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Mercedes B Class vs Mercedes GLB comparison

Compare performance (238 HP vs 354 HP), boot space and price (33,100 £ vs 50,600 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or Mercedes GLB?

Mercedes B Class vs Mercedes GLB: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • substantially cheaper
  • substantially lighter

Mercedes GLB

3.2 (3 Reviews)
rate
  • clearly more power
  • considerably more electric range
  • slightly quicker 0–100 km/h
  • slightly more trunk space

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

B Class

Introduction: A Clash of Mercedes Titans

In the ever-evolving automotive market, the demand for versatile vehicles has led to the emergence of models that cater to both performance and practicality. The Mercedes B-Klasse and the Mercedes GLB exemplify this trend perfectly. While both vehicles embody the luxury and quality that the Mercedes-Benz brand is known for, they appeal to different types of consumers. Let’s dive deeper into their specifications, innovations, and overall performance to determine which model reigns supreme.

GLB

Body and Design: Function Meets Style

The Mercedes B-Klasse is designed as a Multi-Purpose Vehicle (MPV), boasting a compact body with a focus on practical use. Measuring 4,419 mm in length, 1,796 mm in width, and 1,562 mm in height, it provides ample space for five passengers while ensuring ease of maneuverability in urban settings. Its trunk capacity ranges from 405 to 455 liters, making it a solid choice for those who prioritize cargo space.

In contrast, the Mercedes GLB is an SUV, measuring between 4,634 mm and 4,650 mm in length and standing taller at 1,692 mm and 1,665 mm in height. With a wider frame of up to 1,850 mm, the GLB asserts its presence on the road. Notably, it offers greater trunk space, ranging from 565 liters, further enhancing its utility as a family vehicle or for adventure seekers.

B Class

Engine Options: Powering the Drive

Both models come with a variety of engine options to cater to different driving preferences. The B-Klasse offers a selection of petrol and diesel engines, including mild hybrid and plug-in hybrid variants. With power outputs ranging from 116 HP to 238 HP, it also boasts efficient fuel consumption rates, starting from as low as 5.1 L/100km.

The GLB, on the other hand, presents a slightly more robust range with similar petrol and diesel configurations. Power outputs peak at an impressive 320 HP, catering to drivers looking for a more spirited driving experience. Fuel consumption here is competitive as well, starting from 5.6 L/100km for the diesel variants, making it a practical choice for those who also seek efficiency.

GLB

Transmission and Drive: Smooth and Responsive

Both the B-Klasse and GLB utilize automatic transmissions with dual-clutch systems, ensuring smooth gear shifts and responsiveness. Consumers can choose between front-wheel drive and all-wheel drive configurations for both models, granting them the flexibility to adapt to different driving conditions, whether commuting in the city or venturing off the beaten path.

B Class

Performance and Handling: Acceleration and Top Speed

When it comes to performance, the B-Klasse exhibits impressive acceleration figures, capable of going from 0 to 100 km/h in as little as 6.5 seconds, depending on the engine variant. With a top speed reaching up to 250 km/h, it embodies the sporty characteristics that Mercedes is famous for.

The GLB also showcases strong performance with acceleration times as low as 5.5 seconds, making it a worthy adversary. Its top speed capabilities are similar, hitting up to 250 km/h, proving that even an SUV can deliver thrill and excitement behind the wheel.

GLB

Innovations and Technology: Leading the Charge

Both vehicles are equipped with the latest technological advancements that elevate the driving experience. The B-Klasse is designed with an intuitive MBUX infotainment system featuring a high-resolution display, voice activation, and smartphone integration. Safety is also paramount, with advanced driver assistance systems to ensure peace of mind on the road.

The GLB offers similar technological integrations, but it also stands out with additional innovations tailored for adventure, such as off-road driving modes and a more rugged design. Its spacious interior can be customized with a range of comfort features designed for longer trips, enhancing both driver and passenger convenience.

B Class

Conclusion: Choosing Your Mercedes

Ultimately, the decision between the Mercedes B-Klasse and the Mercedes GLB comes down to individual needs and preferences. The B-Klasse is the quintessential urban vehicle, exuding practicality and efficiency, while the GLB offers a more adventurous spirit with its SUV design and additional cargo space. Regardless of choice, both models embody the luxurious quality and performance that Mercedes-Benz promises.

Frequently compared as well

Mercedes B Class
Mercedes GLA
VS
The Mercedes B‑Class is the practical, airy people‑carrier that prioritises space and comfort, while the Mercedes GLA takes the same mechanical smarts and adds SUV looks, higher ride height and a touch more road presence. Pick the B‑Class for family‑friendly sense and efficiency, choose the GLA if …
Mercedes A Class
Mercedes B Class
VS
The Mercedes A‑Class is the sporty, tech‑savvy compact that thrills with sharp handling and a slick cockpit, while the Mercedes B‑Class trades a bit of attitude for towering practicality, roomier seats and a more useful boot. Choose the A‑Class if you want driving fun and style; pick the B‑Class if …

Here’s where it gets real: The technical differences in detail

B Class

Costs and Efficiency:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

Mercedes B Class is substantially cheaper – starting at 33,100 £ , while the Mercedes GLB costs 50,600 £ . That’s a price difference of around 17,483 £.

