In-depth reviews

Mercedes GLA review - MPG, CO2 and running costs

The GLA petrol plug-in hybrid version is the most efficient choice, but make no mistake, running any Mercedes isn’t cheap.

Overall Auto Express Rating

4.0 out of 5

MPG, CO2 and running costs Rating

3.7 out of 5

Price
£24,775 to £41,925
  • Improved on-board tech
  • Comfort
  • Engine performance
  • Pricier than before
  • Not an engaging drive
  • Running costs

Mercedes has given customers a choice of refined petrol and diesel engines for its smallest SUV, but for those seeking the lowest running costs, the GLA 250 e plug-in hybrid model should be at the top of the list. 

Priced from around £40,000, the 250 e offers a claimed all-electric range of 37 miles, with combined fuel consumption of up to 201.8mpg. However, to achieve this impressive figure, you’ll need to ensure you keep the battery topped up and plug-in to recharge whenever possible. CO2 emissions of just 32g/km also mean there’s no first-year road tax to pay, while company car drivers will benefit from a BiK tax rate of just 10%.

The petrol GLA 180 and 200 models both offer a maximum 42.8mpg on the combined cycle, with CO2 emissions from 151g/km. Opting for the more powerful GLA 250 means more time spent at the fuel station, as it only returns 37.2mpg. It’s CO2 emissions are also higher at 172g/km.

The diesel versions obviously perform better than their petrol counterparts in terms of economy - the 200 d achieves 52.3mpg, while the four-wheel-drive variant delivers a best of 50.4mpg. The 220 d is still reasonably competitive with a maximum of 49.6mpg, and CO2 emissions range from 140g/km to 151g/km.

Insurance groups

The entry-level GLA 180 Sport is in insurance group 27, so premiums are going to be on the high side. The 250 petrol variant is in group 36, while the Mercedes-AMG cars occupy groups 41 to 44.

Equally, there’ll be no insurance bargains if you opt for an oil-burner, with the base 200 d Sport in group 31. The top-spec 220 d AMG Line Premium Plus sits in group 37.

Depreciation

You’d expect sound residual values from a premium manufacturer such as Mercedes, and the GLA performs reasonably well. Over an average ownership period of three-years and 36,000 miles, the GLA holds onto around 50% of its original value. However, the Volvo XC40 fares slightly better, with 55% of its list price retained over the same period.

Which Is Best

Cheapest

  • Name
    GLA 180 Urban Edition 5dr
  • Gearbox type
    Manual
  • Price
    £24,775

Most Economical

  • Name
    GLA 200d Sport 5dr Auto
  • Gearbox type
    Semi-auto
  • Price
    £32,775

Fastest

  • Name
    GLA 250 4Matic AMG Line Edition 5dr Auto
  • Gearbox type
    Semi-auto
  • Price
    £34,585

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