Ignition Coil and Iridium Spark Plugs for Mercedes Benz SLK-Class (2012-2015) 3.5L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2012-2015 Mercedes Benz SLK-Class

Primary Function: Restores factory ignition energy, eliminates misfire codes, and stabilizes idle across all six cylinders by replacing aged coil packs and worn spark plugs.

The Stock SLK-Class Ignition Breakdown

Under repeated thermal cycling in the compact R172 engine bay, OEM ignition coil packs suffer dielectric breakdown and internal copper winding degradation. Concurrently, factory spark plug gaps erode over time, increasing electrical resistance. This causes high-RPM misfires, uneven combustion, diagnostic trouble codes (P0300–P0306), and sluggish throttle response in the direct-injected 3.5L engine.

The Engineering Solution

This 6-cylinder ignition service kit features coil-on-plug units wound with high-purity internal copper wiring sealed in thermal-shock-resistant epoxy. Paired with fine-wire iridium spark plugs, the system provides high spark energy at lower required voltages, ensuring instantaneous flame kernel propagation, complete fuel burn, and consistent spark delivery under heavy load.

Technical Specifications

Compatibility

• 2012 Mercedes-Benz SLK-Class (SLK350 Base) 3.5L V6 Gas
• 2013 Mercedes-Benz SLK-Class (SLK350 Base) 3.5L V6 Gas
• 2014 Mercedes-Benz SLK-Class (SLK350 Base) 3.5L V6 Gas
• 2015 Mercedes-Benz SLK-Class (SLK350 Base) 3.5L V6 Gas

The Mercedes Benz Precision Caliber

Built to precise European diagnostic tolerances, these ignition components integrate seamlessly with factory ECU timing maps, preventing false misfire flags and maintaining seamless direct-injection performance with zero CEL issues.