The Mercedes — Benz M104.980 is a 3,199 cc, inline — six naturally aspirated petrol engine produced between 1993 and 1999. It was engineered as a refined, durable powerplant for mid — to — large executive sedans and coupes. Featuring a dual overhead camshaft (DOHC), 24 — valve head, and sequential multi — point fuel injection (KE — Motronic), it delivered 160 kW (218 PS) at 5,500 rpm and 310 Nm of torque at 4,000 rpm.
Fitted primarily to the W202 C — Class and W210 E — Class platforms…
All production years (1993–1999) meet Euro 2 emissions standards (VCA UK Type Approval #VCA/EMS/5681).
The Mercedes-Benz M104.980 is a 3,199 cc inline-six naturally aspirated engine engineered for executive sedans and coupes (1993–1999). It combines DOHC 24-valve architecture with sequential fuel injection to deliver smooth, linear performance. Designed to meet Euro 2 emissions requirements, it prioritizes mechanical durability and driving refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,199 cc | |
Fuel type | Petrol | |
Configuration | Inline-6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 88.5 mm × 86.6 mm | |
Power output | 160 kW (218 PS) @ 5,500 rpm | |
Torque | 310 Nm @ 4,000 rpm | |
Fuel system | Sequential multi-port fuel injection (KE-Motronic) | |
Emissions standard | Euro 2 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Chain-driven camshafts (double-row) | |
Oil type | SAE 10W-60 MB 229.3 | |
Dry weight | 189 kg |
The Mercedes-Benz M104.980 was used across Mercedes-Benz's W202 and W210 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-shorter intake runners in the W202 and revised exhaust manifolds in the W210-and from 1996 incorporated updated intake plenum design per engineering directive, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M104.980's primary reliability risk is timing chain guide wear under sustained operation, with elevated incidence in high-mileage or poorly maintained vehicles. Mercedes-Benz service data from 1998 indicated timing chain guide degradation in approximately 25% of high-mileage units, while UK DVSA MoT records show oil leaks as a frequent cause of engine bay contamination in classic W202s. Extended high-load operation and infrequent oil changes accelerate wear, making adherence to service intervals critical.
Analysis derived from Mercedes-Benz technical bulletins (1993-1999) and UK DVSA failure statistics (1995-2005). 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 M104.980 is mechanically robust and capable of high mileage when properly maintained. Its iron block and DOHC 24-valve design contribute to longevity. The main weaknesses are timing chain guide wear and valve cover gasket leaks. Regular oil changes with MB 229.3 spec oil and timely replacement of ageing components ensure reliable operation beyond 200,000 km.
The most frequent issues are timing chain guide wear, valve cover gasket leaks, ignition coil pack failures, and coolant leaks from the thermostat housing. These are well-documented in Mercedes-Benz service literature. Preventative maintenance on high-temperature seals and periodic inspection of the timing system are key to avoiding major repairs.
The M104.980 was used in the W202 C-Class (C320) from 1993 to 1999 and the W210 E-Class (E320) from 1995 to 1999. It was not used in CLK-Class or SL-Class platforms. All applications were naturally aspirated and paired with rear-wheel drive and 5-speed automatic or manual transmissions.
Significant power gains are limited due to the naturally aspirated design and mechanical fuel injection. Performance upgrades include high-flow air filters, performance camshafts, and tuned exhaust systems. Chip tuning is not applicable to KE-Motronic. Realistic gains are 10-15%, but engine balance and longevity must be preserved. Classic tuning focus is on refinement, not outright power.
In a W210 E320, typical consumption is ~14.0 L/100km (city) and ~8.5 L/100km (highway), or about 20 mpg UK combined. The KE-Motronic system is efficient for its era, but real-world figures depend heavily on driving style and vehicle condition. Expect 18-22 mpg (UK) in mixed driving for a well-maintained example.
Yes. The M104.980 is an interference engine. If the timing chain fails or jumps, the pistons can contact the valves, causing severe internal damage. This design enhances performance but increases repair costs in the event of timing component failure. Prompt inspection and replacement of worn guides are essential.
Mercedes-Benz specifies SAE 10W-60 oil meeting MB 229.3 specification. Use a high-quality synthetic oil designed for older petrol engines. Change intervals should not exceed 15,000 km or annually to ensure proper camshaft and chain lubrication, especially important for long-term durability.
Comprehensive technical documentation and regulatory references
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MERCEDES-BENZ Official Site
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EUR-Lex
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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