Ignition Coil and Iridium Spark Plugs for Mercedes Benz C-Class (2001-2005) 2.6L 3.2L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2001-2005 Mercedes Benz C-Class

Primary Function: Restores factory secondary ignition output and precise combustion timing across all cylinders for Mercedes-Benz M112 V6 engines experiencing misfires or degraded spark energy.

The Stock C-Class Ignition Breakdown

The Mercedes-Benz M112 18-valve V6 utilizes a twin-spark dual-plug-per-cylinder configuration that places high thermal and electrical demands on the factory coil packs. Over time, engine bay heat cycles degrade the internal epoxy resin and copper windings inside the OEM coils. This thermal stress causes micro-fractures in the insulation, leading to dielectric breakdown, high-voltage flashover, intermittent secondary misfires under load, and rough idling. Additionally, standard spark plugs erode at the electrode gap, increasing secondary resistance and accelerating coil failure.

The Engineering Solution

This complete tune-up kit includes 6 direct-replacement ignition coils and 12 high-durability iridium spark plugs engineered to factory tolerances. The coil assemblies feature reinforced thermoplastic housings, high-grade copper primary and secondary windings, and direct-fit blade terminal connectors that resist thermal degradation and prevent voltage leakage. The paired iridium spark plugs feature fine-wire center electrodes for reduced voltage demand, consistent spark propagation, and long service life under continuous thermal loading.

Technical Specifications

Compatibility

• 2001-2005 Mercedes-Benz C240 Base, 4Matic, Elegance (2.6L M112 V6)
• 2001-2005 Mercedes-Benz C320 Base, 4Matic, Sport (3.2L M112 V6)

The Mercedes Benz Precision Standard

Engineered to meet rigorous European diagnostic standards, this ignition package delivers stable millivolt signals to the ME-SFI engine control unit, preventing false misfire diagnostic trouble codes (DTCs) and ensuring smooth, closed-loop fuel trim regulation.