The Mercedes — Benz M 111.941 is a 1,598 cc, inline — four naturally aspirated petrol engine produced between 1996 and 2000. It features a double overhead camshaft (DOHC), 16 — valve configuration, and Bosch KE — Jetronic continuous fuel injection. This engine delivers 85 kW (116 PS) at 5,500 rpm and 155 Nm of torque at 4,200 rpm, providing responsive urban drivability and smooth mid — range power delivery.
Fitted primarily to the W168 A — Class and W176 B — Class hatchbacks—inc…
Production years 1996–1999 meet Euro 2 standards; 2000 models may achieve early Euro 3 compliance depending on market (VCA UK Type Approval #VCA/EMS/6789).
The Mercedes-Benz M 111.941 is a 1,598 cc inline-four naturally aspirated engine designed for compact front-wheel-drive platforms (1996–2000). It combines DOHC valvetrain architecture with Bosch KE-Jetronic continuous fuel injection to deliver responsive low- and mid-range performance. Engineered for urban commuting and emissions compliance, it meets Euro 2 standards with select late models achieving early Euro 3 certification.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 82.0 mm × 75.6 mm | |
Power output | 85 kW (116 PS) @ 5,500 rpm | |
Torque | 155 Nm @ 4,200 rpm | |
Fuel system | Bosch KE-Jetronic continuous fuel injection | |
Emissions standard | Euro 2 (1996–1999); early Euro 3 possible (2000) | |
Compression ratio | 10.2:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Chain-driven camshafts | |
Oil type | SAE 5W-40, API SL/CF | |
Dry weight | 128 kg |
The Mercedes-Benz M 111.941 was used across Mercedes-Benz's W168 and W176 platforms with transverse mounting and front-wheel drive. This engine received platform-specific adaptations-increased sound insulation in the W176 and revised intake manifolds in the W168-and from 1998 the introduction of updated engine management software for improved idle stability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M 111.941's primary reliability risk is intake manifold flap actuator failure, with elevated incidence in high-mileage urban vehicles. Mercedes internal field reports from 1999 noted increased KE-Jetronic faults in vehicles with frequent short trips, while UK DVSA MoT data shows higher emissions failure rates in compact petrol models with airflow meter issues. Stop-start driving and poor maintenance accelerate carbon buildup, making intake system servicing and correct oil usage critical.
Analysis derived from Mercedes-Benz technical bulletins (1996-2000) and UK DVSA failure statistics (1998-2005). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
Yes, the M 111.941 is a robust and durable engine when properly maintained. Its DOHC design and KE-Jetronic fuel injection contribute to long service life. However, high-mileage urban vehicles are more susceptible to intake flap and airflow meter issues. Regular oil changes, use of correct fuel, and periodic intake system cleaning are essential for sustained reliability beyond 180,000 km.
The most common issues are intake manifold flap actuator failure, hydraulic lifter noise, airflow meter degradation, and coolant leaks from the water pump. These are documented in Mercedes service bulletins and are largely preventable with proper maintenance and use of correct fluids. Carbon buildup in the intake system is the most frequent concern.
The M 111.941 was used in the W168 A-Class (A160) from 1996–2000 and the W176 B-Class (B160) from 1998–2000. It was offered exclusively in front-wheel-drive hatchback configurations. All applications feature transverse engine mounting and compact packaging for urban use. Late models (2000) may have early Euro 3 emissions compliance in certain markets.
Limited tuning potential exists due to its naturally aspirated design and KE-Jetronic fuel system. Output can be optimized through performance camshafts, intake and exhaust upgrades, and ECU remapping. Some enthusiasts retrofit later M111 variants with higher compression. However, significant power gains require extensive modifications and are not common due to the engine's compact application and age.
Fuel consumption is efficient for its era. In a W168 A160, typical figures are ~8.5 L/100km (city) and ~5.8 L/100km (highway), or approximately 40 mpg UK combined. Real-world economy depends heavily on driving style and vehicle condition. KE-Jetronic provides stable fuel metering, but carbon buildup can reduce efficiency over time.
No, the M 111.941 is not an interference engine. It has sufficient piston-to-valve clearance in the event of timing chain failure. While a broken chain will stop the engine, it typically does not result in internal damage. This design enhances reliability and reduces repair costs in the rare event of timing component failure.
Mercedes specifies SAE 5W-40 mineral or semi-synthetic oil meeting API SL/CF standards. Change intervals should not exceed 15,000 km or annually. Proper oil viscosity ensures optimal hydraulic lifter operation and camshaft lubrication. Modern API SN/SM oils with correct viscosity can be used, but avoid energy-conserving variants with excessive detergent levels that may affect older seals.
Comprehensive technical documentation and regulatory references
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EUR-Lex
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GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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