Engineering:Mercedes-Benz A-Class (W177)

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Short description: German small car (from 2018)
Mercedes-Benz A-Class (W177)
Mercedes-Benz A 180 Progressive (W 177) – f 16032019.jpg
Mercedes-Benz A 180 Progressive
Overview
ManufacturerMercedes-Benz
ProductionApril 2018 – present
Model years2018–present
2019–2022 (North America)[1]
Assembly
DesignerMark Fetherston[7]
Body and chassis
ClassSubcompact executive car (C)
Body style
Layout
  • Front-engine, front-wheel-drive
  • Front-engine, all-wheel-drive (4Matic)
PlatformMercedes-Benz MFA2
Related
  • Mercedes-Benz GLA (H247)
  • Mercedes-Benz GLB (X247)
  • Mercedes-Benz CLA (C118)
  • Mercedes-Benz B-Class (W247)
Powertrain
Engine
Transmission
Hybrid drivetrain
Battery15.6 kWh lithium-ion (Plug-in hybrid)
Dimensions
Wheelbase
  • 2,729 mm (107.4 in)
  • 2,789 mm (109.8 in) (LWB sedan)
Length
  • 4,419 mm (174.0 in) (hatchback)
  • 4,549 mm (179.1 in) (sedan)
  • 4,622 mm (182.0 in) (LWB sedan)
Width1,796 mm (70.7 in)
Height
  • 1,440 mm (56.7 in) (hatchback)
  • 1,454 mm (57.2 in) (sedan)
uk|uk|Kerb|Curb}} weight
  • 1,300–1,445 kg (2,866–3,186 lb)
  • 1,680 kg (3,704 lb) (Plug-in Hybrid)
Chronology
PredecessorMercedes-Benz A-Class (W176)

The Mercedes-Benz A-Class (W177) is the fourth and current generation of the A-Class range of subcompact executive hatchbacks and sedans. It was launched in 2018 as the successor to the W176 A-Class, with sales commencing in March 2018.[8] The available body styles include:

  • 5-door hatchback (W177 model code)[9]
  • 4-door sedan (V177 model code)[10]
  • 4-door long wheelbase sedan (Z177, only sold in China)[11]

Development and launch

The W177 A-Class hatchback officially debuted at the 2018 Geneva Motor Show.[12] It is based on the front-wheel drive MFA2 (Modular Front Architecture) platform and features front MacPherson struts, and rear torsion beam suspension, though some models are equipped with multi-link rear suspension.[13]

In mid-2020, the production of the North American-market A-Class sedan returned to Rastatt, Germany from the COMPAS plant in Aguascalientes, Mexico to increase the production capacity of the GLB.[14]

The vehicle received a facelift for the 2023 model year.[15]

Sedan (V177, Z177)

A 4-door sedan model was released in late 2018.[16] The A-Class sedan is sold alongside the A-Class hatchback in Europe, while it marks the first time the A-Class is offered in North America but as a sedan only in the US and as both a hatchback and sedan in Canada,[17][18] while in Mexico it's the first time the sedan is sold, as the hatchback has been marketed for the first and third generation before.

It is based on the Mercedes-Benz Concept A Sedan revealed at the 2017 Shanghai Motor Show and came in response to demand for a more practical alternative to the Mercedes-Benz CLA.[19] A long-wheelbase sedan model (Z177) was also unveiled at the 2018 Auto China Show, featuring a 60 mm (2 in) longer wheelbase and is sold exclusively in China.[20]

At its debut Daimler claimed it had the lowest aerodynamic drag of all production vehicles in the world, with a drag area below 0.49 m2, depending on exact equipment, including aerodynamic wheel and tire combination, grille shutters, etc.

Equipment

The W177 A-Class comes as standard with 16-inch alloy wheels, cruise control, keyless ignition, and LED daytime running lights.[21]

All models feature the new Mercedes-Benz User Experience (MBUX) infotainment system with a redesigned touch interface and voice-controlled smart assistant that is activated by saying "Hey Mercedes".[22] MBUX also contains what3words functionality as standard. It is also able to offer quick shortcuts to menus based on the past habits of the user.[23] The system is also optionally available with an augmented reality navigation system that records and displays directional arrows on the road in the navigation system.[24]

Standard models feature two 7-inch displays for the instrument cluster and MBUX screen, and can be upgraded to a 10.25-inch display with touchpad controls,[25] real-time traffic information, and traffic sign recognition.[26] Other available options include Apple CarPlay and Android Auto,[27] ambient lighting, a head-up display,[28] and the use of a smartphone to lock or unlock the car via NFC.[29]