As for electric range, the Mercedes GLB offers considerably more range – reaching up to 631 km, about 548 km more than the Mercedes B Class.

GLB

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Mercedes GLB offers clearly more power – delivering 354 HP compared to 238 HP. That’s roughly 116 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLB is slightly quicker – completing the sprint in 5.5 s, while the Mercedes B Class takes 6.5 s. That’s about 1 s quicker.

There’s also a difference in torque: the Mercedes GLB delivers slightly more torque with 515 Nm compared to 450 Nm. That’s about 65 Nm more.

B Class

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes B Class is substantially lighter – 1,405 kg compared to 2,200 kg. The difference is around 795 kg.

Looking at boot space, the Mercedes GLB offers slightly more boot space – 540 L compared to 455 L. That’s a difference of about 85 L.

When it comes to payload, the Mercedes B Class carries very slightly more – 550 kg compared to 500 kg. That’s a difference of about 50 kg.

Who wins the race in the data check?

The Mercedes GLB is far ahead overall in the objective data comparison.
This result only shows which model scores more points on paper – not which of the two cars feels right for you.

from £50,600
GLB

Mercedes GLB

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 272 - 354 HP
  • Consumption kWh/100km : 15.8 - 15.9 kWh/100km
  • Electric Range : 614 - 631 km
details
Mercedes B Class
Mercedes GLB

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes B Class

The Mercedes B-Class is a smart, grown-up compact people carrier that dresses everyday practicality in a near‑premium polish, perfect for buyers who want comfort and a classy badge without the theatrics. It won’t set your pulse racing on a back road, but it will make school runs, commutes and grocery hauls feel pleasantly civilized — a reliable, slightly posh companion for real life.

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Reviews Mercedes B Class

4.9 (5 Reviews)
rate
Peter
5 Mar 2026, 05:51:19

My wife and I have been driving a Mercedes W247 200d for seven years now, with 93,000 km on the clock. The car is very comfortable even on long trips and economical. At the last service the pads of the electric parking brake were replaced; otherwise no repairs. We love this car.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

Mercedes GLB

The Mercedes GLB is a practical compact SUV that mixes boxy, family-friendly space with premium German polish, making it an appealing choice for buyers who want usefulness without pretension. It drives with a confident, composed feel and somehow manages to look both rugged and refined — the grown-up SUV that still likes to have fun.

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Reviews Mercedes GLB

3.2 (3 Reviews)
rate
Hans
19 Feb 2026, 02:39:00

Great car — very satisfied with the GLB 250 4MATIC.

How do you mainly use this car? (optional): Leisure / Weekend driver
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Mercedes B Class
Mercedes GLB

Costs and Consumption
Price
33,100 - 52,500 £
Price
50,600 - 62,400 £
Consumption L/100km
2.5 - 6.9 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
15.8 - 15.9 kWh/100km
Electric Range
83 km
Electric Range
614 - 631 km
Battery Capacity
12.9 kWh
Battery Capacity
-
co2
56 - 156 g/km
co2
0 g/km
Fuel tank capacity
35 L
Fuel tank capacity
-

Dimensions and Body
Body Type
MPV
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
-
Curb weight
1,405 - 1,745 kg
Curb weight
2,200 - 2,280 kg
Trunk capacity
405 - 455 L
Trunk capacity
540 L
Length
4,419 mm
Length
-
Width
1,796 mm
Width
1,861 mm
Height
1,562 mm
Height
-
Max trunk capacity
1,440 L
Max trunk capacity
-
Payload
505 - 550 kg
Payload
500 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
116 - 238 HP
Power HP
272 - 354 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
5.5 - 7.4 s
Max Speed
223 km/h
Max Speed
-
Torque
200 - 450 Nm
Torque
335 - 515 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
85 - 175 kW
Power kW
200 - 260 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
-

General
Model Year
2,024 - 2,025
Model Year
2,026
CO2 Efficiency Class
B, D, E, F
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
Mercedes-Benz
What drivetrain options does the Mercedes B Class have?

Available configurations include Front-Wheel Drive or All-Wheel Drive.

DriveDuel uses data analysis and artificial intelligence to evaluate vehicle data and create content. Content is regularly reviewed and improved. The displayed prices are estimates based on German list prices, adjusted to the respective country’s VAT. Country-specific registration taxes are not included. This information is not legally binding.