Ignition Coil & Iridium Spark Plugs for Mercedes-Benz GLK350 S400 (2010-2013) 3.5L V6

High-Output Ignition Coil & Iridium Spark Plugs for 2010-2013 Mercedes Benz GLK-Class

Replaces aging OEM ignition components to restore proper voltage delivery, eliminate misfires, and ensure consistent combustion across the RPM range.

The Stock GLK-Class Ignition System Weakness

The M272 and M276 V6 engines found in the X204 chassis are notorious for premature ignition coil degradation due to extreme engine bay heat cycling. Over time, the factory coil packs suffer from internal epoxy breakdown and primary winding resistance changes. This prolonged heat soak leads to micro-arcing, intermittent circuit failures, and severely degraded spark energy. The mechanical result is a sluggish throttle response, rough idling, raw fuel dumping into the exhaust tract, and the inevitable flashing check engine light (CEL) triggered by P0300-series misfire codes. Furthermore, standard OEM spark plugs degrade over thousands of combustion cycles, increasing the spark gap and forcing the coils to work harder to bridge it, rapidly compounding the failure rate.

The Engineering Solution

This OE+ replacement kit features completely redesigned ignition coils built with high-grade internal copper wire windings that resist high thermal loads and prevent resistance spikes under heavy engine load. The external housing utilizes high-dielectric polymer compounds to prevent voltage leaks and withstand aggressive heat cycling environments. Paired with advanced iridium-tipped spark plugs, this specific kit provides an approximate 15% increase in energy transfer efficiency over standard factory components. The fine-wire iridium center electrode requires less voltage to fire while maintaining a precise gap over an extended service life. This ensures a complete air-fuel mixture combustion process, restoring factory horsepower output, maximizing fuel economy, and preventing unburned hydrocarbons from damaging the sensitive downstream catalytic converters.

Technical Specifications

Compatibility

• 2010-2013 Mercedes-Benz GLK350 3.5L V6
• 2010-2013 Mercedes-Benz S400 3.5L V6

The Mercedes Benz Precision Standard

European platforms demand strict voltage parameters and exact resistance values to communicate flawlessly with the ME-SFI engine control unit. This ignition kit is factory tested to meet or exceed strict OEM quality control standards, ensuring zero CELs and returning your GLK-Class to its renowned autobahn-ready smoothness and mechanical reliability.