What’s under the bonnet?
Mercedes offers the A-Class with a range of petrol and diesel engines as well as a plug-in hybrid too. Â
Starting with petrol power, the range starts with the 134bhp A180 which is a little lacklustre when it comes to performance, so we’d be more inclined to opt for the more powerful 161bhp A200, which offers the best blend of performance and economy. Both the A180 and A200 use a turbocharged1.3-litre engine.  If you want the push the performance just that little bit further, then the A250 – which gets a 221bhp 2.0-litre petrol engine is great fun and capable of doing the 0-60mph in 6.2 seconds.
If you’re looking at low running costs though, the A250e is well worth considering. It uses the same 1.3-litre petrol engine from the A200 but works with an electric motor which means it offers a grand total of 215bhp. Because it’s a plug-in hybrid it will offer a claimed 40 miles of electric charge alone. Â
Diesel-wise, there’s little reason to look beyond the 114bhp A180d as it offers a good power spread right through the rev range, which means it’s just as capable on a country lane as it is on a motorway. If you want more oomph, though, then the A200d and A250d are great options, and produce 148bhp and 187bhp respectively from their 2.0-litre engines. Â
If you want some real thrills, then try A35 AMG hot hatch, which pumps out 302bhp and 400NM of torque – meaning a 0-60mph time of under five seconds is possible and an electronically limited top speed of 155mph. Power is driven through all four wheels via a seven-speed dual-clutch automatic gearbox. A flagship A45 hot hatch is also available with a monstrous 415bhp – making it the most powerful hot hatch on sale today.
Six-speed gearboxes are supplied on A180, A180d and A200 models, with the rest coming with a seven- or eight-speed automatic transmission.
Running costs
There’s no question the diesel versions offer the best economy, with the A180d averaging around 62.8mpg and emissions of 117g/km of CO2. But the more powerful A200d or A220d versions offer similar mpg – returning 58.9mpg and 57.7mpg respectively.
Both versions of the 1.3-litre petrol in the A180 and A200 offer good fuel economy figures and emissions, averaging close to 50mpg and emissions of close around 134g/km of CO2. There’s a huge appeal to the plug-in hybrid version which promises around 256mpg and emits just 25g/km of CO2. It’s good news for business car users who’ll see big savings on company car tax.
Things to look out for
All Mercedes-Benz A-Class models come with a three-year, unlimited mileage warranty as standard, this should cover most of the costs should there be any issues over that time period.
While there are no major reliability concerns, servicing are repairs are likely to be more expensive than a mainstream manufacturer, which is something worth factoring into ownership.