MERCEDES-BENZ

MERCEDES-BENZ A CLASS AMG HATCHBACK A45 S 4Matic+ 5dr Auto

Fuel

FuelPetrol

Transmission

TransmissionAutomatic

Acceleration

0 - 62 mph3.9s

WLTP - CO2 (g/km)

WLTP - CO2204 g/km

With all-wheel drive and a massive 421hp punch, the Mercedes-AMG A 45 S 4MATIC+ is the giant killer that followers of Mercedes-Benz have been waiting for. If you want a devastatingly quick hatchback that can do it all, this is where you should start your search. What's not to like? The price? Well you can't have everything....

45 & COUNTING

The stats of this Mercedes-AMG A 45 S 4MATIC+ hot hatch are mind blowing when you stack them up. But could you really justify this car? Jonathan Crouch takes a look.

Ten Second Review

With all-wheel drive and a massive 421hp punch, the Mercedes-AMG A 45 S 4MATIC+ is the giant killer that followers of Mercedes-Benz have been waiting for. If you want a devastatingly quick hatchback that can do it all, this is where you should start your search. What's not to like? The price? Well you can't have everything....

Background

Just how far can you take a hot hatch? In terms of price? Performance? Traction? Quality? It's an interesting question - and here perhaps is the answer, the Mercedes-AMG A 45 S 4MATIC+. The Three-Pointed Star entered the hot hatch segment in 2013 with its 360hp 4WD first generation A 45 model, a car with more power than any shopping rocket had previously ever offered. But straight line speed isn't everything in a model of this sort and it was soon clear that this pricey contender lacked the finesse of super-GTi rivals like Honda's Civic Type-R and Ford's Focus RS, even when the AMG brand updated the car with a 381hp powerplant in 2015. That power output was trumped two years later by the 400hp powerplant shoe-horned into the Audi RS 3: the A 45 was out-gunned. So the engineers from Affalterbach have tried again with this second generation A 45, offered in our market only in 421hp 'S' form. There's never been a Mercedes quite like this one. Let's take a look.

Driving Experience

There's only one engine on offer for UK A 45 buyers but it's quite a powerplant. A 2.0-litre four-cylinder unit might not immediately promise great fireworks, but this one comprehensively trumps the 400hp 2.5-litre lump in the Audi RS 3. You get a hefty 421hp from a relatively lightweight hand-built twin-scroll turbo engine (which is 40hp than the equivalent version of the previous generation model). That's in '45 S' version form, the only variant of this car offered in our market. Mercedes claims this car's engine to be the most powerful series-production four-cylinder turbo powerplant in the world and although you might well remember the odd Mitsubishi Evo with a few more ponies under the bonnet, for the time being at least it's impossible to argue with Mercedes' claim. This engine develops 500Nm of torque from just 2,250rpm (up from 475Nm before), again incrementally better than the RS 3 Audi can manage. 62mph from rest takes 3.9s en route to 168mph. Drive naturally goes to all four wheels and you get an AMG SPEEDSHIFT DCT 8-speed dual clutch sports transmission which has a RACE-START function and various AMG DYNAMIC SELECT driving modes enhanced by AMG DYNAMICS integrated agility control. Traction through the bends is enhanced by AMG Performance 4MATIC+ all-wheel drive with AMG TORQUE CONTROL. Plus there's bespoke AMG suspension with adaptive damping based around the three modes of AMG RIDE CONTROL. There's also a high performance braking system and circuit fiends can play with an AMG TRACK PACE app.

