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Mercedes B Class vs Mercedes GLS comparison

Compare performance (238 HP vs 404 HP), boot space and price (33,100 £ vs 92,700 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or Mercedes GLS?

Mercedes B Class vs Mercedes GLS: Key differences

Mercedes B Class

4.9 (6 Reviews)
rate
  • significantly cheaper
  • substantially more efficient
  • significantly lighter
  • markedly more trunk space
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Mercedes GLS

  • substantially more power
  • a bit quicker 0–100 km/h
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All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

By Achim Sedelmaier

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

B Class

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Mercedes B Class is significantly cheaper – starting at 33,100 £ , while the Mercedes GLS costs 92,700 £ . That’s a price difference of around 59,533 £.

Fuel consumption also shows a difference: the Mercedes B Class uses 5.1 L/100km and is substantially more efficient than the Mercedes GLS with 7.9 L/100km. The difference is about 2.8 L/100km.

GLS

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 GLS offers substantially more power – delivering 404 HP compared to 238 HP. That’s roughly 166 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLS is a bit quicker – completing the sprint in 5.6 s, while the Mercedes B Class takes 6.5 s. That’s about 0.9 s quicker.

There’s also a difference in torque: the Mercedes GLS delivers considerably more torque with 750 Nm compared to 400 Nm. That’s about 350 Nm more.

B Class

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Seats: Mercedes GLS offers more seats – 7 vs 5.

In terms of curb weight, Mercedes B Class is significantly lighter – 1,405 kg compared to 2,580 kg. The difference is around 1,175 kg.

Looking at boot space, the Mercedes B Class offers markedly more boot space – 455 L compared to 355 L. That’s a difference of about 100 L.

When it comes to payload, the Mercedes GLS carries noticeably more – 820 kg compared to 550 kg. That’s a difference of about 270 kg.

Who wins the race in the data check?

The Mercedes B Class stands well ahead of its rival 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 £33,100
B Class

Mercedes B Class

  • Engine Type Petrol MHEV, Diesel
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 238 HP
  • Consumption L/100km 5.1 - 6.9 L/100km
Mercedes B Class
Mercedes GLS

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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Mercedes GLS

The GLS — usually just called the GLS — is Mercedes' flagship SUV, wrapping limousine-like comfort and commanding road presence into a smart, family-ready package. It pampers occupants with a hushed cabin, premium materials and intuitive tech, while still managing to feel confident and a little indulgent on the daily commute.

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Mercedes B Class
Mercedes GLS

Costs and Consumption

Price
33,100 - 52,500 £
Price
92,700 - 104,600 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
7.9 - 9.9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
206 - 226 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body

Body Type
MPV
Body Type
SUV
Seats
5
Seats
7
Doors
-
Doors
-
Curb weight
1,405 - 1,565 kg
Curb weight
2,580 - 2,670 kg
Trunk capacity
445 - 455 L
Trunk capacity
355 L
Length
-
Length
-
Width
1,796 mm
Width
1,956 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
810 - 820 kg

Engine and Performance

Engine Type
Petrol MHEV, Diesel
Engine Type
Petrol MHEV, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
116 - 238 HP
Power HP
336 - 404 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
5.6 - 6.2 s
Max Speed
-
Max Speed
-
Torque
200 - 400 Nm
Torque
560 - 750 Nm
Number of Cylinders
4
Number of Cylinders
6
Power kW
85 - 175 kW
Power kW
247 - 297 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
2,989 - 2,999 cm3

General

Model Year
2025
Model Year
2026
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Mercedes-Benz
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.