{"product_id":"ignition-coil-iridium-spark-plugs-for-mercedes-benz-s-class-2011-2017-4-7l-5-5l","title":"Ignition Coil + Iridium Spark Plugs for Mercedes Benz S-Class (2011-2017) 4.7L 5.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eOEM-Spec Ignition Coil and Iridium Spark Plug Kit for 2011-2017 Mercedes Benz S-Class 4.7L, 5.5L (W221\/W222 \/ M278\/M157)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Direct-Fit Ignition Coil and Double Iridium Spark Plug Kit replaces degraded factory ignition components on the 2011-2017 Mercedes-Benz S-Class to eliminate high-boost misfires and restore precise combustion timing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz S-Class Ignition Degradation\u003c\/h3\u003e\n\u003cp\u003eThe twin-turbocharged \u003cstrong\u003eM278\u003c\/strong\u003e and \u003cstrong\u003eM157\u003c\/strong\u003e engines generate intense thermal loads within the tight confines of the \u003cstrong\u003eW221\u003c\/strong\u003e and \u003cstrong\u003eW222\u003c\/strong\u003e engine bays. Over time, factory coil potting epoxy hardens and micro-fractures, allowing high-voltage secondary current to arc to the cylinder head under boost. Concurrently, ground electrode erosion widens the spark gap, forcing the coils to work harder to bridge the threshold. This electrical breakdown produces erratic combustion, rough idling, diagnostic trouble codes (P0300–P0308), and limp-mode intervention during wide-open throttle acceleration.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition service kit restores factory energy output using reinforced ignition coils paired with OE-matched double iridium spark plugs. Engineered to replace \u003cstrong\u003eA2769063700\u003c\/strong\u003e, the ignition coils feature high-dielectric epoxy resin and heat-resistant silicone boots to isolate against dielectric breakdown. The companion \u003cstrong\u003eBosch ZR6SII3320\u003c\/strong\u003e spark plugs utilize laser-welded, fine-wire 360-degree continuous iridium center electrodes to minimize ignition voltage demand, stabilize idle quality, and suppress flame blowout under maximum manifold boost pressure.\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;\"\u003e2011-2017 Mercedes Benz S-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;\"\u003eM278, M157 \/ W221, W222\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;\"\u003e429 - 577 hp \/ 516 - 664 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;\"\u003eA2769063700, 2769063700, 2769060501, 0040103070, UF741, ZR6SII3320\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\u003e2012-2017 Mercedes Benz S-Class S550 4.7L V8 Biturbo (M278)\u003c\/li\u003e\n  \u003cli\u003e2011-2017 Mercedes Benz S-Class S63 AMG 5.5L V8 Biturbo (M157)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the W221 and W222 S-Class?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2011-2017 Mercedes Benz S-Class equipped with the M278 and M157 engine platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these spark plugs require gapping prior to installation?\u003c\/strong\u003e\u003cbr\u003e No, these double iridium spark plugs arrive pre-set to factory clearance; manual adjustment risks fracturing the delicate fine-wire center electrode.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eMaintaining the intricate tolerances of direct-injected Mercedes-Benz Biturbo V8 engines demands OE-level spark continuity to prevent knock-sensor retarding, maintain fuel economy, and guarantee clean, CEL-free engine operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50625816101112,"sku":"DS-EXH4109L8","price":598.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-mercedes-benz-s-class-2011-2017-4-7l-5-5l-1.jpg?v=1790351725","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-iridium-spark-plugs-for-mercedes-benz-s-class-2011-2017-4-7l-5-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}