Design and Build

Unlike with the lesser A 35 model, you don't have to spend a fortune on add-on exterior bits for this A 45 model to look properly menacing. The imposing presence is accentuated by the wider front wings with flared wheel arches shrouding big 19-inch AMG wheels and there's an AMG-specific radiator grille with a wider lower contour and twelve vertical louvres. The front apron features a jet-wing design, while horizontal fins in the outer air inlets and the stretched lower air inlet emphasise the impression of width. At the same time, the pronounced "shark nose", the slim, deeply contoured headlamps and the flat, aerodynamically favourable bonnet with powerdomes visually lower the front section to create the impression of extremely dynamic forward thrust. Inside, there are contoured sport seats with firm lateral support, double topstitching in red and red designo seat belts, plus AMG carbon fibre-look trim elements in the dashboard support. Yellow trimming highlights distinguish the status of this S-Model and there's an AMG Performance steering wheel in nappa leather and DINAMICA microfibre with contrasting yellow topstitching. Otherwise, it's the standard A-Class recipe, with twin front fascia screen and an advanced MBUX infotainment system. There's reasonable rear passenger space on a sliding rear bench - and a practical 370-litre boot.

Market and Model

Expect to pay around the £50,000 mark for this 421hp A 45 S 4MATIC+ - or more if you want to allow for some well chosen extras. There's also a better equipped 'Plus' variant available for £6,000 more. Either way, that's about £14,000 more than you'd pay for an equivalent version of the next hot hatch down in the 306hp A 35 4MATIC model. If you want a sleeker shape with this A 45 model's same powertrain and engineering, then that's available for around £1,500 more with the CLA 45 S 4MATIC+ model; and if you can stretch to around £53,500, there's a bit of extra stylish practicality in the shape of the CLA 45 S Shooting Brake 4MATIC+ estate. You do at least get plenty for your not-inconsiderable outlay. Aside from everything we've so far mentioned, there are three bespoke AMG display styles ("Classic", "Sport" and "Supersport") for the instrument cluster. The "Supersport" mode is particularly striking with a central, round rev counter and additional information presented in the form of bars to the left and right of the rev counter: with a three-dimensional perspective, they reach far into the background to an artificial horizon. We also love the standard AMG exhaust system. Depending on the choice of drive program, its sound signature ranges from harmonious and discreet (in the programs Slippery, Comfort and Sport) to emotive and sporty (in Sport+ and RACE). The sound characteristics are controlled by an exhaust gas flap, depending on engine speed and load. AMG Real Performance Sound is available as an option. Many buyers will want to upgrade to the larger optional 20-inch AMG Performance light-alloy wheel rims and the DTM-style winged AMG Performance front seats.

Cost of Ownership

The emissions figure of the A 45 S 4MATIC+ (192g/km WLTP) seems scarcely credible given that this is a 421hp super hatch that hits 62 in less than four seconds. To really put that figure into perspective, we'll tell you that it's virtually the same as the lightweight Toyota GT86 sports coupe; a car with no all-wheel drive, no usable rear seats, no turbocharger and which develops less than half the torque of the A 45 AMG. That's quite jaw-slackening. Equally impressive, given the performance on offer here, is the WLTP combined cycle fuel economy figure (33.6mpg) Mercedes is quite upfront about how it's making those numbers. The combination of multiple fuel injection and multiple spark ignition improves fuel economy and significantly increases the thermodynamic efficiency, leading to low exhaust emissions. The injection system's outstanding flexibility also ensures a high degree of freedom in terms of application. There are up to five injections per combustion cycle in the cold-start and warm-up phase, which is so crucial for emissions. Residual values are bound to be sturdy, as the GLA and CLA versions of this model have already proved. The promise of a hot Mercedes shopping rocket with low running costs and high build values isn't going to be lost on used buyers.

Summary

In the real world, this is probably the fastest car that Mercedes' AMG division has ever made. At launch, it was certainly the fastest hot hatch ever made. And the best? That'll depend upon your performance priorities. There may be more rewarding shopping rockets but there aren't any more effective ones. This is automotive evolution happening right before our eyes, the distillation of everything Mercedes knows about performance cars into one small, perfectly formed package. It's all there. The hand-built AMG engine. The manic all-weather performance. The class-leading safety. The uniquely up-market interior. When it all comes down to it, you might think it debateable whether this A 45 really offers anything much more over, say, a far more affordable 306hp A 35 AMG 4MATIC model, other than being slightly quicker to 62mph. But if you have the funds, you've been waiting for the ultimate AMG hatch and you've been wondering what the Mercedes of small performance cars might be like, questions like that won't matter. For customers seduced by that prospect, this A 45 provides a devastatingly effective statement of intent. Worth the wait? You bet.

