{"product_id":"ignition-coil-iridium-spark-plugs-for-mercedes-benz-cl-class-2011-2014-4-7l-5-5l","title":"Ignition Coil + Iridium Spark Plugs for Mercedes Benz CL-Class (2011-2014) 4.7L 5.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eOEM-Grade Ignition Coil and Iridium Spark Plug Kit for 2011-2014 Mercedes Benz CL-Class 4.7L, 5.5L (C216 M278 \/ M157)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete ignition kit replaces worn coil-on-plug modules and fouled plugs on the 2011-2014 Mercedes Benz CL-Class to eliminate high-boost misfires, restore clean flame kernel development, and stabilize idle quality.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz CL-Class Thermal Breakdown\u003c\/h3\u003e\n\u003cp\u003eIn the \u003cstrong\u003eC216\u003c\/strong\u003e chassis, the twin-turbocharged \u003cstrong\u003eM278\u003c\/strong\u003e and \u003cstrong\u003eM157\u003c\/strong\u003e engines generate extreme underhood thermal loads. Prolonged heat soak severely degrades factory coil epoxy insulation, causing internal dielectric breakdown, micro-arcing, and intermittent primary winding failure. Simultaneously, extreme cylinder pressures inherent to direct-injected biturbo applications erode standard plug gaps, leading to severe spark blow-out and rough running under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis service kit resolves secondary ignition loss by matching 8 high-output direct-replacement ignition coils with factory-matched Bosch double iridium spark plugs. Engineered with high-dielectric internal epoxy and reinforced silicone boots, these coils resist voltage leakage under peak cylinder pressures. The pre-gapped Bosch \u003cstrong\u003eZR6SII3320\u003c\/strong\u003e double iridium plugs utilize a laser-welded fine-wire center electrode and platinum ground inlay to maintain precise arc gap tolerances, prevent heat-induced fouling, and ensure stable combustion.\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;\"\u003e2011-2014 Mercedes Benz CL-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;\"\u003e\n\u003cstrong\u003eM278\u003c\/strong\u003e (4.7L), \u003cstrong\u003eM157\u003c\/strong\u003e (5.5L) \/ \u003cstrong\u003eC216\u003c\/strong\u003e\n\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 - 536 hp \/ 516 - 590 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;\"\u003e\n\u003cstrong\u003eA2769063700\u003c\/strong\u003e, \u003cstrong\u003e2769063700\u003c\/strong\u003e, \u003cstrong\u003e2769060501\u003c\/strong\u003e, \u003cstrong\u003eUF741\u003c\/strong\u003e, \u003cstrong\u003e0040103070\u003c\/strong\u003e, \u003cstrong\u003eZR6SII3320\u003c\/strong\u003e\n\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\u003e2011-2014 Mercedes Benz CL-Class CL550 4.7L V8 Biturbo (\u003cstrong\u003eM278\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e2011-2014 Mercedes Benz CL-Class CL63 AMG 5.5L V8 Biturbo (\u003cstrong\u003eM157\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the C216 CL-Class?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2011-2014 Mercedes Benz CL-Class equipped with the \u003cstrong\u003eM278\u003c\/strong\u003e 4.7L or \u003cstrong\u003eM157\u003c\/strong\u003e 5.5L Biturbo V8 engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the recommended installation torque for the spark plugs?\u003c\/strong\u003e\u003cbr\u003e Torque the plugs dry to the factory-specified 23 Nm (17 lb-ft) into cold aluminum cylinder heads to maintain proper ground electrode indexing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eMaintaining European high-output powertrains demands strict adherence to OE electrical impedance and ignition timing parameters. This direct-replacement kit delivers precise secondary voltage output that interfaces seamlessly with the Bosch MED17.7 ECU, eliminating phantom misfire fault codes and preserving catalytic converter efficiency.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50625854079224,"sku":"DS-EWZMAQEFF","price":499.95,"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-cl-class-2011-2014-4-7l-5-5l-1.jpg?v=1790352332","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-iridium-spark-plugs-for-mercedes-benz-cl-class-2011-2014-4-7l-5-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}