Mercedes-AMG A 35 4MATIC+, A 45 4MATIC+, and A 45 S 4MATIC+

The A 35 4MATIC+ model was unveiled at the 2018 Paris Motor Show.[30] It uses an all-wheel drive layout and has a 7-speed dual clutch AMG SpeedShift DCT transmission.[31]

On 2 January 2019, the automobile insurance company, HUK24, accidentally revealed the information about new A 45 4MATIC+ and A 45 S 4MATIC+ AMG in its website.[32] The engine is heavily revised M133 and renamed M139 with higher compression ratio (9.0:1 versus 8.6:1 for M133 engine) and a twin-scroll turbocharger situated behind the engine for better air flow management. There are two power levels: A 45 4MATIC+ with 285 kW (382 hp) and 480 N⋅m (354 lb⋅ft) and A 45 S 4MATIC+ with 310 kW (416 hp) and 500 N⋅m (369 lb⋅ft).[33] At 416 hp (422 PS), the M139 engine fitted to A 45 S is the second most powerful series production four-cylinder engine with specific output of 208 hp (211 PS) per litre (or 104 hp per cylinder).[34][35]

The Mercedes-Benz A35 arrived in North America as the 2020 model, though it was only available as a sedan variant in the US, while Canada and Mexico received both the hatchback and sedan models of the A35.[36][37] In addition, Mexico also got the A45 4MATIC+ and A45 S 4MATIC+ hatchbacks.

2023 facelift

The A-Class received a facelift, unveiled in late 2022 for the 2023 model year. Notable enhancements include updated headlights and taillights. While the engines remain unchanged, petrol models now incorporate a 48-volt mild hybrid system. Furthermore, the 2023 A-Class features a redesigned interior and an upgraded infotainment screen, housing the latest iteration of the Mercedes-Benz MBUX system. Finally, the manual transmission was retired, along with the other two remaining manual models (the B-Class and CLA).[38]

Technical details

Engines

Model Years Configuration Displacement Power Torque 0–100 km/h (0–62 mph) Top Speed Fuel Consumption/Efficiency
(EU-Norm combined)
Petrol engines
A 160 07/2018– I4 turbo (M282 DE14 LA) 1,332 cc 80 kW (109 PS; 107 hp) at 5,000 rpm 180 N⋅m (133 lbf⋅ft) at 1,375 rpm 10.9 seconds 200 km/h (124 mph) 5.0 L/100 km (47 mpg‑US)
A 180 07/2018– I4 turbo (M282 DE14 LA) 1,332 cc 100 kW (136 PS; 134 hp) at 5,000 rpm 200 N⋅m (148 lbf⋅ft) at 1,460 rpm 9.2 seconds 210 km/h (130 mph) 5.0 L/100 km (47 mpg‑US)
A 200 05/2018– I4 turbo (M282 DE14 LA) 1,332 cc 120 kW (163 PS; 161 hp) at 5,500 rpm 250 N⋅m (184 lbf⋅ft) at 1,620 rpm 8.0 seconds 230 km/h (143 mph) 5.0 L/100 km (47 mpg‑US)
A 220 07/2018– I4 turbo (M260 DE20 LA) 1,991 cc 140 kW (190 PS; 188 hp) at 5,500 rpm 300 N⋅m (221 lbf⋅ft) at 1,800–4,000 rpm 6.9 seconds 240 km/h (149 mph) 6.2–6.4 L/100 km (38–37 mpg‑US)
A 220 4MATIC 07/2018– I4 turbo (M260 DE20 LA) 1,991 cc 140 kW (190 PS; 188 hp) at 5,500 rpm 300 N⋅m (221 lbf⋅ft) at 1,800–4,000 rpm 6.9 seconds 235 km/h (146 mph) 6.5–6–6 L/100 km (36–39–39 mpg‑US)
A 250 05/2018– I4 turbo (M260 DE20 LA) 1,991 cc 165 kW (224 PS; 221 hp) at 5,500 rpm 350 N⋅m (258 lbf⋅ft) at 1,800–4,000 rpm 6.2 seconds 250 km/h (155 mph) 6.2–6.5 L/100 km (38–36 mpg‑US)
A 250 4MATIC 07/2018– I4 turbo (M260 DE20 LA) 1,991 cc 165 kW (224 PS; 221 hp) at 5,500 rpm 350 N⋅m (258 lbf⋅ft) at 1,800–4,000 rpm 6.2 seconds 250 km/h (155 mph) 6.5–6.6 L/100 km (36–36 mpg‑US)
A 35 AMG 4MATIC 12/2018– I4 turbo (M260 DE20 LA) 1,991 cc 225 kW (306 PS; 302 hp) at 5,800-6,100 rpm 400 N⋅m (295 lbf⋅ft) at 3,000–4,000 rpm 4.7 seconds 250 km/h (155 mph) 7.3–7.4 L/100 km (32–32 mpg‑US)
A 45 AMG 4MATIC+ 2020– I4 twin-scroll turbo (M139) 1,991 cc 285 kW (387 PS; 382 hp) at 5,800–6,100 rpm 480 N⋅m (354 lbf⋅ft) at 3,000–4,000 rpm 4.0 seconds 250 km/h (155 mph) TBA
A 45 S AMG 4MATIC+ 2020– I4 twin-scroll turbo (M139) 1,991 cc 310 kW (421 PS; 416 hp) at 5,800–6,100 rpm 500 N⋅m (369 lbf⋅ft) at 3,000–4,000 rpm 3.9 seconds 270 km/h (168 mph) 8.3–8.4 L/100 km (28–28 mpg‑US)
Diesel engines
A 180 d 05/2018–12/2020 I4 turbo (OM 608 DE 15 SCR) 1,461 cc 85 kW (116 PS; 114 hp) at 4,000 rpm 260 N⋅m (192 lbf⋅ft) at 1,750-2,750 rpm 10.6 seconds 202 km/h (126 mph) 4.1–4.3 L/100 km (57–55 mpg‑US)
A 200 d 11/2018– I4 turbo (OM 654 DE 20 SCR) 1,950 cc 110 kW (150 PS; 148 hp) at 4,500 rpm 320 N⋅m (236 lbf⋅ft) at 1,400-3,200 rpm 8.1 seconds 220 km/h (137 mph) 4.0–4.3 L/100 km (59–55 mpg‑US)
A 220 d 11/2018– I4 turbo (OM 654 DE 20 SCR) 1,950 cc 140 kW (190 PS; 188 hp) at 4,500 rpm 400 N⋅m (295 lbf⋅ft) at 1,600-2,600 rpm 7.0 seconds 235 km/h (146 mph) 4.3–4.5 L/100 km (55–52 mpg‑US)
Plug-in hybrid engines
A 250 e 08/2019– I4 turbo (M282 DE14 LA) 1,332 cc 116 kW (158 PS; 156 bhp) (Engine)
75 kW (102 PS; 101 bhp) (Electric)
160 kW (218 PS; 215 bhp) (Combined)
250 N⋅m (184 lbf⋅ft) (Engine)
300 N⋅m (221 lbf⋅ft) (Electric)
450 N⋅m (332 lbf⋅ft) (Combined)
6.6 seconds 235 km/h (146 mph) 1.4–1.5 L/100 km (170–160 mpg‑US)

