{"nhtsa_id":10051992,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2013-04-29","date":"2013-02-01","document_id":"SC-2013010001","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY; ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"MERCEDES: DUE TO LEFT AND RIGHT SECONDARY CHAIN TENSIONERS, OF THE CHECK VALVE, BEING INSTALLED AND PRESSED DEEPLY INTO CYLINDER HEADS, THE OIL SUPPLY CAN NOT BE ENSURED FOR CYLINDER HEAD, AND CHECK VALVE, OF LEFT AND RIGHT SECONDARY CHAIN TENSIONERS, MUST BE REMOVED. MODELS 2013 207(E350, 550), 212 (E350, 550, 63), 218 (CLS550, 63), 221(S550, 600, 65, 63, 400, 450, 350), 231 (SL). *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10051992","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"},{"id":"radiator","name":"Radiator","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES BENZ","model":"SL-CLASS","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_mercedes-benz_sl-class"]},{"make":"MERCEDES-BENZ","model":"E350","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S550","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}