{"nhtsa_id":11024407,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-10-21","date":"2025-10-20","document_id":"LI83.20-P-079911","mfr_campaign":null,"replaces":null,"component":"VISIBILITY/WIPER","mfr_system":null,"summary":"Complaint High-frequency cheeping or ticking when heating is requested in the instrument panel area. Cause Variable switching frequencies in the high-voltage on-board electrical system can cause vibrations that lead to noise complaints on the HV-PTC N33/16 (air heater). Remedy Note: Replacing the hardware does not solve the problem at present! Modified hardware for the HV-PTC (air heater) will be available from the beginning of 2026.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11024407-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11024407-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11024407","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"wiper","name":"Wipers and washers","parent":"visibility"}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"CLA 250+ (EV)","year_from":2026,"year_to":2026,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CLA 350 4MATIC (EV)","year_from":2026,"year_to":2026,"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":[]}