{"nhtsa_id":609074,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-12-08","date":"1999-08-01","document_id":"142013","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)","mfr_system":null,"summary":"PROCEDURES FOR AN EGR VACCUM TRANSDUCER IN-CAR CHARACTERISTIC CURVE TEST, INTERNAL LEAK TEST, AND EXTERNAL LEAK TEST FOR ALL DIESEL MODELS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/609074","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"egr-valve","name":"EGR valve","parent":"exhaust-emissions"}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES BENZ","model":"MERCEDES BENZ","year_from":null,"year_to":null,"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":[]}