Ignition Coil and Iridium Spark Plugs for Mercedes Benz SLK-Class (2012-2015) 1.8L

Direct-Replacement Ignition Kit for 2012-2015 Mercedes Benz SLK-Class

What it Does: Restores factory ignition energy and combustion stability across all four cylinders by replacing worn coil-on-plug assemblies and fouled spark plugs with high-dielectric coils and fine-wire iridium plugs.

The Stock SLK-Class Ignition Breakdown

Under continuous thermal cycling and forced-induction cylinder pressures, factory M271 ignition coils suffer from dielectric insulation degradation and internal copper winding fatigue. Over time, micro-arcing and boot dry-rot lead to secondary voltage leakage, manifesting as hesitation under load, erratic idle, and cylinder-specific misfire DTCs (P0300–P0304) when the spark is blown out under boost.

The Engineering Solution

This comprehensive ignition service kit features four coil-on-plug assemblies manufactured with high-grade magnetic steel cores, thermal-resistant epoxy resin encapsulation, and high-conductivity copper primary and secondary windings. Paired with fine-wire iridium spark plugs engineered with laser-welded center electrodes, this package delivers consistent 30kV+ discharge capability, resisting quench under cylinder boost pressures and maintaining precise ignition timing without throwing ECU fault codes.

Technical Specifications

Compatibility

• 2012 Mercedes-Benz SLK250 Base 1.8L L4 Gas (R172)
• 2013 Mercedes-Benz SLK250 Base 1.8L L4 Gas (R172)
• 2014 Mercedes-Benz SLK250 Base 1.8L L4 Gas (R172)
• 2015 Mercedes-Benz SLK250 Base 1.8L L4 Gas (R172)

The Mercedes Benz Precision Standard

Engineered to meet stringent European engine management parameters, these components ensure direct plug-and-play integration with factory harnesses, preventing secondary ignition noise and eliminating Check Engine Lights.