The Mercedes — Benz M 136.920 is a 2,996 cc, V6 petrol engine produced between 1996 and 2000. It served as a mid — range powerplant for executive sedans and coupes, featuring a naturally aspirated design with dual overhead camshafts (DOHC) and 24 valves. Delivering 134 kW (182 PS) in standard tune, it provided balanced performance with smooth throttle response and linear power delivery.
Fitted to the W202 C — Class and C140 CL — Class, the M 136.920 was engineered for refined da…
All production years 1996–2000 meet Euro 2 emissions standards; select export models (1999–2000) comply with Euro 3 .
The Mercedes-Benz M 136.920 is a 2,996 cc V6 petrol engine engineered for executive applications (1996–2000). It combines naturally aspirated breathing with sequential fuel injection to deliver balanced performance and refinement. Designed to meet Euro 2 standards, it balances urban drivability with highway efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,996 cc | |
Fuel type | Petrol | |
Configuration | 60° V6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 89.9 mm × 79.0 mm | |
Power output | 134 kW (182 PS) @ 5,500 rpm | |
Torque | 270 Nm @ 4,200 rpm | |
Fuel system | Sequential multi-point fuel injection (ME2.1) | |
Emissions standard | Euro 2 (Euro 3 for select export models) | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | N/A | |
Timing system | Double-row roller chain (SOHC-style drive with DOHC cams) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 182 kg |
The Mercedes-Benz M 136.920 was used across Mercedes-Benz's W202 and C140 platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations-reinforced engine mounts in the C140 and shortened accessory drives in the W202-and from 1998 the facelifted W202 models adopted revised intake manifolds and updated engine management, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The M 136.920 offers smooth, dependable performance but early models (1996-1998) are prone to intake swirl flap issues if maintenance is delayed. Later units (post-1998) with revised flaps and updated control systems are significantly more durable. When maintained with correct oil (10W-40 MB 229.1) and regular coolant service, these engines can reliably exceed 200,000 km.
Primary issues include intake swirl flap failure (especially pre-1998), 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 1990s and early 2000s.
This 3.0L V6 was used in mid-range models: the W202 C-Class (C 280) and C140 CL-Class (CL 280). Production spanned from 1996 to 2000, with minor updates in 1998 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 (~10-15 kW) by optimizing fuel and ignition maps, but the naturally aspirated design limits output. Forced induction conversions are complex and require extensive modifications. Most owners preserve stock tuning to maintain reliability and engine longevity.
Fuel consumption is moderate by modern standards. In the W202 C 280, typical usage is ~12 L/100km (city) and ~7.5 L/100km (highway), or about 37 mpg UK combined. Real-world figures depend on driving style, but expect 35-40 mpg (UK) in mixed conditions. Regular unleaded (RON 95) is sufficient for optimal performance.
Yes. The M 136 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 10W-40 oil meeting MB 229.1 specification. Use of high-quality synthetic or semi-synthetic oil is critical to protect valve train components and maintain viscosity under high thermal load. Change intervals should not exceed 15,000 km or 24 months to prevent sludge and wear, especially in early production engines.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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