Ignition Coil and Iridium Spark Plugs for Mercedes Benz CLA-Class (2014-2019) 2.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2014-2019 Mercedes Benz CLA-Class

What it Does: Restores factory ignition performance and eliminates cylinder misfires by replacing degraded coil-on-plug assemblies and fouled spark plugs with high-dielectric coils and fine-wire iridium plugs.

The Stock CLA-Class Ignition Weakness

The turbocharged direct-injection M270 engine in the C117 chassis operates under high cylinder pressures and elevated under-hood temperatures. Over time, factory ignition coils suffer from internal thermal breakdown, degrading the internal copper windings and cracking the silicone boots. This dielectric fatigue, combined with gap erosion on aged factory spark plugs, increases resistance across the secondary ignition circuit. The result is erratic spark delivery, cold-start hesitation, rough idle, increased fuel consumption, and high-boost misfires under load that trigger CEL fault codes.

The Engineering Solution

This direct-replacement ignition tune-up kit features four coil-on-plug units engineered with high-conductivity copper windings and high-grade epoxy encapsulation to resist thermal degradation and internal shorting. Matched with four fine-wire iridium spark plugs, this setup delivers a focused, stable spark kernel capable of withstanding dense direct-injected fuel charges. Direct-fit blade connectors ensure seamless integration with the factory wiring harness without signal distortion.

Technical Specifications

Compatibility

• 2014-2019 Mercedes-Benz CLA250 Base 2.0L L4 Turbocharged (C117)
• 2014-2019 Mercedes-Benz CLA250 4Matic 2.0L L4 Turbocharged (C117)

The Mercedes Benz Precision Standard

Engineered to exact European diagnostic tolerances, this ignition service kit maintains precise resistance values required by the Mercedes-Benz Bosch/Delphi engine management systems, ensuring clean combustion cycles without false knock detection or Check Engine Lights.