Ignition Coil and Iridium Spark Plugs for Mercedes Benz SLC-Class (2017-2019) 2.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2017-2019 Mercedes Benz SLC-Class

Primary Function: Restores factory ignition energy, stabilizes secondary voltage delivery, and resolves high-load misfires on turbocharged 2.0L engines.

The Stock SLC-Class Ignition Thermal Degradation

The forced-induction M274 engine in the R172 chassis subjects factory coil-on-plug boots and internal windings to intense underhood thermal cycling. Over time, high combustion chamber pressures erode factory spark plug electrodes while heat soak degrades the primary and secondary epoxy insulation in the OEM coils. This leads to dielectric breakdown, high-RPM misfires under boost, rough idle conditions, and unburnt hydrocarbon buildup that triggers premature catalyst degradation.

The Engineering Solution

This comprehensive ignition service kit features direct-replacement ignition coils engineered with high-conductivity copper windings and heat-resistant silicone boots to eliminate arc-through under load. Paired with fine-wire iridium spark plugs, the system provides exceptional ignitability, reduced quenching, and stable flame propagation. The precision-gapped iridium center electrodes withstand extreme combustion temperatures, maintaining a consistent spark kernel across the entire rev range.

Technical Specifications

Compatibility

• 2017 Mercedes-Benz SLC 300 Base 2.0L L4 - Gas
• 2018 Mercedes-Benz SLC 300 Base 2.0L L4 - Gas
• 2019 Mercedes-Benz SLC 300 Base 2.0L L4 - Gas
• 2019 Mercedes-Benz SLC 300 Final Edition 2.0L L4 - Gas

The Mercedes-Benz Precision Standard

Engineered to strict European OBD-II tolerances, this ignition kit guarantees zero check-engine lights, rapid throttle response, and smooth idle stability without requiring ECU recalibration.