2025 Mercedes-Benz GLB-Class vs 2026 Kia Sportage Plug-In Hybrid

$45,800 · Crossover

$40,490 · Crossover

Comparison Overview

Deciding between established luxury and modern hybrid efficiency is a common sticking point for crossover shoppers. The 2025 Mercedes-Benz GLB-Class starts at a higher MSRP of $45,800 and requires premium fuel, but it offers a slightly more compact footprint at 182.4 inches long. Conversely, the 2026 Kia Sportage Plug-In Hybrid targets savings and utility, priced nearly $5,310 less at $40,490 and achieving 36 combined MPG versus the GLB's 28 MPG. While the Mercedes offers 221 hp and 258 lb-ft of torque through its front-wheel-drive setup, the Kia pushes out 268 hp and 271 lb-ft of torque, complemented by standard All-Wheel Drive and an impressive 33 miles of electric range. The Kia also dwarfs the GLB in storage, boasting 34.5 cu ft of cargo space compared to the Mercedes’ 22 cu ft, making the Kia a compelling package for the practical buyer.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Kia Sportage Plug-In Hybrid

The 2026 Kia Sportage PHEV offers significantly better fuel economy at 36 combined MPG and the ability to cover 33 miles on electric power alone, saving daily drivers money.

👨‍👩‍👧‍👦 Best for Families

2026 Kia Sportage Plug-In Hybrid

The Sportage PHEV provides substantially more utility with 34.5 cu ft of cargo capacity and standard All-Wheel Drive for better all-weather security.

🏎️ Best for Enthusiasts

2026 Kia Sportage Plug-In Hybrid

The Kia generates more immediate grunt with 268 hp and 271 lb-ft of torque, outperforming the GLB's 221 hp output.

💰 Best Value

2026 Kia Sportage Plug-In Hybrid

The Kia undercuts the Mercedes by $5,310, delivers better fuel economy, and uses less expensive regular unleaded gasoline.

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

You prefer the perceived prestige and design language associated with the Mercedes-Benz badge.
You regularly drive long distances where relying solely on the 33-mile EV range would be impractical.
You prefer the specific tuning of the 8-speed automated manual transmission offered by the GLB.

Choose the Kia Sportage Plug-In Hybrid if...

Your budget priority favors saving $5,310 on the initial purchase price.
You want superior utility, evidenced by 34.5 cu ft of cargo capacity compared to the GLB's 22 cu ft.
You prioritize lower running costs, benefiting from 36 combined MPG and the use of regular unleaded fuel.

Key Dimensions

Dimension	Mercedes-Benz GLB-Class	Kia Sportage Plug-In Hybrid
Length	182.4"	184.4"
Width	72.2"	73.4"
Height	66.7"	66.9"
Wheelbase	111.4"	108.5"

Features Comparison

Safety

Feature	Mercedes-Benz	Kia
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	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Lane Departure Warning	—	✓
Lane Keeping Assist System	—	✓
Rear Cross Traffic Alert	—	✓
Dual Rear Side-Mounted Airbags	—	✓

Engine

Feature	Mercedes-Benz	Kia
Base Engine Displacement	2.0 L	1.6 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	mild hybrid	plug-in hybrid
Horsepower	221 hp @ 5500 rpm	268 hp
Torque	258 lb-ft @ 1800 rpm	271 lb-ft
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	Mercedes-Benz	Kia
Transmission Type	8-speed automated manual	6-speed shiftable automatic
Drivetrain Type	front wheel drive	all wheel drive
Center Differential Type	—	Locking
Hill Descent Control	—	✓

Fuel

Feature	Mercedes-Benz	Kia
Fuel Type	premium unleaded (required)	regular unleaded
EPA Fuel Economy (City/Highway)	25/33 MPG	35/36 MPG
EPA Fuel Economy (Combined)	28 MPG	36 MPG
EPA Driving Range (City/Highway)	397.5/524.7 mi.	388.5/399.6 mi.
Fuel Tank Capacity	15.9 gal.	11.1 gal.
EPA Efficiency (City/Highway MPGe)	—	87/78 MPGe
EPA Efficiency (Combined MPGe)	—	83 MPGe
EPA Electric Driving Range	—	33 mi.
EPA Energy Consumption (kWh/100 mi)	—	43
Charging Time (240V)	—	2.0 hr.
DC Fast Charging Port Type	—	SAE J1772

