[18] It featured the M270 four-cylinder petrol engine rated at 211 PS (155 kW; 208 hp), radar-based collision warning system with adaptive brake assist, and exterior design language from Mercedes-Benz's F800 concept.

[20] The brand had also announced that three initial grades would be available: the "Urban", the "Style," and the range-topping "AMG Sport", and that it would go on sale in September 2012.

[25] This number, according to news agency Reuters, is double what the VII VW Golf had received, which was released at around the same time.

[26] The official series manufacture of this model began on 17 July 2012 at the Rastatt plant, while it had become available in most countries from September of that year.

[29][30] During the production time period of the A-Class, former CEO Tim Reuss had plans to sell the third generation A-Class in Canada due to the success of the best-selling B-Class which wasn’t sold in the US and due to the recent free-trade agreement between Canada and the EU at the time, which was signed in the fall of 2016, but there weren’t any efforts to adopt the UNECE regulations, which never came into effect.

[35] The light modules and LEDs behind the headlamp cover glass were designed to create to cue called the "flare effect" for the daytime running lamps and indicators.

[37] Its drag coefficient is relatively good for the small family hatchback class, in comparison to the 8V Audi A3[38] and the F20 BMW 1 Series,[39] which both have a 0.32 figure.

Standard interior luxuries include Nappa leather trim on the steering wheel, multimedia system with a CD player, digital radio, USB input, 8.0-inch colour display, and around six speakers.

Other assistance systems include satellite navigation, Bluetooth connectivity for phone calls and audio streaming.

The model features nine airbags (standard in Australia), electronic stability control, autonomous braking, driver drowsiness detection (Attention Assist), and blind-spot alert.

The EPS featured systems consisting of: Countersteering, corrective steering, and Active Park Assist.

[5] Like the W246 B-Class which the A-Class shares its platform with, the W176 has MacPherson strut front suspension, while featuring a four-link setup at the rear.

[43] The BlueEFFICIENCY is featured on the third-generation A-Class, which is a series of measures which reduce fuel consumption and CO2 emissions.

[44] These features include: start/stop function which switches off the engine temporarily when the vehicle is stationary, alternator management for regenerative braking, and optimised tyres for rolling resistance which have low energy requirements while driving and also help to reduce fuel consumption.

[46] The SE A-Class features 16-inch alloy wheels, comfort suspension, reversing camera, a 7-inch infotainment system, Garmin satellite navigation, smartphone integration via Apple CarPlay, supportive leather seats, fabric upholstery, CD radio sound system, USB port and Bluetooth.

[49] The AMG Line and Sport models also feature upgraded brakes, 18-inch alloy wheels and an overall sporty design.

The base-level Style grade features 10-spoke 16-inch alloy wheels as standard, integral sports seats at the front, optionally made in fake leather, and contrasting topstitching and silver chrome in specific places.

The mid-level Urban level features a dual exhaust system, 17-inch, five-twin spoke light-alloy wheels, multi-function leather steering wheel as well as a leather gear shift, a different instrument cluster, and contrasting topstitching placed in specific areas.

The A 180 which is powered by a 1.6-litre M270 DE16 engine, features 17-inch five-twin spoke alloy wheels with 225/45R17 run-flat tires, six speaker sound system, six-disc CD changer, 14.7 cm (5.8 in) colour display, auxiliary USB inputs and Bluetooth audio streaming, climate control A/C, cruise control, Messancy fabric with Artico synthetic leather, front and rear parking sensors, automatic headlights, Bluetooth mobile phone connectivity, remote central locking, power windows and heated mirrors, ambient lighting and tinted windows.

[40] The range-topping A 250 Sport powered by the 2.0-litre M270 DE20, adds 18-inch five twin-spoke AMG-style wheels paired with 235/40R18 tires, Artico and Dinamica microfiber seats, perforated front brake discs, AMG sport suspension, and a panoramic power sunroof and privacy glass.

[40] The A 45 AMG is a performance version of the A-Class, fitted with a 2-litre four-cylinder turbo engine rated at 381 PS (280 kW; 376 hp) at 6000 rpm and 475 N⋅m (350 lbf⋅ft) at 2250-5000 rpm, AMG Speedshift DCT 7-speed sports transmission with Momentary M mode, 4MATIC all-wheel drive, 3-stage ESP with ESP Curve Dynamic Assist and "ESP Sport Handling" mode, AMG sports suspension with independently developed front and rear axles, high-performance braking system with 350 x 32 millimetres front brake discs and 330 x 22 millimetres rear brake discs, and is identifiable by the "twin blade" radiator grille, AMG light-alloy wheels in twin-spoke design and two square chrome-plated tailpipes.

Aesthetic changes were implemented to the headlights and taillights, designed to bring the A-Class closer in line to the W205 C-Class.

The all-wheel drive system receives a new seven-speed dual-clutch transmission with shorter ratios for third to seventh gears as well as updated technology for which AMG officials state features "improved response and shift action".

[58] The 180d (previously 180 CDI) update has notable fuel economy improvements, decreasing its combined consumption and CO2 emissions to 80.7mpg and 89g/km respectively.

[65] The unit is a three-shaft gearbox, which feature a multi-plate clutch, which allows shifting without loss of any tractive force.

The hydraulics of the mechanical parking lock are controlled electronically, allowing the transmission selector lever to be positioned on the right behind the steering wheel.

[66] For the 7-speed 7G-DCT, while running the Eco mode, the front axle receives the most torque in normal conditions, while in Sport and Manual modes, activation time to the rear axle increases, providing more torque to offer greater rear wheel dynamics.