{"product_id":"cloyes-c551-engine-timing-chain-left-upper","title":"Cloyes C551 Engine Timing Chain - Left Upper","description":"\u003ch2\u003eEngine Timing Chain Overview\u003c\/h2\u003e\u003cp\u003eThe Cloyes C551 engine timing chain is built for precise crankshaft and camshaft synchronization in Mercedes-Benz applications. It is engineered for accurate valve timing, quiet operation, and OE-level performance in service.\u003c\/p\u003e\u003cp\u003eFits 2012-2020 Mercedes-Benz models in the left upper engine timing chain position, including SL550, SL63 AMG, GLE63 AMG, GLS550, CLS550, E550, S550, and related applications. The C551 timing chain is a direct service part for timing system repair on these vehicles.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePremium-material construction for timing system durability.\u003c\/li\u003e\n\u003cli\u003eHeat-treated and pre-stressed for stable chain performance.\u003c\/li\u003e\n\u003cli\u003eEngineered for accurate tooth engagement with sprockets.\u003c\/li\u003e\n\u003cli\u003eSupports quiet operation and consistent valve timing.\u003c\/li\u003e\n\u003cli\u003eCloyes timing chain design backed by more than a century of timing-system experience.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eCloyes C551 is part of the Engine Timing Chain line and is intended for Mercedes-Benz engines that require precise timing control. This chain helps maintain synchronization between the crankshaft and camshaft, which is critical for smooth engine operation and long-term performance. It fits 2012-2020 Mercedes-Benz SL550, 2012-2017 Mercedes-Benz S550, and other listed Mercedes-Benz models in the left upper position. The C551 part number is also useful when cross-referencing timing service needs, and this part cross-references 2780503716 for the same application.\u003c\/p\u003e\u003cp\u003eCloyes recommends servicing the full timing system during repair, including the chain, tensioners, guides, and sprockets, to maintain timing integrity. The C551 timing chain reflects Cloyes' focus on OE-level fit and timing accuracy for Mercedes-Benz engine service.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Fix\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTiming chain stretch that affects camshaft synchronization.\u003c\/li\u003e\n\u003cli\u003eExcessive timing noise from worn chain components.\u003c\/li\u003e\n\u003cli\u003eValve timing irregularities that can affect engine operation.\u003c\/li\u003e\n\u003cli\u003eTiming system wear during high-mileage service intervals.\u003c\/li\u003e\n\u003cli\u003eRepair needs on Mercedes-Benz engines with left upper chain placement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify engine code and timing system configuration before installation. Cloyes recommends replacing the chain together with the tensioners, guides, and sprockets during timing service. Confirm the left upper fitment listed for your Mercedes-Benz application before ordering.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eCloyes has supplied automotive timing systems since 1921, and the C551 is manufactured to support OE-level performance standards. The brand states this timing chain is backed by an industry-leading warranty and technical support.\u003c\/p\u003e","brand":"Cloyes","offers":[{"title":"Default Title","offer_id":53556031029429,"sku":"BBKX-C551","price":153.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/CT_C551_FRO.jpg?v=1792391307","url":"https:\/\/www.partcatalog.com\/products\/cloyes-c551-engine-timing-chain-left-upper","provider":"PartCatalog","version":"1.0","type":"link"}