MPG and running costs
A 376bhp, turbocharged, all-wheel drive hot hatchback wouldn't be most peoples' first choice for an economical daily driver, but Mercedes' four-cylinder engine is commendably light on fuel, at least on paper.
Officially, the A45 AMG is capable of 40.9mpg combined, with CO2 emissions of 162g/km. This compares favourably with Mercedes' rivals - the Audi RS3 is 6mpg thirstier and emits 189g/km, while the less potent BMW M135i achieves 35.3mpg combined with CO2 of 188g/km. Naturally, hitting these figures in real-world driving will be a little more difficult, but the potential is there if required.
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The A45 AMG sits in group 41 for insurance, so that may prove expensive depending on your personal circumstances. Mercedes' three-year unlimited mileage warranty means some circumspection might be required once out of warranty, as you would with any expensively engineered vehicle. Beyond that, tyres are likely to be the only other significant cost; the standard tyres are 235/40 R18 and the optional rubber 235/35 R19.