  • Rear wiper
  • Privacy glass
  • 4 Electric Front and Rear windows
  • Heated glass rear windscreen + timer control
  • Rain sensing windscreen wipers with two sensitivity settings

  • 3 stage electronic stability programme
  • AMG high performance brake system with red painted brake callipers and black AMG lettering at the front, ventilated and perforated brake discs
  • Active brake assist includes forward collision warning system with autonomous braking
  • Adaptive brake assist with hold function and hill start assist
  • ESP curve dynamic assist
  • Anti lock brake system with Brake Assist
  • Electronic Stability Program with Anti Skid Control
  • Electronic parking brake

  • AMG floor mats

  • AMG suspension including AMG specific axles and sporty spring/damper setup

  • Hey Mercedes Voice activation
  • Preinstallation for Mercedes Benz link
  • Dual bluetooth interfaces
  • Wireless charging
  • Hard-disk navigation

  • Direct steering
  • Attention assist
  • Cruise control + speed limiter
  • 180 degree rear view camera with parking guidelines
  • AMG DYNAMIC SELECT with driving programs (Slippery, Comfort, Sport, Sport+, Individual and Race) including drift mode via steering wheel shift paddles
  • AMG speed sensitive steering with two sets of steering characteristics
  • Ultrasonic sensors positioned in the front and rear bumpers
  • Mercedes me remote services
  • Active parking assist with visual and audible warning of detected obstacles

  • Car wash mode
  • ECO start/stop function

  • 10.25" Digital instrument cluster display screen
  • BUX multimedia system with DAB digital radio and touchpad including satellite navigation
  • MBUX augmented reality for navigation
  • Pre-installation for car sharing
  • 10.25 inch touchscreen media display with AMG specific, AMG start up logo, visualisation of the AMG drive programs, vehicle and engine data
  • Owners manual in English
  • Service indicator (Active Service System)
  • Brake pad wear indicator warning light
  • Outside temperature gauge
  • Trip computer
  • Smartphone integration with Apple CarPlay and Android auto
  • AMG track pace
  • Fluid level warning indicator for fuel, oil, coolant and washer fluid
  • Lamp failure indicator
  • Mercedes me connect including emergency call system, accident recovery, breakdown management and maintenance

  • Electric adjustable and heated door mirrors with integrated LED side indicators

  • Light aluminium with longitudinal grain interior trim

  • 10 speakers
  • DAB Digital radio
  • 2 USB ports (type C) in rear stowage compartment and one in front of center console
  • Mercedes-Benz advanced sound system - 225W

  • AMG A45 S bodystyling -rear apron, four vertical fins, side sill panels, roof spoiler lip, specific front apron, diffuser look and S label on boot lid
  • AMG bodystyling - Front apron with splitter in chrome, rear apron with chrome trim and chrome visible trim elements in tailpipe
  • Radio aerial
  • Window line trim strip in high gloss black
  • AMG real performance exhaust sound system
  • AMG specific radiator grille in high gloss chrome with AMG lettering
  • Valve control dependent on drive program
  • Two round twin tailpipe trim elements each measuring 90 mm in diameter and AMG lettering plus ribbing on the inside of the pipe
  • Wider wheel arches for AMG wheels
  • Body colour side skirt
  • Body colour door handles
  • Body colour bumpers
  • High gloss black beltline
  • Black weather strip

  • Headlamp assist automatic headlamp activation
  • LED high performance headlamps with integrated LED daytime running lights
  • LED tail lamp
  • Rear fog lights
  • LED third brake light
  • Adaptive brake lights

