Ignition Coil and Iridium Spark Plugs for Mercedes Benz GLK-Class (2013-2015) 3.5L

Direct-Fit High-Dielectric Ignition Coil and Iridium Plug Kit for 2013-2015 Mercedes-Benz GLK-Class

Complete Ignition Refresh: This 6-cylinder ignition service kit replaces heat-degraded factory coil packs and worn spark plugs to eliminate misfires, stabilize idle fluctuations, and restore factory ignition efficiency on the M276 3.5L V6 engine.

The Stock GLK-Class Ignition Thermal Degradation

Under tight engine bay packaging and repetitive thermal cycles, the factory ignition coil boots and internal insulation on the X204 chassis degrade over time. Heat-induced micro-fractures in the epoxy casing allow dielectric breakdown and secondary voltage leakage to ground. This breakdown leads to intermittent spark flashover, uneven combustion cycles, reduced fuel efficiency, and stored cylinder misfire diagnostic trouble codes (P0300 through P0306). Furthermore, worn factory plug electrodes widen the spark gap, forcing the coils to work harder and accelerating primary circuit failure.

The Engineering Solution

This comprehensive service package delivers reliable spark energy across the entire operating RPM range. Each coil-on-plug unit is engineered with high-conductivity internal copper windings and fortified high-dielectric epoxy housing to prevent internal arching and heat soak. Paired with fine-wire iridium spark plugs that resist electrode erosion under direct-injection cylinder pressures, this system ensures a concentrated spark kernel, rapid flame propagation, and dependable throttle response.

Technical Specifications

Compatibility

• 2013 Mercedes-Benz GLK 350 Base 3.5L V6 (M276.957, X204)
• 2013 Mercedes-Benz GLK 350 4MATIC 3.5L V6 (M276.957, X204)
• 2014 Mercedes-Benz GLK 350 Base 3.5L V6 (M276.957, X204)
• 2014 Mercedes-Benz GLK 350 4MATIC 3.5L V6 (M276.957, X204)
• 2015 Mercedes-Benz GLK 350 Base 3.5L V6 (M276.957, X204)
• 2015 Mercedes-Benz GLK 350 4MATIC 3.5L V6 (M276.957, X204)

The Mercedes-Benz Precision Standard

Manufactured to precise European electrical tolerances, this direct replacement kit maintains proper resistance values to ensure clean ECU communication, zero check engine lights, and seamless cold-start operation.