Transmissions

Model Years Types
Petrol engines
A 160 07/2018–present 6-speed manual
A 180 07/2018–present 6-speed manual, 7-speed automatic 7G-DCT
A 200 05/2018–present 6-speed manual, 7-speed automatic 7G-DCT
A 220 07/2018–present 7-speed automatic 7G-DCT
A 220 4MATIC 07/2018–present 7-speed automatic 7G-DCT
A 250 05/2018–present 7-speed automatic 7G-DCT
A 250 4MATIC 07/2018–present 7-speed automatic 7G-DCT
A 35 AMG 12/2018–present 7-speed automatic AMG SPEEDSHIFT DCT 7G
A 45 AMG 2020–present 8-speed automatic AMG SPEEDSHIFT DCT 8G
A 45 S AMG 2020–present 8-speed automatic AMG SPEEDSHIFT DCT 8G
Diesel engines
A 160 d 05/2019–present 6-speed manual
A 180 d 05/2018–12/2020 6-speed manual, 7-speed automatic 7G-DCT
A 180 d 12/2020–present 6-speed manual, 8-speed automatic 8G-DCT
A 200 d 11/2018–present 8-speed automatic 8G-DCT
A 220 d 11/2018–present 8-speed automatic 8G-DCT
Plug-in hybrid engines
A 250 e 05/2018–present 8-speed automatic 8F-DCT

Safety

The 2018 A-Class scored five stars overall in its Euro NCAP test.[39]

Euro NCAP test results
Mercedes-Benz A180d, LHD (2018)
Test Points %
Overall: 5 /5 stars
Adult occupant: 36.5 96%
Child occupant: 45.0 91%
Pedestrian: 44.2 92%
Safety assist: 9.8 75%

Awards

  • 2018 AA Driven New Zealand 'Car of the Year'[40]
  • 2019 What Car? 'Safety Award'[41]
  • 2019 AutoTrader South African 'Car of the Year'[42]
  • 2019 CarBuyer 'Best Small Luxury Car'[43]

References

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External links