  • Two zone thermotronic luxury automatic climate control
  • Black air vents with surround in silver chrome

  • AMG sporty centre console with raised front section and integral control switched for manual transmission mode
  • 3 Spoke flattened lower section sporty design AMG Performance steering wheel in nappa leather/Dinamic microfibre
  • AMG Steering wheel touch control buttons
  • Stowage compartment in centre console with retractable cover
  • Silver coloured aluminium gear shift paddles on steering wheel
  • Touchpad on center console
  • Illuminated front door sills with changeable cover
  • Interior mirror with reading lamps in black and frameless
  • AMG brushed stainless steel sports pedals with rubber studs
  • Twin front cupholders
  • Black roof lining
  • Rear armrest with 2 cupholders
  • Front centre armrest with storage compartment
  • Height/reach adjustable steering column

  • Interior lighting - 64 colour Ambient lighting

  • Light and sight pack - A Class
  • Mirror package - A Class
  • Seat comfort pack - A Class
  • AMG night pack - A Class
  • AMG Driver's pack - A Class
  • AMG performance seat pack - A Class

  • Bonnet with power domes
  • Black seatbelts
  • Window airbags
  • 3 rear 3 point seatbelts
  • Drivers knee airbag
  • Warning triangle and first aid kit
  • Dual stage Driver/Passenger Airbags
  • Tyre pressure monitoring system
  • Childproof locks manually operated for rear doors and electrically operated for rear power windows
  • Active bonnet
  • Front and rear seatbelt reminder
  • Crash responsive emergency lighting
  • Driver and passenger head and side airbags

  • Front seat cushion length adjustment
  • AMG performance seats
  • 40:20:40 split folding rear seats
  • Auto Mercedes-Benz child seat recognition sensor
  • Heated front seats
  • Rear head restraints
  • Front head restraints
  • Seat occupancy sensor for front passenger seat
  • ISOFIX and top tether child seat fixing points in two outer rear seats

  • Urban guard vehicle protection system with immobiliser and interior protection
  • Keyless Go
  • Keyless entry lock/unlock
  • Alarm system/interior protection/immobiliser
  • Remote central locking and crash sensor with emergency opening function

  • Rear axle multi-link
  • AMG performance 4MATIC+ with torque control

  • Sunvisors with illuminated vanity mirrors

  • Summer tyres
  • Wheel arches with flared AMG wings with TURBO 4MATIC+ lettering

  • 19" AMG 5 twin spoke light alloy wheels

  • Tirefit sealant kit

  • Noise Level dB(A): 70
  • CO: 0.177
  • HC: 0.016
  • NOx: 0.021
  • HC+NOx: N
  • Particles: 0.0007
  • WLTP - CO2 (g/km) - Comb: 204
  • CO2 (g/km): 192
  • Standard Euro Emissions: EURO 6

  • Cylinders: 4
  • Cylinder Layout: IN-LINE
  • Number of Valves: 16
  • Camshaft: DOHC
  • Fuel Delivery: TURBO DIRECT INJECTION
  • Catalytic Convertor: True
  • Engine Layout: FRONT TRANSVERSE
  • Compression Ratio: 9.0:1
  • Transmission: SEMI-AUTO
  • Gears: 8 SPEED
  • Cylinders - Bore (mm): 83
  • Cylinders - Stroke (mm): 92
  • CC: 1991

  • EC Directive 1999/100/EC Applies: False
  • EC Urban (mpg): 26.9
  • EC Extra Urban (mpg): 39.2
  • EC Combined (mpg): 33.6
  • WLTP - MPG - Low: 21.2
  • WLTP - MPG - Medium: 31.7
  • WLTP - MPG - High: 36.7
  • WLTP - MPG - Extra High: 33.2
  • WLTP - MPG - Comb: 31.4
  • WLTP - FC (l/100km) - Low: 13.3
  • WLTP - FC (l/100km) - Medium: 8.9
  • WLTP - FC (l/100km) - High: 7.7
  • WLTP - FC (l/100km) - Extra High: 8.5
  • WLTP - FC (l/100km) - Comb: 9

