Ignition Coil and Iridium Spark Plugs for Mercedes Benz C-Class (2006-2011) 3.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2006-2011 Mercedes Benz C-Class

Restores peak secondary ignition voltage and combustion stability to eliminate engine misfires and rough idle across all operating temperatures.

The Stock C-Class Coil Insulation Degradation

The M272 3.5L V6 engine mounts its coil-on-plug units directly above the cylinder heads, exposing them to continuous thermal cycling and deep engine-bay heat soak. Over extended mileage, the factory resin potting becomes brittle and micro-fractures, allowing high-voltage arc leakage and internal winding insulation breakdown. This leads to weakened spark energy, intermittent P0300-P0306 misfire codes, carbon tracking on the ceramic insulator boots, and unburnt fuel fouling the catalytic converters.

The Engineering Solution

This comprehensive ignition service kit utilizes direct-fit ignition coils manufactured with high-grade copper windings and vacuum-infused, high-dielectric epoxy potting to resist thermal fatigue and dielectric breakdown. Paired with fine-wire iridium spark plugs, the assembly lowers the required ignition voltage while minimizing spark quenching. The result is instantaneous cold starting, stable idle dynamics, and complete combustion burn across high-RPM load conditions.

Technical Specifications

Compatibility

• 2006-2007 Mercedes-Benz C350 (W203) 3.5L V6 (M272.960)
• 2008-2011 Mercedes-Benz C350 / C350 4MATIC (W204) 3.5L V6 (M272.961 / M272.971)
• Interchange Part Numbers: UF535, 5C1748, C1691, E1085, IC615, IC665, 0001501980, 0001502680, 0001502780, 2729060060

The Mercedes Benz Precision Caliber

Built to factory Bosch and ME9 engine management impedance specifications, ensuring full ECU synchronization, precise dwell timing, and immediate OBD-II readiness with zero Check Engine lights.