# Service bulletin NCU\-OTAcommNoMMC 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. - Type: Service bulletin - NHTSA id: 10249726 - Published by NHTSA: 2024\-02\-06 - Manufacturer's number: NCU\-OTAcommNoMMC - Manufacturer's date: 2024\-01\-18 - NHTSA component: ELECTRICAL SYSTEM ## NHTSA's summary Mercedes\-Benz AG \(“MBAG”\), the manufacturer of Mercedes\-Benz, has determined that in certain MY 2017\-2021 C\-Class, CLA, CLS, E\-Class, GLC, GLE, GLS, AMG GT, S\-Class, SL, and SLC \(205, 117, 257, 213/238, 253, 166/292, 190/290,217/222, 231, 172\) vehicles, the software of the communication module does not correspond with the latest series production configuration. This free of charge update includes quality\-enhancing optimizations for the communication module to improve the system stability and better availability of the Mercedes me services. The update is downloaded and installed in the background. This process takes approx. 15 minutes. During the installation, the system can be used without restrictions. The new software will be active after the vehicle has been switched off. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge without an additional workshop visit via the data link of the communication module. All customers will be mailed a letter informing them of this software update. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249726-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249726-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system ## Vehicles listed - 2018 MERCEDES BENZ C 300 4MATIC - 2017 to 2021 MERCEDES\-BENZ AMG C43 - 2017 to 2021 MERCEDES\-BENZ AMG C63 - 2019 to 2021 MERCEDES\-BENZ AMG C63 S - 2017 to 2018 MERCEDES\-BENZ AMG C63S - 2020 to 2021 MERCEDES\-BENZ AMG CLA35 - 2017 to 2021 MERCEDES\-BENZ AMG CLA45 - 2019 to 2021 MERCEDES\-BENZ AMG CLS53 - 2017 to 2018 MERCEDES\-BENZ AMG CLS63 - 2017 to 2018 MERCEDES\-BENZ AMG E43 - 2019 to 2021 MERCEDES\-BENZ AMG E53 - 2018 to 2021 MERCEDES\-BENZ AMG E63 - 2018 to 2021 MERCEDES\-BENZ AMG E63S - 2017 to 2021 MERCEDES\-BENZ AMG GLC43 - 2018 to 2021 MERCEDES\-BENZ AMG GLC63 - 2020 to 2021 MERCEDES\-BENZ AMG GLC63 S - 2018 to 2019 MERCEDES\-BENZ AMG GLC63S - 2017 to 2021 MERCEDES\-BENZ AMG GLE43 - 2021 MERCEDES\-BENZ AMG GLE53 - 2017 to 2021 MERCEDES\-BENZ AMG GLE63 - 2021 MERCEDES\-BENZ AMG GLE63 S - 2018 MERCEDES\-BENZ AMG GLE63S - 2017 to 2021 MERCEDES\-BENZ AMG GLS63 - 2017 to 2021 MERCEDES\-BENZ AMG GT - 2019 to 2020 MERCEDES\-BENZ AMG GT 63 - 2018 to 2021 MERCEDES\-BENZ AMG GT C - 2017 MERCEDES\-BENZ AMG GT C ROADSTER - 2018 to 2020 MERCEDES\-BENZ AMG GT R - 2018 MERCEDES\-BENZ AMG GT ROADSTER - 2017 to 2020 MERCEDES\-BENZ AMG GT S - 2020 to 2021 MERCEDES\-BENZ AMG GT43 - 2019 to 2021 MERCEDES\-BENZ AMG GT53 - 2019 to 2021 MERCEDES\-BENZ AMG GT63 - 2019 to 2021 MERCEDES\-BENZ AMG GT63S - 2018 MERCEDES\-BENZ AMG GTA - 2017 to 2021 MERCEDES\-BENZ AMG S63 - 2017 to 2020 MERCEDES\-BENZ AMG S65 - 2018 to 2020 MERCEDES\-BENZ AMG SL63 - 2017 to 