In-depth reviews

Mercedes B-Class MPV - MPG, running costs & CO2

No hybrid option, but B-Class petrol and diesel engines are economical

Carbuyer Rating

4.1 out of 5

Owners Rating

3.0 out of 5

Read owner reviews
MPG, running costs & CO2 Rating

4.0 out of 5

Like the BMW 2 Series Active Tourer, the B-Class is now available in plug-in hybrid form as well as with conventional petrol and diesel engines. Claimed fuel economy for the diesels is impressive but the B 200 petrol has quite a thirst for fuel. You can spec a B-Class with either a seven or eight-speed automatic gearbox.

Mercedes B-Class MPG & CO2

The 114bhp 1.5-litre diesel is the economy champion of the conventional B-Class range – Mercedes claim it can achieve up to 53.3 mpg depending on the size of wheels fitted.

The latest B-Class is also offered with the 2.0-litre diesel engine that debuted in the Mercedes E-Class. It features here with an eight-speed twin-clutch DCT automatic gearbox (all other B-Class models get the older seven-speed DCT) and can be chosen as a 148bhp B 200 d that manages up to 54.3mpg, or as a 188bhp B 220 d that returns an identical figure. As this engine complies with Real Driving Emissions 2 (RDE2) standards, it's not subject to the 4% BiK diesel surcharge that affects the 1.5-litre diesel fitted to the B 180 d, and so the B 200 d has a lower company-car tax band - the lowest in the diesel range, in fact.

The 1.3-litre petrol engine will suit those who cover fewer than 12,000 miles a year, or who make primarily shorter journeys. It produces 134bhp in the B 180 or 161bhp as a B 200, which both return up to 44.8mpg. A 2.0-litre petrol was also available with 221bhp in the B 250 but has now been discontinued.

Business drivers are likely to flock to the B 250 e plug-in hybrid because its electric motor and battery pack give it a zero emissions range of up to 42 miles before the petrol engine kicks in. This elevates its fuel economy to 235mpg, while slashing CO2 emissions to 27g/km, for a very low BiK band. Charging at its maximum of 7.4kW can replenish the battery in just over an hour, while topping up with a domestic plug takes around 5.5 hours.

The B-Class will cost £150 per year in road tax, unless you get carried away with the options list and take the price of your car through the £40,000 barrier. If this happens, your car will face a £325 annual road tax surcharge, taking the total to £475 per year the first five times your road tax is due. It will, however, revert to £150 per year from the sixth time it's taxed. The plug-in hybrid costs £10 less a year to tax.

Insurance

The Mercedes B-Class starts in insurance group 19 for the B180 d, while the B 220 d sits in a rather high group - 30 out of 50. The petrol B180 Sport starts in group 22, while the B 200 is in 25.

Servicing

Every Mercedes car requires a service annually or every 15,500 miles – whichever occurs first. You can take out a service plan to cover two, three of four services, paid either in a single lump sum or on a monthly basis. This makes it easier to budget for routine maintenance, as a workshop visit can vary in cost depending on whether an interim 'A' or major 'B' service is due, and whether mileage-dependent items like fuel and air filter replacement are necessary.

Warranty

Mercedes supplies every UK car with a three-year/unlimited mileage warranty, which can be extended at extra cost when it expires. It's worth noting that Mercedes extended warranties are subject to certain exclusions, particularly when it comes to body and engine seals and electrical wiring.

Most Popular

Car dashboard warning lights: the complete guide
Car dashboard symbols and meanings
Tips and advice
13 Apr 2021

Car dashboard warning lights: the complete guide

Best new car deals 2021
Skoda Fabia
Deals
16 Apr 2021

Best new car deals 2021

New 2022 Nissan X-Trail makes debut
2022 Nissan X-Trail - front 3/4 view
Nissan X-Trail
19 Apr 2021

New 2022 Nissan X-Trail makes debut

Tips & advice

View All
Car dashboard warning lights: the complete guide
Car dashboard symbols and meanings
Tips and advice
13 Apr 2021

Car dashboard warning lights: the complete guide

Electric car charging stations: a complete guide
Tips and advice
10 Nov 2020

Electric car charging stations: a complete guide

PCP vs HP – what's the difference?
Tips and Advice
23 Mar 2020

PCP vs HP – what's the difference?

Average speed cameras: how do they work?
Average speed cameras: how do they work?
Tips and advice
24 Feb 2021

Average speed cameras: how do they work?

Best cars

View All
Best car interiors
Best cars
10 Mar 2020

Best car interiors

Best electric cars
Best cars
24 Dec 2020

Best electric cars

Best cheap-to-run cars
Toyota Prius front 3/4 cornering
Best cars
1 Feb 2021

Best cheap-to-run cars

The UK's top 10 fastest hot hatchbacks
Hot hatches
9 Apr 2020

The UK's top 10 fastest hot hatchbacks