Ignition Coil + Iridium Spark Plugs for Mercedes Benz G-Class (2005-2008) 5.5L

High-Output Ignition Coil & Iridium Spark Plug Kit for 2005-2008 Mercedes Benz G-Class (W463)

What it Does: The complete ignition kit replaces worn factory ignition coils and spark plugs on the 2005-2008 Mercedes Benz G-Class to eliminate boost-induced misfires and restore balanced flame kernel propagation across all 16 combustion points.

The Stock Mercedes Benz G-Class Ignition Breakdown

The supercharged 5.5L M113K engine in the W463 chassis subjects ignition components to intense thermal stress and high cylinder pressures. Over time, radiant engine bay heat degrades the factory dual-output coil epoxy insulation, causing internal copper winding resistance to drift and spark leakage across the coil towers. Paired with aged spark plug electrodes exhibiting expanded gaps, this degradation causes spark blowout under boost, sluggish throttle response, erratic idle, and multi-cylinder misfire fault codes (P0300–P0308).

The Engineering Solution

This direct-replacement kit pairs 8 dual-tower ignition coils with 16 Denso Iridium TT (IKH20TT) spark plugs engineered specifically for the twin-plug Mercedes-Benz ignition strategy. Each coil features reinforced dielectric epoxy housings and high-conductivity copper primary and secondary windings built to resist thermal breakdown under sustained load. The Denso spark plugs utilize a 0.4mm iridium center electrode and a 0.7mm platinum ground electrode, significantly reducing ignition voltage demand and ensuring stable combustion through positive manifold pressure.

Technical Specifications

Compatibility

• 2005-2008 Mercedes Benz G-Class G55 AMG (Supercharged 5.5L V8)

Frequently Asked Questions

Does this fit the W463 G-Class?

Yes, this is a direct fit for the 2005-2008 Mercedes Benz G-Class equipped with the supercharged 5.5L M113K engine.

Should the Denso Iridium TT spark plugs be gapped before installation?

No, the plugs are pre-set to factory specifications and manual adjustment risks fracturing the ultra-fine 0.4mm iridium center electrode.

The Mercedes Benz Precision Standard

Maintaining precision ignition timing and complete fuel burn on high-output European powertrains is critical to preserving downstream lambda sensors and catalytic converters. This kit maintains OEM dwell profiles, preventing check engine lights while restoring crisp high-rpm acceleration.