  • Generation Mark: 3
  • Alternative Fuel Qualifying: False
  • Did at least one aspect of this vehicle's safety give cause for concern?: False
  • Special Edition: False
  • Special Order: False
  • Based On ID: N
  • Insurance Group 1 - 50 Effective January 07: 40E
  • Service Interval Mileage: 12500
  • Service Interval Frequency - Months: 12
  • NCAP Adult Occupant Protection %: 96
  • NCAP Child Occupant Protection %: 91
  • NCAP Pedestrian Protection %: 92
  • NCAP Safety Assist %: 75
  • NCAP Overall Rating - Effective February 09: 5
  • Badge Power: 421
  • Badge Engine CC: 2.0
  • Vehicle Homologation Class: M1
  • Coin Series: S
  • Coin Description: 4Matic+
  • Standard manufacturers warranty - Years: 3
  • Standard manufacturers warranty - Mileage: 999999
  • Manufacturers Paintwork Guarantee - Years: 3
  • Manufacturers Corrosion Perforation Guarantee - Years: 30

  • Engine Power - KW: 310
  • Engine Power - RPM: 6750
  • Engine Torque - LBS.FT: 369
  • Engine Torque - NM: 500
  • Engine Torque - RPM: 5000
  • Engine Power - BHP: 421
  • Engine Power - PS: True
  • 0 to 60 mph (secs): False
  • 0 to 62 mph (secs): 3.9
  • Top Speed: 168
  • Engine Torque - MKG: 51

  • Emissions Test Cycle: WLTP
  • RDE Certification Level: RDE 2

  • Alloys?: True
  • Space Saver?: False
  • Tyre Size Rear: 245/35 R19
  • Tyre Size Spare: TYRE REPAIR KIT
  • Wheel Type: 19" ALLOY
  • Tyre Size Front: 245/35 R19
  • Wheel Style: AMG 5 TWIN SPOKE

  • Width (including mirrors): 1992
  • Height: 1412
  • Height (including roof rails): N
  • Length: 4445
  • Width: 1850
  • Wheelbase: 2729

  • Minimum Kerbweight: 1660
  • Gross Vehicle Weight: 2130
  • Fuel Tank Capacity (Litres): 51
  • Luggage Capacity (Seats Up): 370
  • No. of Seats: 5
  • Max. Towing Weight - Braked: 1500
  • Max. Towing Weight - Unbraked: 750
  • Max. Loading Weight: 470
  • Max. Roof Load: 100
  • Luggage Capacity (Seats Down): 1210
  • Turning Circle - Kerb to Kerb: 11.54

  • Metallic paint: £595
  • Solid paint: Included
  • Special solid paint: £595
  • Designo Magno Paint: £1,795
  • Designo metallic paint: £795

  • Artico man-made leather/Microfibre Dinamica upholstery with red contrast stitching: £0
  • Artico man-made leather/Microfibre Dinamica upholstery with yellow contrast stitching: Included

  • Metallic - Digital white: £595
  • Metallic - Iridium silver: £595
  • Metallic - Mountain grey: £595
  • Metallic - Cosmos Black: £595
  • Metallic - Denim blue: £595

  • Solid - Polar white: £0

  • Designo Magno - Mountain grey: £1,795
  • Special solid - Sun yellow: £595
  • Designo metallic - Patagonia red: £795

  • Artico man-made leather/Microfibre Dinamica - Black with yellow stitching: £0
  • Artico man-made leather/Microfibre Dinamica - Black with red stitching: £0

Whilst every effort is made to verify and ensure the accuracy of the data, the information should only be used as a guide and no purchasing decision should be made without verification of the data from either the manufacturer or franchised dealer. Our offers may be on a different model year to that represented by this data and so specification may differ accordingly.

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