{"nhtsa_id":602388,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-11-03","date":"1998-07-07","document_id":"1998040001","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE","mfr_system":null,"summary":"PROVIDED INFORMATION ON THE PROCEDURE TO ADD AN O-RING TO THE HEATER RETURN HOSE RETAINING CLIP(MODEL 163.154). *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/602388","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES BENZ","model":"163","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"MERCEDES BENZ","model":"ML320","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":[]}