Ignition Coil + Spark Plugs for Mercedes Benz SL-Class (2007-2012) 5.5L

Direct-Fit Ignition Coil and Spark Plug Kit for 2007-2012 Mercedes Benz SL-Class 5.5L (R230 / M273)

What it Does: The complete ignition service kit replaces deteriorated ignition coils and fouled plugs on the 2007-2012 SL-Class to eliminate secondary ignition misfires and restore combustion efficiency.

The Stock Mercedes Benz SL-Class Ignition Breakdown

Under-hood thermal cycling in the tightly packaged R230 engine bay severely degrades factory coil boot silicone and internal copper windings on the M273 5.5L V8. Over time, high cylinder head temperatures cause internal insulation breakdown and micro-cracking in the primary and secondary bobbin assemblies. This yields high-rpm spark blowout, intermittent misfires, unburned hydrocarbon buildup in the catalytic converters, and sluggish transient throttle response. Factory platinum plugs also experience gap widening past 0.040 inches, increasing the required dielectric breakdown voltage and accelerating coil pack failure.

The Engineering Solution

This comprehensive ignition service kit supplies eight matched coil-on-plug modules engineered with high-dielectric epoxy potting and reinforced PBT thermoplastic housings to resist thermal fatigue and dielectric puncture. The low-resistance primary copper windings and high-turn secondary windings deliver consistent dwell times and robust spark energy across all eight cylinders. Paired with genuine NGK LKR7BGP G-Power platinum fine-wire spark plugs, this kit stabilizes flame kernel propagation, eliminates rough idle harmonics, and directly interchanges with OEM part numbers 0001501980, 0001502680, and 2729060060 without harness adaptation.

Technical Specifications

Compatibility

• 2007 Mercedes Benz SL-Class SL550 5.5L V8 (M273)
• 2008 Mercedes Benz SL-Class SL550 5.5L V8 (M273)
• 2009 Mercedes Benz SL-Class SL550 5.5L V8 (M273)
• 2010 Mercedes Benz SL-Class SL550 5.5L V8 (M273)
• 2011 Mercedes Benz SL-Class SL550 5.5L V8 (M273)
• 2012 Mercedes Benz SL-Class SL550 5.5L V8 (M273)

Frequently Asked Questions

Does this fit the R230 SL-Class?
Yes, this is a direct fit for the 2007-2012 Mercedes Benz SL-Class equipped with the M273 engine.

Should spark plugs and coils be torqued to specific factory tolerances?
Yes, torque spark plugs to 20-25 Nm (15-18 lb-ft) dry and secure coil mounting bolts to 9 Nm without over-torquing.

The Mercedes Benz Precision Standard

Maintaining the sophisticated electronics of the Bosch ME 9.7 engine management system requires clean, uninterrupted spark delivery to prevent catalyst-damaging misfire codes. This direct-replacement kit adheres to tight factory electrical tolerances, ensuring smooth idle transitions and zero check-engine lights on European grand tourers.