{"product_id":"mercedes-w221-fuel-tank-wiring-harness-s300-s350-s400-s500","title":"Mercedes W221 Fuel Pump Wiring Harness – S300 S350 S400 S500","description":"\n\u003ch2\u003eUpgraded Fuel Pump Wiring Harness for Mercedes-Benz W221 S-Class\u003c\/h2\u003e\n\u003cp\u003eKeep your Mercedes-Benz S-Class running at its best with this precision-engineered replacement fuel tank wiring harness. Designed specifically for the W221 chassis — covering the S300, S350, S400, and S500 — this improved wire harness restores reliable electrical connectivity between your fuel pump and the vehicle's control system, ensuring consistent fuel delivery and optimal engine performance.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Upgrade Your W221 Fuel Tank Wiring?\u003c\/h3\u003e\n\u003cp\u003eOver time, original fuel pump wiring can degrade due to heat, vibration, and fuel exposure, leading to poor electrical connections and inconsistent fuel pump operation. This upgraded harness is built from high-grade \u003cstrong\u003estainless steel\u003c\/strong\u003e hardware components with durable insulated wiring, providing a more robust and long-lasting alternative to the factory original.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect-Fit Compatibility:\u003c\/strong\u003e Engineered specifically for Mercedes-Benz W221 S-Class models (S300, S350, S400, S500)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImproved Design:\u003c\/strong\u003e Enhanced wiring construction for greater durability and connection stability over the OEM specification\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality Materials:\u003c\/strong\u003e Stainless steel components resist corrosion and withstand the harsh under-tank environment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Installation:\u003c\/strong\u003e Matches original connector locations for straightforward fitment without modification\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo High-Concern Chemicals:\u003c\/strong\u003e Free from hazardous substances for safe handling and installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMercedes-Benz S300 (W221)\u003c\/li\u003e\n  \u003cli\u003eMercedes-Benz S350 (W221)\u003c\/li\u003e\n  \u003cli\u003eMercedes-Benz S400 (W221)\u003c\/li\u003e\n  \u003cli\u003eMercedes-Benz S500 (W221)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMercedes-Benz W221\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eS300, S350, S400, S500\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHazardous Chemicals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cp\u003eAlways disconnect your vehicle's battery before working on any fuel system electrical components. Ensure the fuel tank is at a safe level before beginning work. If you are not confident in performing fuel system repairs, we recommend consulting a qualified automotive technician. For general vehicle electrical safety guidance, refer to the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-60mpa-pressure-gauge-s60h-diesel-injector-nozzle-tester-8000psi\"\u003e0-60MPa Pressure Gauge for S60H Diesel Injector Nozzle Tester\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Fuel_cell_vehicle\" target=\"_blank\" rel=\"noopener\"\u003eFuel cell vehicle\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which Mercedes-Benz models is this W221 fuel pump wiring harness compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This fuel tank wiring harness is designed to fit the Mercedes-Benz W221 S-Class platform, specifically the S300, S350, S400, and S500 model variants. Please verify your chassis and model year before ordering to ensure correct fitment.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this a direct OEM replacement or an upgraded aftermarket wiring harness?\u003c\/h4\u003e\n\u003cp\u003eA: This is an improved aftermarket wiring harness. It is engineered to match the original connector locations for plug-and-play installation, while featuring upgraded materials — including stainless steel hardware — for improved durability and connection reliability compared to the factory original.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How difficult is it to install the W221 fuel pump wire harness?\u003c\/h4\u003e\n\u003cp\u003eA: The harness is designed for direct plug-in fitment, matching the original connector positions on your W221 fuel tank. Basic automotive knowledge and tools are required. Always disconnect the battery and follow proper fuel system safety precautions. If in doubt, we recommend professional installation by a qualified mechanic.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What material is the wiring harness made from?\u003c\/h4\u003e\n\u003cp\u003eA: The harness incorporates stainless steel components, chosen for their corrosion resistance and durability in the demanding under-vehicle fuel tank environment.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which Mercedes-Benz models is this W221 fuel pump wiring harness compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This fuel tank wiring harness is designed to fit the Mercedes-Benz W221 S-Class platform, specifically the S300, S350, S400, and S500 model variants. Please verify your chassis and model year before ordering to ensure correct fitment.\"}}, {\"@type\": \"Question\", \"name\": \"Is this a direct OEM replacement or an upgraded aftermarket wiring harness?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This is an improved aftermarket wiring harness. It is engineered to match the original connector locations for plug-and-play installation, while featuring upgraded materials — including stainless steel hardware — for improved durability and connection reliability compared to the factory original.\"}}, {\"@type\": \"Question\", \"name\": \"How difficult is it to install the W221 fuel pump wire harness?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The harness is designed for direct plug-in fitment, matching the original connector positions on your W221 fuel tank. Basic automotive knowledge and tools are required. Always disconnect the battery and follow proper fuel system safety precautions. If in doubt, we recommend professional installation by a qualified mechanic.\"}}, {\"@type\": \"Question\", \"name\": \"What material is the wiring harness made from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The harness incorporates stainless steel components, chosen for their corrosion resistance and durability in the demanding under-vehicle fuel tank environment.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Car \u0026 Auto\", \"item\": \"https:\/\/oasis-select.com\/collections\/car-auto\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Mercedes W221 Fuel Pump Wiring Harness – S300 S350 S400 S500\", \"item\": \"https:\/\/oasis-select.com\/products\/mercedes-w221-fuel-tank-wiring-harness-s300-s350-s400-s500\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"229002 new","offer_id":47744982024297,"sku":"14:371#229002 new","price":238.48,"currency_code":"USD","in_stock":true},{"title":"229001 old model","offer_id":47744982057065,"sku":"14:115#229001 old model","price":238.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S877e36543a59439085e6fe86c9452819l.webp?v=1783029436","url":"https:\/\/oasis-select.com\/products\/mercedes-w221-fuel-tank-wiring-harness-s300-s350-s400-s500","provider":"Oasis Select","version":"1.0","type":"link"}