The Mercedes — Benz M 180.941 is a 1,332 cc, inline — four petrol engine produced between 2015 and 2020. It served as the base powerplant for compact A — Class and B — Class models, featuring a transverse — mounted layout with dual overhead camshafts (DOHC) and 16 valves. In standard tune, it delivered 70 kW (95 PS), with torque output of 140 Nm, providing efficient urban performance and strong low — end response.
Fitted to the W176 A — Class and W246 B — Class, the M 180.941 was engine…
All production years 2015–2020 meet Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/5685).
The Mercedes-Benz M 180.941 is a 1,332 cc inline-four petrol engine engineered for compact applications (2015–2020). It combines transverse packaging with multi-point injection to deliver urban efficiency and responsive low-speed performance. Designed to meet Euro 6 standards, it balances city drivability with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,332 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 73.0 mm × 79.0 mm | |
Power output | 70 kW (95 PS) @ 5,300 rpm | |
Torque | 140 Nm @ 3,500–4,500 rpm | |
Fuel system | Sequential multi-point fuel injection (ME2.1) | |
Emissions standard | Euro 6 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | N/A | |
Timing system | Single-row roller chain (SOHC-style drive with DOHC cams) | |
Oil type | SAE 5W-30 MB 229.5 | |
Dry weight | 112 kg |
The Mercedes-Benz M 180.941 was used across Mercedes-Benz's W176 and W246 platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations-shortened accessory drives in the W176 and reinforced engine mounts in the W246-and from 2017 the facelifted W176 models adopted revised intake manifolds and updated engine management, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M 180.941's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in high-mileage urban use. Internal Mercedes quality reports from 2018 noted a significant number of pre-2017 engines requiring tensioner replacement before 120,000 km, while UK DVSA records indicate cooling system failures as a leading cause of overheating-related breakdowns. Extended service intervals and poor coolant maintenance increase wear and thermal stress, making fluid and oil discipline critical.
Analysis derived from Mercedes-Benz technical bulletins (2015-2020) and UK DVSA failure statistics (2017-2022). Repair procedures should follow manufacturer guidelines.
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The M 180.941 offers dependable performance but early models (2015-2017) are prone to timing chain tensioner issues if maintenance is delayed. Later units (post-2017) with redesigned tensioners and improved oil flow are significantly more durable. When maintained with correct oil (5W-30 MB 229.5) and regular coolant service, these engines can reliably exceed 150,000 km.
Primary issues include timing chain tensioner wear (especially pre-2017), cooling system failures (water pump, thermostat), oil leaks from valve cover gaskets, and ignition coil degradation. These are documented in Mercedes technical bulletins and field service reports from the late 2010s.
This 1.3L inline-four was used in entry-level models: the W176 A-Class (A 140) and W246 B-Class (B 140). Production spanned from 2015 to 2020, with minor updates in 2017 improving intake and engine management systems. It was not used in any other Mercedes or third-party vehicles.
Limited tuning potential exists. ECU remapping can yield modest gains (~5-10 kW) by optimizing fuel and ignition maps, but the naturally aspirated design limits output. Forced induction conversions are extremely complex and require extensive modifications. Most owners preserve stock tuning to maintain reliability and engine longevity.
Fuel consumption is very good by modern standards. In the W176 A 140, typical usage is ~6.5 L/100km (city) and ~4.5 L/100km (highway), or about 52 mpg UK combined. Real-world figures depend on driving style, but expect 50-55 mpg (UK) in mixed conditions. Regular unleaded (RON 95) is sufficient for optimal performance.
Yes. The M 180 series is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in severe internal damage. While chain durability is generally good, any signs of timing noise or wear should be investigated immediately to prevent catastrophic failure.
Mercedes specifies SAE 5W-30 oil meeting MB 229.5 specification. Use of high-quality synthetic oil is critical to protect the valvetrain and maintain viscosity under high thermal load. Change intervals should not exceed 15,000 km or 24 months to prevent sludge and tensioner wear, especially in early production engines.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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