the AMG version as detailed in our launch drive. In brief though these included a power bump from 360hp and 332lb ft to 381hp and 350lb ft, shorter gearing and an optional Dynamic Plus package. This latter feature is the most interesting, bundling two-stage adaptive dampers with a mechanical limited-slip differential on the front axle to complement the existing Haldex-style four-wheel drive system.
All we needed were some suitably bumpy and greasy roads to put these new features to the test, not something one would usually struggle to find in the middle of the Pennines. The rain never came and the tarmac remained resolutely dry and grippy; if we wouldn't be getting the best from the diff we'd at least get to put the damping through its paces.
More of the same
Previous experience of the pre-facelift A45 on these very roads indicated a superficially fierce low-speed ride that'd have more consumer-minded road testers digging into their bag of cliches for 'rattled fillings' and 'chiropractor fees' complaints. Here at PH we're made of sterner stuff though. And pushed harder the A45's original set-up showed real class, the fierce compressions and mid-corner lumps on these roads swallowed without fuss and letting the fearsome turbocharged thrust of that 2.0-litre engine and the four-wheel drive traction really prove their worth. We've said it before but AMG's first hot-hatch is no half-hearted effort - new to the genre or not, the A45's sheer ferocity successfully makes good on that premium over a Golf R and is more intense than the RS3's torque-rich power delivery from its more charismatic five-cylinder motor.
The seven-speed dual-clutch has satisfyingly chunky metal paddles if you want to take control yourself but, even in manual mode, has some annoying quirks. Chief among them is a habit of dropping two or three ratios when you only needed one, an overly dramatic block downshift from fourth to first on one occasion a typical example. It's a common feature of all AMG transmissions from GT down and no less annoying for it - one tug on the paddle should mean one gear down, and the inconsistency of the response as it tries to second guess your motives can result in an ugly battle between man and machine just when you don't want it.
Other niggles include the duplicated rotary dials buried down low in the centre console; the one behind the gear selector controls the driver modes while the one behind that is your main interface with the infotainment, meaning it's easy to select Race mode (additional with the Dynamic Plus pack) when you were meaning to phone home while sat in traffic. Or switch radio stations when you wanted maximum attack mode for an enticing section of moorland road. A tiny boot and yawning quality gap between standard A-Class switchgear and pimped up AMG-level trim also irritate, the latter a dropped ball against Audi that Mercedes can't really afford at this price point.
Little details but the linear steering rack AMG insists on over standard A-Classes gives the wheel weight and bite rare in this day and age. This informs much about the handling balance too, which in the Renaultsport style is all about a very positive front end and options beyond that point. It's still a nose-heavy, hatch-based car but the A45 has been set up to reward an assertive, confident driver with an aggressive driving style ready to exploit the traction of its four-wheel drive powertrain.
Obviously the addition of a diff at the front puts more emphasis on the front axle, any drive from the rear subtle in its contribution, at least on these dry roads. You get the impression it'll be just as confidence inspiring when the going gets slippery too, the all-weather cred an important part of the A45's sell over conventional hot hatches. Let's be realistic though; it may have the power of an Evo, but don't expect it to dance like one on the limit.
And this is about the only softening of the A45's otherwise rabid character. The looks still won't be too tastes but in the (expensive) matt grey paint and without the excesses of the optional aero package it pretty much lives up to the premium billing. And if you don't like the hatch the extra power and chassis options carry over to the CLA, Shooting Brake and GLA variants too.
Engine: 1,991cc, 4-cyl turbocharged
Transmission: 7-speed dual clutch, all-wheel drive
Power (hp): 381@6,000rpm
Torque (lb ft): 350@2,250rpm
Top speed: 155mph (limited)
MPG: 40.9 (claimed)
Price: £40,695 (£51,470 as tested, comprising AMG Dynamic Plus pack with front limited-slip differential and two-stage adaptive dampers £1,395; AMG Night Package with 19-inch black wheels, privacy glass and black trim £1,595; AMG Performance Exhaust with manual override £510; Premium Package with power-adjustable front seats, Harman Kardon surround sound, Keyless-Go and panoramic sunroof £1,895; AMG Exclusive Package including Red Cut leather and contrast stitching £895; Driving Assistance Package £1,695; Comand Online infotainment £995 and Designo Magno Mountain Grey paint £1,795)