Comfort & Convenience

Feature	Mercedes-Benz	Kia
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	✓	✓
Adaptive Cruise Control	—	✓
Extended Cabin Heating/Cooling	—	✓

In Car Entertainment

Feature	Mercedes-Benz	Kia
Infotainment Display	10.25 in	12.3 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
Speaker System	—	6

Power Feature

Feature	Mercedes-Benz	Kia
One-Touch Power Windows	4	2
Keyless Entry	✓	✓
Heated Mirrors	✓	✓
Moonroof Type	—	1st Row Power Glass Extended

Frontseats

Feature	Mercedes-Benz	Kia
Front Head Room	40.7 in.	39.6 in.
Front Leg Room	41.1 in.	41.4 in.
Front Shoulder Room	55.9 in.	57.5 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	Power
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	—
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Front Hip Room	—	54.8 in.
Passenger Seat Manual Adjustments	—	4-way

Rearseats

Feature	Mercedes-Benz	Kia
Rear Head Room	39.3 in.	39.1 in.
Rear Leg Room	38.1 in.	39.5 in.
Rear Shoulder Room	54.9 in.	55.6 in.
Split-Folding Rear Seatback	✓	✓
Reclining Rear Seats	✓	✓
Folding Center Armrest	✓	✓
Rear Hip Room	—	53.4 in.

Tires and Wheels

Feature	Mercedes-Benz	Kia
Wheel Material	Alloy	—
Wheel Size	18 x 7.5 in	19 x 7.5 in
Tire Size	235/55R18	235/55R19
Run Flat Tires	✓	—
Wheel Finish	—	Painted Alloy
Tire Type	—	All Season

Suspension

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

Warranty

Feature	Mercedes-Benz	Kia
Basic Warranty	4 yr./ 50000 mi.	5 yr./ 60000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	10 yr./ 100000 mi.
Corrosion/Rust Warranty	4 yr./ 50000 mi.	5 yr./ 100000 mi.
Roadside Assistance	4 yr./ 50000 mi.	5 yr./ 60000 mi.
EV Battery Warranty	—	10 yr./ 100000 mi.
Hybrid Component Warranty	—	10 yr./ 100000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Mercedes-Benz GLB-Class and 2026 Kia Sportage Plug-In Hybrid.

How much better is the fuel economy between the GLB and the Sportage PHEV?

The Kia Sportage PHEV is significantly more efficient, achieving 36 combined MPG, whereas the Mercedes GLB is rated for only 28 combined MPG. Furthermore, the Kia offers 33 miles of pure electric range before engaging its gas engine.

Is the required premium fuel in the Mercedes GLB a major long-term cost?

Yes, requiring premium unleaded fuel will increase operational costs compared to the Kia, which uses regular unleaded. This difference compounds the $5,310 initial price saving the Kia offers.

Which vehicle offers more space for gear and luggage?

The 2026 Kia Sportage PHEV is the clear winner for cargo space, offering 34.5 cu ft behind the rear seats, significantly exceeding the 22 cu ft available in the 2025 Mercedes-Benz GLB-Class.

Does the lower horsepower in the GLB make it feel sluggish compared to the Kia?

The Kia Sportage PHEV boasts 268 hp and 271 lb-ft of torque, considerably higher than the GLB's 221 hp and 258 lb-ft, suggesting the Kia will feel punchier in acceleration.

Which crossover is better equipped for severe weather driving?

The 2026 Kia Sportage PHEV comes standard with All-Wheel Drive, offering better traction capabilities than the standard Front Wheel Drive system found on the base model Mercedes-Benz GLB-Class.

How do the physical dimensions compare between these two crossovers?

They are closely matched in size, but the Kia is slightly longer (184.4 inches vs. 182.4 inches) and slightly wider (73.4 inches vs. 72.2 inches) than the Mercedes GLB.