{"product_id":"07-14-mercedes-w221-s400-cl550-ism-dsm-gearbox-transmission-control-unit-tcu-oem","title":"07-14 Mercedes W221 S400 CL550 ISM DSM Gearbox Transmission Control Unit TCU Oem","description":"\u003cp\u003eOEM transmission control unit (TCU) for 2007-2014 Mercedes-Benz W221 S-Class and CL-Class models with ISM\/DSM automatic gearbox. This factory part manages shift timing, torque converter lock-up, and transmission diagnostics to ensure smooth, reliable gear changes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eKey Specs:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits: S400, S550, CL550 (W221 chassis)\u003c\/li\u003e\n\u003cli\u003eOEM Mercedes component—direct replacement quality\u003c\/li\u003e\n\u003cli\u003eControls 7-speed automatic transmission\u003c\/li\u003e\n\u003cli\u003eFully tested and functional\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDirect swap replacement—no reprogramming required if replacing a faulty unit with same part number.\u003c\/p\u003e","brand":"eBay Import","offers":[{"title":"Default Title","offer_id":45394919096422,"sku":null,"price":511.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/4630\/9734\/files\/s-l100_ee0e663a-6ff0-4aee-807e-c45e99883f46.jpg?v=1775287945","url":"https:\/\/findmypart.shop\/products\/07-14-mercedes-w221-s400-cl550-ism-dsm-gearbox-transmission-control-unit-tcu-oem","provider":"Find My Part","version":"1.0","type":"link"}