Ignition Coil + Spark Plugs for Mercedes Benz G-Class (2002-2008) 5.0L 5.5L

High-Output Ignition Coil and Spark Plug Tune-Up Kit for 2002-2008 Mercedes Benz G-Class (W463)

What it Does: The ignition coil and spark plug kit restores full secondary ignition voltage across all 16 firing points on the 2002-2008 Mercedes Benz G-Class twin-spark V8 to eliminate under-load misfires and erratic idling.

The Stock Mercedes Benz G-Class Thermal Breakdown

The factory M113 V8 utilizes a dual-spark per cylinder configuration where coils sit directly adjacent to high-temperature exhaust manifolds in the cramped W463 engine bay. Over thousands of heat cycles, OEM epoxy insulation hardens and develops micro-fractures, allowing voltage to leak to ground rather than reaching the plugs. Simultaneously, extended service intervals erode standard spark plug electrodes, inflating the gap and overburdening the primary coil windings. This leads to common multi-cylinder misfire codes (P0300–P0308), rough idle, lost torque, and unburnt fuel entering the catalytic converters.

The Engineering Solution

This service-ready ignition package provides a complete overhaul with 8 dual-tower ignition coils and 16 Denso PK16TT twin-tip platinum spark plugs. Engineered with high-dielectric resin and optimized copper winding ratios, these coils resist thermal breakdown and sustain peak kilovolt output under heavy throttle loads. The matched fine-wire platinum plugs lower required firing voltage and resist carbon fouling during low-RPM crawling, ensuring sharp throttle response and complete combustion without triggering check engine lights.

Technical Specifications

Compatibility

• 2002-2008 Mercedes Benz G-Class G500 5.0L V8 (M113.962)
• 2003-2004 Mercedes Benz G-Class G55 AMG 5.5L V8 Naturally Aspirated (M113.974)
• Does not fit 2005-up supercharged G55 AMG models

Frequently Asked Questions

Does this fit the W463 G-Class?

Yes, this is a direct fit for the 2002-2008 Mercedes Benz G-Class equipped with the naturally aspirated M113 engine.

Do these coils require any modifications to factory wiring or mounting brackets?

No, these units use OEM-spec primary harness pinouts and bolt directly to factory valve cover locations without modification.

The Mercedes Benz Precision Standard

Built to satisfy rigorous European diagnostic thresholds, this ignition kit provides exact impedance matching to safeguard the factory ECU driver circuits while restoring factory tow ratings and all-terrain reliability on the W463 platform.