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In-depth reviews

Mercedes B-Class review - MPG, CO2 and Running Costs

Impressive economy, especially from the diesel versions, but there's no plug-in hybrid

Unlike some of its rivals – most notably the BMW 2 Series Active Tourer – there’s no plug-in hybrid version of the B-Class, which means you’re restricted to conventional petrol and diesel engines. Not that this means anything other than impressive levels of fuel economy.

The 1.5-litre diesel in the B 180 model is the eco-champion, delivering between 51.4mpg and 60.1mpg depending on the choice of wheels. The 2.0-litre diesel first seen in the E-Class isn’t too far behind, offering 51.4mpg to 57.7mpg in the B 200d and 50.4mpg to 56.5mpg in the B 220d.

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Predictably, the petrol engines aren’t as efficient, but these are the units to go for if you intend to do anything less than 12,000 miles in a year. The 1.33-litre in the B 180 is the most economical, delivering between 40.4mpg and 47.1mpg.

This engine is also found in the more powerful B 200, but the economy drops to between 39.8mpg and 46.3mpg. Of the two 2.0-litre petrol variants, the B 250 is the most efficient, delivering 36.7mpg to 40.4mpg. Opt for the B 220 4Matic and this drops to between 34mpg and 38.7mpg.

CO2 emissions range from 112g/km to 116g/km for the diesel variants and 125g/km to 153g/km for the petrol versions. All B-Class models will cost £140 per year in VED road tax, but go easy on the options if you want to avoid creeping through the £40,000 barrier, which would result in a £310 annual surcharge.

Insurance groups

The insurance groups haven’t been announced, but we’d expect the new B-Class to be a close match for the previous model. This would mean groups ranging from 12 for the B 180 Sport to 27 for the B 220 Sport.

Depreciation

The previous Mercedes B-Class held its value better than the majority of its mainstream rivals and we’d expect this new model to follow suit. In fact, with improved styling, keen dynamics and the very latest infotainment system, it’s likely to depreciate even slower.

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