{"product_id":"ignition-coil-spark-plugs-for-mercedes-benz-e-class-s-class-sl-class-1994-1996-3-2l","title":"Ignition Coil + Spark Plugs for Mercedes Benz E-Class S-Class SL-Class (1994-1996) 3.2L","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 1994-1996 Mercedes Benz E-Class, S-Class, SL-Class (W124, W140, R129)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and spark plug tune-up kit restores precise spark delivery across all cylinders on the 1994-1996 Mercedes Benz E-Class, S-Class, and SL-Class to eliminate secondary ignition misfires, rough idle, and unburned fuel dumping.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz M104 Waste-Spark Insulation Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe 3.2L \u003cstrong\u003eM104.99x\u003c\/strong\u003e inline-six relies on a 3-coil waste-spark ignition pack situated in the cylinder head valley directly above the spark plug wells. Over decades of heat cycling, engine bay thermal soak degrades the factory epoxy resin potting and internal primary\/secondary copper windings. This leads to dielectric breakdown, secondary micro-arcing inside the spark plug towers, and cracked coil boots. Paired with aged copper-core spark plugs exhibiting eroded ground electrodes and enlarged spark gaps, the ignition system demands higher secondary voltage than degraded coils can supply. The resulting high-load misfires introduce unburned hydrocarbons into the exhaust tract, fouling catalytic converters and triggering Check Engine lights via the HFM-SFI management system.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement ignition kit pairs three direct-fit ignition coils with six matched spark plugs calibrated for factory impedance and gap clearances. Built with high-grade magnetic silicon steel cores and temperature-resistant epoxy compounds, the coils resist thermal degradation and internal short circuits. The precision-wound secondary bobbins provide high dielectric strength and stable kilovolt output across extreme engine temperatures. Matched spark plugs feature corrosion-resistant nickel-alloy shells and thermally stable ceramic insulators to resist pre-ignition and flashover. Restoring balanced resistance across cylinders eliminates stumbling under heavy load, stabilizes cold idle, and ensures consistent waste-spark ignition timing.\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: solid font-size: min-width:\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;\"\u003e1994-1996 Mercedes Benz E-Class, S-Class, 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;\"\u003e\n\u003cstrong\u003eM104.99x\u003c\/strong\u003e (3.2L DOHC I6) \/ \u003cstrong\u003eW124\u003c\/strong\u003e, \u003cstrong\u003eW140\u003c\/strong\u003e, \u003cstrong\u003eR129\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;\"\u003e217 hp \/ 229 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\u003eUF-137\u003c\/strong\u003e, \u003cstrong\u003eUF137\u003c\/strong\u003e, \u003cstrong\u003e0221506444\u003c\/strong\u003e, \u003cstrong\u003eC1213\u003c\/strong\u003e, \u003cstrong\u003e880047\u003c\/strong\u003e, \u003cstrong\u003e133813\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\u003e1994-1996 Mercedes Benz E320 3.2L (W124)\u003c\/li\u003e\n  \u003cli\u003e1994-1996 Mercedes Benz S320 3.2L (W140)\u003c\/li\u003e\n  \u003cli\u003e1994-1996 Mercedes Benz SL320 3.2L (R129)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the W124, W140, and R129 E-Class, S-Class, and SL-Class?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1994-1996 Mercedes Benz E-Class, S-Class, and SL-Class equipped with the \u003cstrong\u003eM104\u003c\/strong\u003e 3.2L inline-six engine.\u003c\/p\u003e\n\n\u003ch4\u003eWhy are there only three ignition coils included for a six-cylinder engine?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003eM104\u003c\/strong\u003e engine uses a waste-spark ignition configuration where each coil mounts over one spark plug and powers an adjacent paired cylinder through a secondary wire lead.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eClassic German executive chassis demand strictly matched ignition impedances to operate without triggering erratic diagnostic trouble codes or lambda faults. This kit restores factory European firing dynamics to preserve catalytic converters and maintain the refined, vibration-free powerband expected of the M104 platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67518847320312,"sku":"DS-ECPVAIGFN","price":90.95,"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-e-class-s-class-sl-class-1994-1996-3-2l-1.jpg?v=1790370980","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-spark-plugs-for-mercedes-benz-e-class-s-class-sl-class-1994-1996-3-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}