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

Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2012-2015 Mercedes Benz M-Class

What it Does: Replaces fatigued factory ignition coils and fouled plugs to restore precise combustion timing, eliminate misfires, and stabilize idle across all six cylinders.

The Stock M-Class Secondary Ignition Degradation

The naturally aspirated 3.5L M276 direct-injection engine operates under high thermal loads and lean-burn conditions. Over extended duty cycles, OEM coil packs suffer from dielectric breakdown in the internal epoxy insulation, causing high-voltage leakage, erratic spark energy, and cold-start cylinder misfires. Concurrently, factory spark plugs experience electrode erosion, increasing gap resistance and placing excessive strain on primary ignition circuits.

The Engineering Solution

This comprehensive refresh kit pairs six heavy-duty ignition coil packs with six fine-wire iridium spark plugs. The coil-on-plug assemblies feature high-conductivity copper primary and secondary windings encased in thermal-resistant resin to prevent insulation tracking and arc-over. Matched iridium-tipped spark plugs offer superior thermal dissipation and high-arc stability under elevated cylinder pressures, ensuring complete fuel atomization, prompt throttle response, and smooth transient acceleration.

Technical Specifications

Compatibility

• 2012 Mercedes-Benz ML350 3.5L V6 (W166, Base & 4Matic)
• 2013 Mercedes-Benz ML350 3.5L V6 (W166, Base & 4Matic)
• 2014 Mercedes-Benz ML350 3.5L V6 (W166, Base & 4Matic)
• 2015 Mercedes-Benz ML350 3.5L V6 (W166, Base & 4Matic)

The Mercedes Benz Precision Standard

Engineered to match strict European ECU resistance parameters, this ignition kit maintains closed-loop factory mapping without triggering nuisance check engine lights or adaptation faults, ensuring uncompromising German engineering reliability.