In-depth reviews

Mercedes GLB SUV - MPG, running costs & CO2

Efficient combustion engines, with a plug-in and fully electric model on the way

Carbuyer Rating

4.0 out of 5

The GLB uses a variety of turbocharged petrol and diesel engines from the existing Mercedes engine range, all of which are modern and tuned for efficiency, and it boasts decent economy figures for a boxy SUV. 

However, if you're after more than around 50mpg, a plug-in hybrid version is expected to arrive in due course, alongside the fully electric EQB model that rivals the Ford Mustang Mach-E and Tesla Model Y.

Mercedes GLB MPG & CO2

Impressively for a fairly big car, the petrol engine's figures aren't too far behind those of the diesel. The GLB 200 can return up to 39.2mpg with CO2 emissions of 163g/km, putting it in a high Benefit-in-Kind (BiK) band for business buyers. The entry-level model's figures are helped by front-wheel drive and an efficient automatic gearbox.

Choose the diesel GLB 200d with front-wheel drive and it can deliver up to 49.6mpg and 148g/km of CO2, figures which slip to 47.9mpg and 155g/km when fuel-sapping four-wheel drive is added. There's also a range-topping GLB 220 d 4MATIC, returning almost identical figures.

Insurance groups

Choose a petrol GLB and the entry-level Sport trim starts from insurance group 27 out of 50, increasing to 29 for the top AMG Line Premium grade. The diesels kick off from group 29, while the range-topping 220 d is in group 36. This won't make the GLB cheap to insure, but the Land Rover Discovery Sport spans up to group 39, and rivals like the BMW X3 are also in roughly similar groups. 

Warranty

Mercedes matches BMW and Land Rover, offering a three-year/unlimited-mileage warranty on its new models, with up to 30 years of cover against corrosion. This also includes Pan-European Roadside Assistance, that you can keep going for up to 30 years if you have services carried out within the dealership network. The warranty is slightly more generous than the 60,000 miles of cover offered with the Audi Q3 and Volkswagen Tiguan Allspace.

Servicing

Mercedes offers ServiceCare, with the option of spreading the cost over monthly installments if you want to. ServiceCare guarantees the price of parts and labour for up to four services, protecting against inflation. Service costs such as brake fluid, spark plugs, air filters, fuel filters and screen wash are included.

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