{"product_id":"ignition-coil-spark-plugs-for-mercedes-benz-sl-class-2007-2012-5-5l","title":"Ignition Coil + Spark Plugs for Mercedes Benz SL-Class (2007-2012) 5.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Ignition Coil and Spark Plug Kit for 2007-2012 Mercedes Benz SL-Class 5.5L (R230 \/ M273)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz SL-Class Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eUnder-hood thermal cycling in the tightly packaged \u003cstrong\u003eR230\u003c\/strong\u003e engine bay severely degrades factory coil boot silicone and internal copper windings on the \u003cstrong\u003eM273\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 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 \u003cstrong\u003eNGK LKR7BGP\u003c\/strong\u003e G-Power platinum fine-wire spark plugs, this kit stabilizes flame kernel propagation, eliminates rough idle harmonics, and directly interchanges with OEM part numbers \u003cstrong\u003e0001501980\u003c\/strong\u003e, \u003cstrong\u003e0001502680\u003c\/strong\u003e, and \u003cstrong\u003e2729060060\u003c\/strong\u003e without harness adaptation.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2007-2012 Mercedes Benz SL-Class\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eM273 5.5L V8 \/ R230\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e382 hp \/ 391 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eUF535, 0001501980, 0001502680, 0001502780, 2729060060\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007 Mercedes Benz SL-Class SL550 5.5L V8 (M273)\u003c\/li\u003e\n  \u003cli\u003e2008 Mercedes Benz SL-Class SL550 5.5L V8 (M273)\u003c\/li\u003e\n  \u003cli\u003e2009 Mercedes Benz SL-Class SL550 5.5L V8 (M273)\u003c\/li\u003e\n  \u003cli\u003e2010 Mercedes Benz SL-Class SL550 5.5L V8 (M273)\u003c\/li\u003e\n  \u003cli\u003e2011 Mercedes Benz SL-Class SL550 5.5L V8 (M273)\u003c\/li\u003e\n  \u003cli\u003e2012 Mercedes Benz SL-Class SL550 5.5L V8 (M273)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the R230 SL-Class?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2007-2012 Mercedes Benz SL-Class equipped with the M273 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould spark plugs and coils be torqued to specific factory tolerances?\u003c\/strong\u003e\u003cbr\u003e Yes, torque spark plugs to 20-25 Nm (15-18 lb-ft) dry and secure coil mounting bolts to 9 Nm without over-torquing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eMaintaining 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.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50625850802424,"sku":"DS-E4ODMH01E","price":248.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-mercedes-benz-sl-class-2007-2012-5-5l-1.jpg?v=1790352297","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-mercedes-benz-sl-class-2007-2012-5-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}