Parkers overall rating: 4 out of 5 4.0

Miles per pound (mpp) Miles per pound (mpp)

Reliable fuel consumption data for comparison purposes is not available for this model.

Fuel economy

A more stringent standard for fuel economy (WLTP) was introduced from September 2017, and this model was not required to undergo that test. Its fuel economy measured under the previous test system was 37 - 38 mpg. However these figures are less likely to be achievable in real world driving and so should never be compared to another car's mpg which was measured under the newer, more realistic WLTP system.

Given its performance, Mercedes GLA 45 AMG running costs are comparatively reasonable on the fuel economy front. Mercedes claims average consumption of 37.6 mpg. How close you’d get to that figure in the real world is debatable, however.

Carbon dioxide emissions are pretty tidy too, so it won’t cost the earth to tax – see below for details.

Mercedes GLA 45 AMG emissions are rated at 175g/km of CO2, which is very impressive given the performance on offer.

A stop/start system is standard and when left in Economy mode the transmission changes up fairly early to help aid efficiency.

Providing you keep the car serviced regularly, Mercedes GLA 45 AMG reliability should not be a cause for concern. Mercedes’ reputation for reliability and build quality has improved considerably in recent years.

The powerful engine is a fairly new design, so it’s a little early to tell if issues are likely at high mileages.

Ongoing running costs

Road tax (12 months) £240
See tax rates for all versions
Insurance group 40 - 44
How much is it to insure?