6's 27 MPG.

Key Dimensions

Dimension	Cadillac XT6	Mercedes-Benz GLB
Length	198.5"	182.4"
Width	77.3"	72.2"
Height	69.9"	66.7"
Wheelbase	113.0"	111.4"

Features Comparison

Safety

Feature	Cadillac	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	✓	✓
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 Preparation System	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Cornering Lights	✓	—
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	2	3
Rear Center 3-Point Seatbelt	✓	✓
Engine Immobilizer	✓	✓
Driver Attention Alert	—	✓
Brake Drying	—	✓
Rear Solid Disc Brakes	—	✓
Front Fog Lights	—	✓
Rear Height Adjustable Headrests	—	✓
Anti-Theft Alarm System (Remote)	—	✓

Engine

Feature	Cadillac	Mercedes-Benz
Base Engine Displacement	2.0 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	gas	mild hybrid
Horsepower	235 hp @ 5000 rpm	221 hp @ 5500 rpm
Torque	258 lb-ft @ 1500 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	✓	✓
Cylinder Deactivation	✓	—

Drive Train

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

Fuel

Feature	Cadillac	Mercedes-Benz
Fuel Type	premium unleaded (recommended)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	21/27 MPG	25/33 MPG
EPA Fuel Economy (Combined)	23 MPG	28 MPG
EPA Driving Range (City/Highway)	399.0/513.0 mi.	397.5/524.7 mi.
Fuel Tank Capacity	19.0 gal.	15.9 gal.

Comfort & Convenience

Feature	Cadillac	Mercedes-Benz
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	✓	✓
Cruise Control	✓	✓
Universal Remote Transmitter	✓	—
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
3rd Row Cupholders	✓	—
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Power Rear Seat Easy Entry	✓	—
Leather Steering Wheel	✓	✓
Three Zone Climate Control	✓	—
Rear Ventilation Ducts with Fan Control	✓	—
Interior Air Filtration	✓	✓
Sun Sensor	✓	—
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Driver Assisted Parking Assist	—	✓
Overhead Console with Storage	—	✓
Dual Zone Climate Control	—	✓
Rear Ventilation Ducts	—	✓

In Car Entertainment

Feature	Cadillac	Mercedes-Benz
Infotainment Display	8.0 in	10.25 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	Bose	—
Speaker System	8	—
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	Cadillac	Mercedes-Benz
One-Touch Power Windows	4	4
Moonroof Type	1st Row Power Glass Extended	—
Keyless Entry	✓	—
Heated Mirrors	✓	✓
Remote Keyless Entry	—	✓

Frontseats

Feature	Cadillac	Mercedes-Benz
Front Head Room	39.8 in.	40.7 in.
Front Leg Room	41.2 in.	41.1 in.
Front Shoulder Room	58.3 in.	55.9 in.
Front Hip Room	50.1 in.	—
Seat Material: Leatherette	✓	✓
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	8-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Memory Settings	2	3
Passenger Seat Power Adjustments	6-way	8-way
Passenger Seat Manual Adjustments	2-way	—
Passenger Seat Height Adjustment	✓	✓
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Driver Seat Lumbar Support	—	Power
Driver Seat Thigh Extension	—	✓
Passenger Seat Lumbar Support	—	Power
Passenger Seat Thigh Extension	—	✓
Passenger Seat Memory Settings	—	3

Rearseats

Feature	Cadillac	Mercedes-Benz
Rear Head Room	39.1 in.	39.3 in.
Rear Leg Room	39.1 in.	38.1 in.
Rear Shoulder Room	57.4 in.	54.9 in.
Rear Hip Room	55.7 in.	—
Split-Folding Rear Seatback	✓	✓
Folding Center Armrest	✓	✓
Power Folding Third Row Seat	✓	—
Reclining Rear Seats	—	✓

Tires and Wheels

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

Suspension

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

Warranty

Feature	Cadillac	Mercedes-Benz
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	6 yr./ 70000 mi.	4 yr./ 50000 mi.
Corrosion/Rust Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Roadside Assistance	6 yr./ 70000 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 2025 Cadillac XT6 and 2026 Mercedes-Benz GLB.

Which vehicle provides a better highway cruising experience based on MPG?

The 2026 Mercedes-Benz GLB is the clear winner for highway efficiency, achieving 33 MPG on the highway compared to the 2025 Cadillac XT6's 27 MPG. This difference equates to fewer fuel stops over long distances.

Is the power output significantly different between these two crossovers?

The difference is minor; the Cadillac XT6 produces 235 hp, slightly edging out the Mercedes GLB which generates 221 hp. Both vehicles share the same 258 lb-ft of torque.

How much larger is the cargo area in the GLB versus the XT6?

The 2026 Mercedes-Benz GLB offers significantly more utility with 22 cu ft of cargo capacity. The 2025 Cadillac XT6 is quite constrained in this area, providing only 12.6 cu ft.

Do these vehicles require different types of gasoline?

Yes, the 2025 Cadillac XT6 recommends premium unleaded fuel, while the 2026 Mercedes-Benz GLB actually requires premium unleaded fuel for its engine to operate optimally.

What is the advantage of the XT6's larger size?

The Cadillac XT6 is notably larger, measuring 198.5 inches in length and 77.3 inches in width, giving it a more substantial on-road presence compared to the smaller 182.4-inch GLB.