Ignition Coil + Spark Plugs for Mercedes Benz CLS-Class (2007-2011) 5.5L

OEM-Grade Ignition Coil and Spark Plug Kit for 2007-2011 Mercedes Benz CLS-Class 5.5L (W219 / M273)

What it Does: The Ignition Coil and Spark Plug Kit replaces degraded secondary ignition components on the 2007-2011 Mercedes-Benz CLS-Class to eliminate misfires, stabilize idle speed, and restore peak combustion efficiency.

The Stock Mercedes Benz CLS-Class Ignition Heat Degradation

Under the tightly packaged engine bay of the W219 chassis, the M273 5.5L V8 operates under sustained high thermal loads that steadily break down factory ignition components. Over time, heat soak degrades the internal epoxy potting and secondary copper windings of the factory coils, leading to internal shorting, micro-arcing, and intermittent voltage loss. Simultaneously, OEM spark plugs experience electrode erosion and gap enlargement, increasing the ionization voltage required to bridge the gap. This excessive resistance overburdens aging coil windings, resulting in rough running conditions, sluggish throttle response, reduced fuel economy, and persistent P0300 through P0308 cylinder misfire codes stored in the ECU.

The Engineering Solution

This complete ignition tune-up kit restores high-voltage delivery using eight direct-fit ignition coils built to OE specifications alongside matched NGK G-Power platinum spark plugs (LKR7BGP / 95983). The coils feature high-grade magnetic silicon steel cores and temperature-resistant silicone boots to resist dielectric puncture and seal out moisture. Paired with fine-wire platinum center electrodes, this package lowers required firing voltage, provides rapid flame propagation, and ensures reliable ignition under heavy load. Replacing all eight cylinders simultaneously balances electrical resistance across both cylinder banks of the M273, restoring smooth operation and factory power delivery.

Technical Specifications

Compatibility

• 2007-2011 Mercedes Benz CLS-Class CLS550 5.5L V8 (M273)

Frequently Asked Questions

Does this fit the W219 CLS-Class?
Yes, this is a direct fit for the 2007-2011 Mercedes Benz CLS-Class equipped with the M273 5.5L V8 engine.

What is the recommended installation torque for the spark plugs?
Torque the spark plugs to the factory specification of 20 to 25 Nm (15 to 18 lb-ft) into clean, dry cylinder head threads.

The Mercedes Benz Precision Caliber

European high-compression powertrains require exact secondary ignition voltages to avoid misfire detection and unburned fuel entering catalytic converters. This complete ignition service kit delivers consistent spark discharge and exact factory connector engagement to keep your vehicle running without check engine lights.