Ignition Coil + Spark Plugs for Mercedes Benz M-Class (2008-2011) 5.5L

Direct-Replacement Ignition Coil and Spark Plug Kit for 2008-2011 Mercedes Benz M-Class 5.5L (W164 / M273)

What it Does: The complete ignition kit replaces worn coil packs and fouled spark plugs on the 2008-2011 Mercedes Benz M-Class 5.5L to eliminate cylinder misfires, restore clean flame-front propagation, and stabilize idle quality.

The Stock Mercedes Benz M-Class Secondary Ignition Degradation

In the W164 ML550, the 32-valve M273 V8 generates significant under-hood thermal load. Over extended heat cycles, factory ignition coil boots suffer from dielectric breakdown and micro-cracking. Weakened internal windings and degraded silicone boots permit secondary spark energy to arc directly to the cylinder head rather than firing across the plug gap. Under wide-open-throttle load and high cylinder pressures, this voltage leak triggers random P0300 through P0308 diagnostic trouble codes, poor fuel economy, and potential catalytic converter contamination from unburnt fuel.

The Engineering Solution

This service kit resolves secondary ignition failure by pairing 8 direct-fit ignition coils with 8 pre-gapped NGK LKR7BGP platinum-tipped spark plugs. The coil assemblies are built with high-conductivity copper wire windings insulated by high-dielectric epoxy potting to withstand continuous engine-bay heat without voltage drop. Matched with fine-wire platinum center electrodes, this set lowers primary firing voltage demand, guarantees immediate arc transfer under load, and directly matches factory specifications for OEM part numbers 0001502780 and 2729060060.

Technical Specifications

Compatibility

• 2008-2011 Mercedes Benz M-Class ML550 5.5L V8 (M273 Engine)

Frequently Asked Questions

Does this fit the W164 M-Class?
Yes, this is a direct fit for the 2008-2011 Mercedes Benz M-Class equipped with the M273 5.5L V8 engine.

Do these spark plugs require gapping before installation?
The included NGK LKR7BGP platinum spark plugs arrive factory pre-gapped, though checking gap clearance with a feeler gauge prior to installation is recommended practice.

The Mercedes Benz Precision Standard

European V8 powertrains rely on strict primary resistance values to prevent false misfire detection by the Bosch ME9.7 engine management system. This ignition kit delivers factory-calibrated impedance curves to ensure smooth operation without check engine lights.