By clicking a retailer link you consent to third-party cookies that track your onward journey. This enables W? to receive an affiliate commission if you make a purchase, which supports our mission to be the UK's consumer champion.

Mercedes-BenzB-Class (2019-)

MPV
Petrol/Diesel/Mild hybrid
Available new

£34,465Typical price

Test score

where to buy or sell

The version of this car that we've reviewed might not be available to buy through all listed retailer links. For more options, see our guides on where to buy a car and how to sell a car.

Sign up to unlock the full expert review

Mercedes-Benz describes its B-Class as a 'Sports Tourer'. That signifies its intended role as a more practical model than the A-Class on which it's based, while retaining a sporty character. How well does the third-generation B-Class, launched in 2019, succeed? Can it beat rival hatchbacks? Find out in our full Mercedes-Benz B-Class review.

pros

Content has been blurred out, please log in to view.

cons

What's included?

What is it?
What's it great at?
What's it like to drive?
How reliable is the Mercedes-Benz B-Class (2019 to present)?
How comfortable and spacious is it?
How economical is it to run?
How safe is it?
Is there anything I should look out for?
Should I buy it?

KEY TEST RESULTS
Comfort and practicality
Model reliability 0-4 years
Brand reliability 0-4 years

Dec 2024Last checked by Which?
Oct 2019First reviewed by Which?
Dec 2018Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test cars

20 May 2025

Ease of driving

Overall
Visibility
Smoothness of power delivery
Driving stability
Cabin layout

How we test ease of driving

To find out how easy a car is to drive, we assess cars across a number of areas from visibility and handling to the layout of the cabin and how smoothly the engine delivers its power.

Performance

Overall
In-gear acceleration
Brakes

How we test performance

We test braking distances and whether the effectivess of the brakes fade with repeat use. Performanc is based on in-gear acceleration.

Comfort and practicality

Overall
Entry and exit
Seat comfort
Ride quality
Quietness
Seat space
Boot space (large cars, SUVs and MPVs)

How we test comfort and practicality

Comfort and practicality includes how easy it is, or not, to get in and out of the car and the maximum height of occupants. We also measure road, wind and engine noise and assess how well the car deals with bumps from large potholes to jittery surfaces like cobble stones.

Euro NCAP

How we test euro ncap

Any car that receives a rating of two stars or less from Euro NCAP is made a Don't Buy. Any car that receives three stars can't be a Best Buy. If a car has been available for more than four years and has not been tested by Euro NCAP, it cannot be a Best Buy.

Safety kit

How we test safety kit

We factor in the safety equipment that’s factory-fitted or optional, along with how well the car protects its occupants and pedestrians in the event of an accident. We also test how easy it is to fit a variety of child car seats.

Model reliability 0-4 years

How we test model reliability 0-4 years

How reliable this car is, based on the real life feedback of current owners as collected in our annual Which? car survey. We divide all reliability feedback into three age groups: cars aged up to four years, five to nine years, and 10 to 15 years. A car cannot be a Best Buy if: It's available to buy new and has a 0-4-year model reliability score of two stars or less; or it's only available on the used market and has a 5-9-year model reliability score of two stars or less; or it's only available on the used market and launched less than five years ago and has a 0-4-year model reliability score of two stars of less.

Brand reliability 0-4 years

Overall
Electric car reliability
Plug-in hybrid reliability
Petrol reliability
Diesel reliability

How we test brand reliability 0-4 years

Our reliability ratings are based on the feedback from tens of thousands of UK motorists, as collected in our annual Which? car survey. We divide all reliability feedback into three age groups: cars aged up to four years, five to nine years, and 10 to 15 years.

Brand reliability 5-9 years

Overall
Diesel reliability

Brand reliability 10-15 years

Overall
Petrol reliability
Diesel reliability

General
Class	MPV
Luxury	No
Convertible	No
Availability	Available new
New price	£34,465 - £42,820
Fuel type	Petrol/Diesel/Mild hybrid
Tested fuel efficiency	54.3mpg
Length	4,419mm
Width (excluding wing mirrors)	1,796mm
Width (including wing mirrors)	2,025mm
Height	1,562mm
Driver max height
Second-row passenger max height
Boot space with seats up
Boot space with seats down
Number of seats	5
Folding rear seats	Yes
Isofix attachments	Yes
Turning circle	11 m
On sale date	03 December 2018
Lowest pence-per-mile cost	£11.77

Latest tested engine
Engine and trim name	B220d Progressive 8G-DCT
Fuel type	Diesel
Capacity and power	2-litre (190hp)
Transmission	8-speed dual-clutch automatic
Driven wheels	Front-wheel-drive (FWD)
Fuel tank capacity	43 litres
Tested fuel economy: City / Out of town / Motorway (mpg)
Tested fuel economy: Combined (mpg)
Cost per mile	11.77p per mile
Cost of filling tank	£60
Monthly fuel cost
Annual fuel cost
NOx level	Extremely Low (trace)
CO level	Extremely Low (trace)
CO2 at tailpipe/tank-to-wheel (TTW) (g/km)	138
Official Euro emission level	Euro 6d
Braked tow load (KG)	1600kg
Unbraked tow load (KG)	750kg
Engine test date	08 July 2019
Test programme	2017

Suggested Alternatives

Volkswagen

Touran (2015-)

MPV
Petrol/Diesel/Mild hybrid
Available new

£38,338Typical price

Test score

BMW

2 Series Active Tourer (2022-)

MPV
Petrol/Diesel/Mild hybrid
Available new

£32,752Typical price

Test score

Renault

Grand Scenic (2009-2016)

MPV
Petrol/Diesel/Mild hybrid
Used only

£2,144Typical price

Test score

Best electric cars 2025
Our independent lab tests reveal the best electric cars with enough range to go the distance
How we test cars
Every car we review is subjected to hundreds of tests in our lab and on the road. Find out why you can trust our reviews, and how they help you choose the best car (and avoid the worst)
How to find cheap car insurance
Our 9-step guide to get cheaper car insurance quotes from price comparison sites and how to haggle with car insurance companies to save money

All new and used car advice

Suggested searches

Mercedes-BenzB-Class (2019-)

where to buy or sell