{"nhtsa_id":11003210,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-07-04","date":"2024-06-11","document_id":"LI54.10-P-076820","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Complaint In the instrument cluster, the symbol for \"12 V battery\" and the message \"Switch on vehicle\" may sporadically be displayed. As a consequence of this, the fault codes B1FCB97 (=> N73/3) and U116000 (=> N73/3*1) are stored in the fault memory. In the subsequent analysis of the 12 V on-board electrical system data, the following parameters are noteworthy (see picture 1 in the attachment): • Charge balance negative when stationary. • Interior CAN bus is awake for an unusually long time while the vehicle was locked. • 12 V battery SOC (state of charge) during subsequent engine start is 45% or less. NOTE: This LI does not apply if the CEL was reported as being on without a 12V message. Once the 12 V battery SOC has exceeded 50% for the first time, the symbol and the message in the instrument cluster disappear again. Cause The door control unit (N69/x) may sporadically keep the interior CAN bus awake. Remedy Update the software and coding on all 4 door control units (N69/1, N69/2, N69/3 and N69/4): • To do so, a commissioning process must be started in the door control unit, left-hand front door (N69/1). The remaining door control units (N69/2, N69/3 and N69/4) are commissioned at the same time, in an automated process.( Path: Xentry Scope; Control Units View; TSG-XX (N69/1); Adaptations; Commissioning) • The repair software has been available since 02.02.2024 and the new SCN coding since 04.06.2024. • The measures are only 100% effective if the combination of \"Repair software + new SCN coding\" is used. SW item numbers of the repair software: • A2069020310 for the door control units on the front doors (N69/1 and N69/2) • A2069020410 for the door control units on the rear doors (N69/3 and N69/4)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11003210-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11003210-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11003210","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["B1FCB","U1160"],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"AMG C43","year_from":2022,"year_to":2023,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"C 300","year_from":2022,"year_to":2023,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"GLC 300","year_from":2023,"year_to":2023,"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":[]}