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Expert Rating

Mercedes-Benz B-Class

(2019 – present)

Expert Rating

New car score:

70
%
B

Used car score:

71
%
A

Expert Rating report card

Media Rating:

66
%
C

Safety Rating:

74
%
B

Eco Rating:

74
%
A

Reliability Rating:

76
%
C

Running Costs:

67
%
B

How are our Expert Rating scores calculated?

Expert Rating

New car score:

70
%
B

Used car score:

71
%
A

Expert Rating report card

Media Rating:

66
%
C

Safety Rating:

74
%
B

Eco Rating:

74
%
A

Reliability Rating:

76
%
C

Running Costs:

67
%
B

Summary


The original Mercedes-Benz B-Class was first launched in 2005 as a small MPV. However, the current third-generation version of 2019 is now, more or less, a bigger variant of the A-class hatchback. Even the Mercedes-Benz website refers to it as a hatchback rather than an MPV.

As Carbuyer states: “The B-Class aims to blend the quality, refinement and high-tech interior of the A-Class with greater space and practicality.”

There is plenty of powertrain choice in the Mercedes-Benz B-Class, with a selection of petrol, diesel and plug-in hybrid options on offer. On the road testers generally describe it as comfortable to travel in but dull behind the wheel, though Car concludes: “it’s far from rubbish to drive.”

Interior space also scores with reviewers, although it further shows how Mercedes has abandoned any attempt to position the B-Class as an MPV – it’s lacking the usual seven-seat capability and the boot is not as big as you might expect. “There’s plenty of headroom front and rear, and legroom is acceptable,” says Company Car Today.

The interior finish comes in for more praise, Parkers describing it as “a vast improvement over the previous generation car” and highlighting the high-tech environment that has replaced previous dated buttons, especially the touchscreens which are dubbed best-in-class.

All this tech comes at a price, however, and several testers dub the B-Class an expensive option. “It’s fully loaded, although that’s going to cost you,” says The Telegraph and Company Car Today points out that some of the desirable tech is bundled into expensive options packs.

A facelifted B-Class arrived in the UK in late 2022 with minor updates to engines and trims. A plug-in hybrid version of the B-Class was previously offered but is no longer available.

As of January 2024, the Mercedes-Benz B-Class holds a New Car Expert Rating of D, with a score of 70%. It gets good marks for low CO2 emissions, while its safety rating and running costs are also good.

B-Class highlights

  • Lots of space
  • Comfortable on the road
  • Stylish visuals
  • Quality finish
  • Lots of tech

B-Class lowlights

  • Dull driving experience
  • Expensive for what it is
  • Not a true MPV like previous models
  • Boot could be bigger

Key specifications


Body style: Five-door hatch
Engines: petrol, diesel
Price: From £35,125 on-road

Launched: Spring 2019
Last updated: Winter 2022/23
Next update due: TBA


Media reviews


Reviews, road test and comparisons from across the UK automotive media. Click any of the boxes to view.

Auto Express

+

Auto Trader

+

Autocar

+

Car

+

Car Keys

+

Carbuyer

+

Carwow

+

Company Car Today

+

Eurekar

+

Heycar

+

Honest John

+

Parkers

+

The Telegraph

+

Top Gear

+

What Car?

+

Safety rating


Independent crash test and safety ratings from Euro NCAP

Overall score: 5 stars
Date tested: July 2019
Read the full Euro NCAP review

Adult protection: 96%
Child protection: 90%
Vulnerable road users: 78%
Safety assist: 75%

More safety recognition

The current Mercedes-Benz B-Class was tested by Euro NCAP in 2019 and scored a maximum five-star rating – the standard-fit autonomous emergency braking was praised and the active safety systems scored maximum points for detection of cyclists.

Eco rating


Independent economy and emissions ratings from Green NCAP

No eco rating

As of January 2024, the Mercedes-Benz B-Class has not yet been lab tested by Green NCAP.

Reliability rating

MotorEasy logo 600x167

Reliability data provided exclusively for The Car Expert by MotorEasy

All data based on MotorEasy average workshop costs for extended car warranty claims

As of January 2024, the Mercedes-Benz B-Class is slightly above average when it comes to reliability with a score of 69%, according to workshop and warranty data provided by our commercial partner, MotorEasy. This covers both the current model (2019 onwards) as well as earlier generations.

The average repair costs is also reasonably high at about £700. That’s obviously a lot more than the cost of a used car warranty, which is certainly worth considering if you own a B-Class or are thinking about buying one.

The most common problems reported for the B-Class are electrical system and suspension. Engine problems are not uncommon, and it’s worth noting that the average repair bill for engine problems is nearly £2,000.

Make sure that any used car warranty you are purchasing covers all of these potential problem areas.

Running cost rating

Clear Vehicle Data logo close crop

Monthly cost of ownership data provided exclusively for The Car Expert by Clear Vehicle Data

Fuel consumptionAverageScoreVariationScore
Petrol models45 mpgC40 – 46 mpgC – D
Diesel models54 mpgB51 – 55 mpgB – B
Plug-in hybrid models245 mpgA235 – 257 mpgA – A
CO₂ outputAverageScoreVariationScore
Petrol models141 g/kmB138 – 162 g/kmB – C
Diesel models138 g/kmB122 – 145 g/kmA – B
Plug-in hybrid models26 g/kmA24 – 28 g/kmA – A
Battery rangeAverageScoreVariationScore
Plug-in hybrid models41 milesD40 – 43 milesD – D
Electrical efficiencyAverageScoreVariationScore
EV models4.4 m/KWhB4.4 – 4.4 m/KWhB – B
Insurance groupAverageScoreVariationScore
All models23B19 – 30A – C
Service and maintenanceCostScore
Year 1£233B
Year 2£585B
Year 3£1,064C
Year 4£1,238B
Year 5£1,661B
Overall£4,781B

Running costs for the Mercedes-Benz B-Class are reasonably good, according to numbers provided exclusively for The Car Expert by our data partner, Clear Vehicle Data.

Fuel consumption is average for petrol models but better for diesel versions. The plug-in hybrid looks amazing on paper, but this is misleading because of the way that the EU/UK government lab tests are conducted. There’s no way you’re going to drive for 245 miles on a single gallon (4.5 litres) of petrol and some electricity in the real world.

When running on its electric motor, the B-Class plug-in hybrid is quite efficient – although on any plug-in hybrid, the battery range is very limiting. You’ll need to keep it charged every day if you want to get the best economy out of it.

Insurance and servicing sosts are better than average, which will help your wallet from emptying itself at annual service time.

Similar cars


If you’re looking at the Mercedes-Benz B-Class, you might also be interested in these alternatives

BMW 2 Series Active Tourer | Volkswagen Touran


More news, reviews and information about the Mercedes-Benz B-Class at The Car Expert

Everything you need to know about Mercedes-Benz

Everything you need to know about Mercedes-Benz

Mercedes-Benz reveals A-Class and B-Class facelift

Mercedes-Benz reveals A-Class and B-Class facelift

Mercedes-Benz B-Class plug-in hybrid announced

Mercedes-Benz B-Class plug-in hybrid announced

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The Mercedes-Benz B-Class is just about the most stylish people-carrier out there and with lots of tech, but this is reflected in its price. Mercedes-Benz B-Class