{"product_id":"ignition-and-iridium-spark-plugs-for-mercedes-benz-slk250-2012-2015-1-8l","title":"Ignition and Iridium Spark Plugs for Mercedes-Benz SLK250 (2012-2015) 1.8L","description":"\u003ch2\u003eHigh-Performance Ignition Coils and Iridium Spark Plugs for 2012-2015 Mercedes Benz SLK-Class\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis comprehensive ignition service kit replaces degraded factory coils and plugs to restore proper spark delivery, resolve misfires, and improve combustion efficiency for the 1.8L engine.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock SLK-Class Ignition Weakness\u003c\/h3\u003e\n\u003cp\u003eOver time and repeated thermal cycles, the OEM ignition coils on the Mercedes-Benz R172 chassis are prone to internal resistance degradation. The factory epoxy resin encapsulating the primary and secondary windings breaks down from engine bay heat soak, leading to voltage leaks and weak spark output. This degradation typically manifests as rough idling, delayed throttle response, or intermittent cylinder misfires under heavy load, especially as the factory spark plugs exceed their intended service intervals and their electrode gaps widen beyond specification.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis upgraded ignition kit resolves these voltage deficiencies by utilizing high-purity copper wire internals that resist thermal breakdown and ensure consistent electrical conductivity. The coils are built with OE+ durability, employing high-temperature silicone boots and advanced epoxy potting to withstand extreme underhood conditions and prevent voltage arcing. Paired with advanced iridium spark plugs featuring a fine-wire center electrode, this package maximizes spark concentration. The iridium construction requires significantly less firing voltage while providing a more complete combustion event, resulting in smoother idle stabilization, restored power delivery, and up to a 15% improvement in overall ignition energy efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2012-2015 Mercedes Benz SLK-Class\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eM271 EVO 1.8L Turbo \/ R172\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e201 hp \/ 229 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eUF658, UF-658, C931, GN10552, 0001502580, 0040100072\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2012 Mercedes-Benz SLK250 1.8L\u003c\/li\u003e\n  \u003cli\u003e2013 Mercedes-Benz SLK250 1.8L\u003c\/li\u003e\n  \u003cli\u003e2014 Mercedes-Benz SLK250 1.8L\u003c\/li\u003e\n  \u003cli\u003e2015 Mercedes-Benz SLK250 1.8L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet demanding European tuning standards, this ignition package ensures precise engine timing and reliable operation without triggering check engine lights (CEL), maintaining the refined driving dynamics expected from your R172 roadster.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50036040728824,"sku":"DS-ESGGWQNLD","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-and-iridium-spark-plugs-for-mercedes-benz-slk250-2012-2015-1-8l-1.jpg?v=1784742947","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-and-iridium-spark-plugs-for-mercedes-benz-slk250-2012-2015-1-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}