{"nhtsa_id":11028662,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-10","date":"2026-02-10","document_id":"LI83.20-P-079911","mfr_campaign":null,"replaces":null,"component":"STRUCTURE:BODY; 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 Perform the following steps: 1. Compare the noise with the attached example. If the noise matches the example, proceed to step 2; otherwise, create a TIPS case. 2. Check whether SNR A1748354600 is installed. (Quick test → N33/16 → Hardware): If SNR A1748354600 is installed, proceed to step 3; otherwise, create a TIPS case. 3. Hardware replacement of the HV-PTC N33/16 air heater – install a new part with the current item number as per XPPI.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028662-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028662-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028662","components":[{"id":"structure-body","name":"Body and frame","parent":null},{"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":[]}