{"product_id":"mercedes-benz-w204-w212-8-piece-front-window-regulator-repair-kit","title":"Mercedes-Benz W204 (C300\/C350) \u0026 W212 (E350) 8-Piece Front Window Regulator Repair Kit","description":"\u003ch2\u003eMercedes-Benz W204 (C300\/C350) \u0026amp; W212 (E350) 8-Piece Front Window Regulator Repair Kit\u003c\/h2\u003e\n\u003cp\u003eThis is an 8-piece electric \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Power_window\"\u003ewindow regulator\u003c\/a\u003e repair kit, cross-referenced to OE numbers A2127201679 and A2127201579, built for the W204-chassis Mercedes-Benz C300 and C350 (2008-2014) and the W212-chassis E350 (2010-2015), front driver or passenger side. If your window has started dropping unexpectedly, moving slowly, or making grinding noises as it goes up or down, a worn regulator mechanism is a well-known issue on these Mercedes-Benz models.\u003c\/p\u003e\n\n\u003ch2\u003eWhy a Repair Kit Instead of a Full Regulator Assembly\u003c\/h2\u003e\n\u003cp\u003eOn many of these Mercedes-Benz window regulators, it's the plastic components inside the mechanism, not the electric motor itself, that wear out and fail over time, since the motor is generally built to last far longer than the smaller moving parts around it. This repair kit replaces those specific wear components rather than the entire regulator and motor assembly, which is why it's offered as an 8-piece kit rather than a single bolt-in part, and why it typically costs less than replacing the full assembly.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCross-referenced to OE numbers A2127201679 and A2127201579\u003c\/li\u003e\n\u003cli\u003eComplete 8-piece kit for a full regulator mechanism repair\u003c\/li\u003e\n\u003cli\u003eFits both driver and passenger side, front position\u003c\/li\u003e\n\u003cli\u003eDurable construction designed for long-lasting performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eType: Window regulator repair kit\u003c\/li\u003e\n\u003cli\u003eOperating mode: Electric\u003c\/li\u003e\n\u003cli\u003eOE numbers: A2127201679, A2127201579\u003c\/li\u003e\n\u003cli\u003ePlacement: Front, driver or passenger side\u003c\/li\u003e\n\u003cli\u003eNumber of pieces: 8\u003c\/li\u003e\n\u003cli\u003eManufacturer warranty: 1 year\u003c\/li\u003e\n\u003cli\u003eCondition: New\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFits the W204-chassis Mercedes-Benz C300 and C350 (2008-2014) and the W212-chassis E350 (2010-2015), front window position. Because Mercedes-Benz updated components across production runs, it's worth confirming the OE numbers above against your original regulator or reaching out with your VIN before ordering to help guarantee a correct fit.\u003c\/p\u003e\n\n\u003ch2\u003eSigns Your Window Regulator Needs Repair\u003c\/h2\u003e\n\u003cp\u003eA window that drops suddenly, moves noticeably slower than it used to, gets stuck partway, or makes a grinding or clicking noise during operation are all common signs of a worn regulator mechanism. Because a failing regulator can eventually leave your window stuck in the down position, addressing these symptoms before a complete failure helps avoid being left with an open window in bad weather, or having your vehicle vulnerable to break-ins with a window that won't fully close.\u003c\/p\u003e\n\n\u003ch2\u003eWhy This Is a Common Repair on These Models\u003c\/h2\u003e\n\u003cp\u003eThe plastic components inside these regulator mechanisms are a known wear point on this generation of C-Class and E-Class vehicles, which is why a repair kit specifically addressing these parts is widely available rather than requiring a full assembly replacement. Repairing the worn components directly addresses the root cause rather than replacing parts of the mechanism that are typically still functioning fine, which is also why this kit tends to be the more cost-effective route for most owners facing this issue.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eInstalling this kit means removing the interior door panel to access the regulator mechanism, carefully supporting the window glass, replacing the worn components with the new kit pieces, and reassembling the mechanism before testing window operation. Because supporting the glass properly during this process is essential to avoid it falling and breaking, having an extra set of hands or a proper support tool makes this job considerably safer. Working slowly and testing the window's movement at each stage of reassembly also helps catch a misaligned component before the door panel goes back on.\u003c\/p\u003e\n\n\u003ch2\u003eOrdering Information\u003c\/h2\u003e\n\u003cp\u003eThis window regulator repair kit is in stock and ships ready to install. Our \u003ca href=\"\/pages\/shipping\"\u003eShipping Information\u003c\/a\u003e page covers current timelines, and our \u003ca href=\"\/pages\/warranty\"\u003eWarranty\u003c\/a\u003e and \u003ca href=\"\/pages\/returns\"\u003eReturns\u003c\/a\u003e pages explain what to do if anything isn't right on arrival. Not sure this matches your specific Mercedes-Benz and chassis? Our \u003ca href=\"\/pages\/request-a-part\"\u003eRequest a Part page\u003c\/a\u003e is the fastest way to confirm before you order.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cp\u003eThis window regulator repair kit is listed in our \u003ca href=\"\/collections\/mercedes-benz\"\u003eMercedes-Benz\u003c\/a\u003e collection, along with our \u003ca href=\"\/collections\/electrical-parts\"\u003eElectrical Parts\u003c\/a\u003e collection, where you'll find other window and electrical components.\u003c\/p\u003e\n","brand":"EasyLife Auto Parts","offers":[{"title":"See image","offer_id":49818790691044,"sku":"CJQT270201501AZ","price":39.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/0502\/0900\/files\/0a825133-b967-45f3-867a-8b4e0df7563a.jpg?v=1788843931","url":"https:\/\/easylifeautoparts.com\/products\/mercedes-benz-w204-w212-8-piece-front-window-regulator-repair-kit","provider":"Easy Life Auto Parts","version":"1.0","type":"link"}