2019 MERCEDES\-BENZ AMG SL65 - 2019 MERCEDES\-BENZ AMG SLC 43 - 2017 to 2020 MERCEDES\-BENZ AMG SLC43 - 2017 to 2021 MERCEDES\-BENZ C 300 - 2020 MERCEDES\-BENZ C 350 - 2018 to 2020 MERCEDES\-BENZ C 350 E - 2017 MERCEDES\-BENZ C350 - 2017 MERCEDES\-BENZ C350E - 2017 MERCEDES\-BENZ C450 - 2018 to 2019 MERCEDES\-BENZ CLA 250 - 2021 MERCEDES\-BENZ CLA 250 - 2017 MERCEDES\-BENZ CLA250 - 2019 to 2021 MERCEDES\-BENZ CLS 450 - 2018 MERCEDES\-BENZ CLS 550 - 2017 MERCEDES\-BENZ CLS550 - 2018 to 2019 MERCEDES\-BENZ E 300 - 2020 to 2021 MERCEDES\-BENZ E 350 - 2018 MERCEDES\-BENZ E 400 - 2019 to 2021 MERCEDES\-BENZ E 450 - 2017 MERCEDES\-BENZ E300 - 2017 MERCEDES\-BENZ E350 - 2017 MERCEDES\-BENZ E400 - 2018 MERCEDES\-BENZ E43 AMG - 2017 MERCEDES\-BENZ E550 - 2019 MERCEDES\-BENZ E63 - 2020 MERCEDES\-BENZ E63 AMG - 2018 to 2019 MERCEDES\-BENZ E63S - 2018 to 2021 MERCEDES\-BENZ GLC 300 - 2018 to 2020 MERCEDES\-BENZ GLC 350 - 2018 MERCEDES\-BENZ GLC 350 E - 2020 to 2021 MERCEDES\-BENZ GLC 350 E - 2017 MERCEDES\-BENZ GLC300 - 2019 MERCEDES\-BENZ GLC350E - 2018 to 2021 MERCEDES\-BENZ GLE 350 - 2020 to 2021 MERCEDES\-BENZ GLE 350 E - 2018 to 2019 MERCEDES\-BENZ GLE 400 - 2021 MERCEDES\-BENZ GLE 400 E - 2020 to 2021 MERCEDES\-BENZ GLE 450 - 2018 to 2019 MERCEDES\-BENZ GLE 550 E - 2020 to 2021 MERCEDES\-BENZ GLE 580 - 2017 MERCEDES\-BENZ GLE300D - 2017 MERCEDES\-BENZ GLE350 - 2017 MERCEDES\-BENZ GLE400 - 2017 MERCEDES\-BENZ GLE450 - 2017 MERCEDES\-BENZ GLE550 - 2017 MERCEDES\-BENZ GLE550E - 2017 MERCEDES\-BENZ GLE63S - 2018 to 2020 MERCEDES\-BENZ GLS 450 - 2018 to 2019 MERCEDES\-BENZ GLS 550 - 2020 MERCEDES\-BENZ GLS 580 4MATIC - 2017 MERCEDES\-BENZ GLS350D - 2017 MERCEDES\-BENZ GLS450 - 2021 MERCEDES\-BENZ GLS450 - 2017 MERCEDES\-BENZ GLS550 - 2021 MERCEDES\-BENZ GLS580 - 2021 MERCEDES\-BENZ MAYBACH GLS600 - 2018 to 2020 MERCEDES\-BENZ S 450 - 2021 MERCEDES\-BENZ S 500 - 2018 to 2020 MERCEDES\-BENZ S 550 - 2021 MERCEDES\-BENZ S 560 - 2019 to 2020 MERCEDES\-BENZ S 560 E - 2021 MERCEDES\-BENZ S 580 - 2017 MERCEDES\-BENZ S550 - 2017 MERCEDES\-BENZ S550 4MATIC - 2017 MERCEDES\-BENZ S550E - 2017 MERCEDES\-BENZ S600 - 2017 to 2018 MERCEDES\-BENZ S63 - 2017 MERCEDES\-BENZ S65 AMG - 2017 MERCEDES\-BENZ S650 - 2018 to 2020 MERCEDES\-BENZ SL 450 - 2018 to 2020 MERCEDES\-BENZ SL 550 - 2017 MERCEDES\-BENZ SL450 - 2017 MERCEDES\-BENZ SL550 - 2017 MERCEDES\-BENZ SL63 - 2018 to 2020 MERCEDES\-BENZ SLC 300 - 2017 to 2018 MERCEDES\-BENZ SLC 43 AMG - 2017 MERCEDES\-BENZ SLC300 - 2021 MERCEDES\-MAYBACH GLS 600 - 2021 MERCEDES\-MAYBACH S 560 - 2018 to 2020 MERCEDES\-MAYBACH S 560 4MATIC - 2021 MERCEDES\-MAYBACH S 580 - 2018 to 2020 MERCEDES\-MAYBACH S 650 - 2017 MERCEDES\-MAYBACH S550 - 2017 MERCEDES\-MAYBACH S600 - 2017 MERCEDES\-MAYBACH S650 JSON: [/v1/bulletins/10249726](/v1/bulletins/10249726) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20NCU-OTAcommNoMMC&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10249726&vehicle=Service%20bulletin%20NCU-OTAcommNoMMC)