Ignition Coil & Iridium Spark Plugs for Mercedes-Benz C300 (2013) 3.5L V6

High-Performance Ignition Coil & Iridium Spark Plug Kit for Mercedes Benz C-Class

Replaces degrading factory ignition coils and worn spark plugs to restore optimal combustion efficiency, eliminate misfires, and deliver a more consistent spark under high loads.

The Stock C-Class Ignition Degradation

Over time, the M276 V6 engine's factory ignition coils suffer from severe thermal cycling and voltage leakage. The OEM epoxy potting degrades under sustained engine bay temperatures, leading to micro-cracks in the plastic coil housings. This results in weak spark delivery, parasitic voltage loss, rough idling, hesitation under acceleration, and inevitable cylinder misfire codes (P0300 series). Furthermore, aging factory platinum plugs erode, increasing the spark gap and forcing the ignition coils to work harder, which accelerates their failure and reduces overall engine combustion efficiency.

The Engineering Solution

This comprehensive ignition overhaul kit addresses these thermal and electrical vulnerabilities by upgrading both the coils and the spark plugs. The new direct-replacement ignition coils feature high-grade durable copper wire primary and secondary bobbins, internally insulated with advanced thermal-resistant materials to prevent heat-induced breakdown. This ensures a highly concentrated spark without voltage bleed. Paired with the included Iridium spark plugs—which boast a significantly higher melting point and superior conductivity compared to standard plugs—the system provides up to a 15% increase in spark energy. This OE+ upgrade yields improved throttle response, stabilized idle, and complete fuel burn across the entire RPM range.

Technical Specifications

Compatibility

• 2013 Mercedes-Benz C300 3.5L V6

The Mercedes Benz Precision Standard

Engineered to meet strict European ECU parameters, this direct-replacement ignition kit ensures a precise fit, immediate elimination of check engine lights, and restores the smooth, refined power delivery expected from a W204 chassis.