{"nhtsa_id":10167021,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-11-04","date":"2014-02-14","document_id":"LI68.10-P-055925","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:APPLIANCE:AIR CONDITIONER","mfr_system":null,"summary":"Crackling noises from air vents (round vents) in event of severe temperature fluctuations in the blower","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10167021-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10167021-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10167021","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"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":[]}