Ignition Coil and Iridium Spark Plugs for Mercedes Benz SLK-Class (2001-2004) 2.3L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2001-2004 Mercedes Benz SLK-Class

Primary Function: Restores complete secondary ignition energy and consistent spark delivery under boost for the supercharged 2.3L M111 powertrain.

The Stock SLK-Class Ignition Breakdown

Thermal fatigue in the tightly packaged R170 engine bay degrades OEM coil pack insulation over time, resulting in dielectric breakdown and internal resistance drift. Under the high cylinder pressures of the supercharged 2.3L engine, aged coils and eroded spark plugs cause spark blowout, hesitation under acceleration, rough idle, and intermittent misfire trouble codes (P0300 through P0304).

The Engineering Solution

This complete ignition overhaul kit includes four direct-replacement coil-on-plug units built with premium copper primary and secondary windings for high energy saturation and rapid discharge. Paired with four fine-wire iridium core spark plugs, this setup reduces the required breakdown voltage across the gap, optimizes flame front propagation, and resists thermal erosion under forced-induction combustion conditions.

Technical Specifications

Compatibility

• 2001 Mercedes-Benz SLK230 Kompressor 2.3L L4 Supercharged (R170)
• 2002 Mercedes-Benz SLK230 Kompressor 2.3L L4 Supercharged (R170)
• 2003 Mercedes-Benz SLK230 Kompressor 2.3L L4 Supercharged (R170)
• 2004 Mercedes-Benz SLK230 Kompressor 2.3L L4 Supercharged (R170)

The Mercedes Benz Precision Standard

Engineered to match factory electrical resistance and dwell-time profiles, ensuring seamless communication with the factory Bosch ECU without triggering false misfire codes or check engine lights.