# Service bulletin LI27.35\-P\-080160 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: 11026833 - Published by NHTSA: 2025\-12\-24 - Manufacturer's number: LI27.35\-P\-080160 - Manufacturer's date: 2025\-12\-20 - NHTSA component: POWER TRAIN ## NHTSA's summary Complaint \(Original LI document \#: LI27.35\-P\-079039\) Clicking noises from the electro\-hydraulic control unit \(EHS\) when the vehicle is stationary and ECO Start/Stop is active \(combustion engine is off\). The noise is more noticeable outside the vehicle and in acoustically shielded areas such as closed rooms or garages. Cause The noise in the valve body \(EHS\) is caused by superimposed pressure peaks acting on the valves. This phenomenon occurs only after a certain running\-in period due to the influence of micro\-contamination in the valve bores. Remedy A hardware modification of the electro\-hydraulic control unit \(EHS\) is currently being implemented \(no change to the part number\). This will be incorporated into series production and as a spare part starting from 12/2025. This is only a comfort\-related complaint and has no impact on the functionality or service life of the transmission. For sensitive customers, the following measures can be performed: 1. Replace the electro\-hydraulic control unit \(EHS\), the oil pan, and the transmission fluid. \- Ensure all oil guide pipes are installed in the new valve body to prevent a new concern after replacement. \(See attached location guide\) ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026833-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026833-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Transmission and driveline ## Vehicles listed - 2018 MERCEDES BENZ C 300 4MATIC - 2016 to 2024 MERCEDES\-BENZ AMG C43 - 2023 to 2026 MERCEDES\-BENZ AMG C43 4MATIC - 2019 to 2021 MERCEDES\-BENZ AMG C63 - 2019 to 2021 MERCEDES\-BENZ AMG C63 S - 2023 MERCEDES\-BENZ AMG C63 S - 2023 MERCEDES\-BENZ AMG C63 S E - 2019 to 2021 MERCEDES\-BENZ AMG CLS53 - 2017 to 2018 MERCEDES\-BENZ AMG E43 - 2019 to 2023 MERCEDES\-BENZ AMG E53 - 2018 MERCEDES\-BENZ AMG E63 - 2018 MERCEDES\-BENZ AMG E63S - 2019 to 2025 MERCEDES\-BENZ AMG G63 - 2017 to 2024 MERCEDES\-BENZ AMG GLC43 - 2024 to 2026 MERCEDES\-BENZ AMG GLC43 4MATIC - 2024 to 2025 MERCEDES\-BENZ AMG GLC43 4MATIC COUPE - 2018 to 2022 MERCEDES\-BENZ AMG GLC63 - 2020 to 2023 MERCEDES\-BENZ AMG GLC63 S - 2018 to 2019 MERCEDES\-BENZ AMG GLC63S - 2016 to 2020 MERCEDES\-BENZ AMG GLE43 - 2021 to 2022 MERCEDES\-BENZ AMG GLE53 - 2023 to 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+ - 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+ COUPE - 2020 to 2024 MERCEDES\-BENZ AMG GLE63 - 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S - 2023 to 2024 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ - 2025 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ COUPE - 2020 to 2022 MERCEDES\-BENZ AMG GLS63 - 2026 MERCEDES\-BENZ AMG GLS63 - 2023 to 2025 MERCEDES\-BENZ AMG GLS63 4MATIC\+ - 2023 MERCEDES\-BENZ AMG GT 63 S E COUPE - 2020 to 2026 MERCEDES\-BENZ AMG GT43 - 2019 to 2023 MERCEDES\-BENZ AMG GT53 - 2019 to 2026 MERCEDES\-BENZ AMG GT63 - 2025 to 2026 MERCEDES\-BENZ AMG GT63 4MATIC\+ - 2025 to 2026 MERCEDES\-BENZ AMG GT63 PRO 4MATIC\+ - 2022 to 2023 MERCEDES\-BENZ AMG GT63 S - 2024 to 2025 MERCEDES\-BENZ AMG GT63 S E - 2024 MERCEDES\-BENZ AMG GT63 S E PERFORMANCE - 2025 to 2026 MERCEDES\-BENZ AMG GT63 S E PERFORMANCE 4MATIC\+ - 2019 to 2021 MERCEDES\-BENZ AMG GT63S - 2023 to 2025 MERCEDES\-BENZ AMG S 63 E 4MATIC\+ - 2017 to 2021 MERCEDES\-BENZ AMG S63 - 2022 to 2023 MERCEDES\-BENZ AMG SL63 - 2025 MERCEDES\-BENZ AMG SL63 - 2023 to 2026 MERCEDES\-BENZ AMG SL63 4MATIC\+ - 2024 to 2025 MERCEDES\-BENZ AMG SL63 S E - 2024 to 2026 MERCEDES\-BENZ AMG SL63 S E PERFORMANCE 4MATIC\+ - 2017 to 2020 MERCEDES\-BENZ AMG SLC43 - 2017 to 2026 MERCEDES\-BENZ C 300 - 2021 to 2026 MERCEDES\-BENZ C 300 4MATIC - 2019 to 2020 MERCEDES\-BENZ C 350 E - 2016 to 2017 MERCEDES\-BENZ C450 - 2019 to 2022 MERCEDES\-BENZ CLS 450 - 2016 MERCEDES\-BENZ CLS 550 - 2018 MERCEDES\-BENZ CLS 550 - 2015 MERCEDES\-BENZ CLS550 - 2017 MERCEDES\-BENZ CLS550 - 2018 to 2019 MERCEDES\-BENZ E 300 - 2020 to 2026 MERCEDES\-BENZ E 350 - 2024 to 2026 MERCEDES\-BENZ E 350 4MATIC - 2018 MERCEDES\-BENZ E 400 - 2019 to 2024 MERCEDES\-BENZ E 450 - 2024 to 2026 MERCEDES\-BENZ E 450 4MATIC - 2016 to 2017 MERCEDES\-BENZ E300 - 2016 to 2017 MERCEDES\-BENZ E400 - 2019 to 2025 MERCEDES\-BENZ G 550 - 2017 MERCEDES\-BENZ GL350 - 2017 MERCEDES\-BENZ GL550 - 2018 to 2023 MERCEDES\-BENZ GLC 300 - 2023 to 2024 MERCEDES\-BENZ GLC 300 4MATIC - 2020 to 2021 MERCEDES\-BENZ GLC 350 E - 2016 to 2017 MERCEDES\-BENZ GLC300 - 2026 MERCEDES\-BENZ GLC43 4MATIC COUPE - 2018 MERCEDES\-BENZ GLE 350 - 2020 to 2024 MERCEDES\-BENZ GLE 350 - 2024 to 2026 MERCEDES\-BENZ GLE 350 4MATIC - 2020 to 2021 MERCEDES\-BENZ GLE 350 E - 2018 to 2019 MERCEDES\-BENZ GLE 400 - 2020 to 2024 MERCEDES\-BENZ GLE 450 - 2025 to 2026 MERCEDES\-BENZ GLE 450 4MATIC - 2025 MERCEDES\-BENZ GLE 450 4MATIC COUPE - 2024 to 2025 MERCEDES\-BENZ GLE 450E 4MATIC - 2020 to 2021 MERCEDES\-BENZ GLE 580 - 2022 to 2024 MERCEDES\-BENZ GLE 580 4MATIC - 2016 MERCEDES\-BENZ GLE350D - 2016 to 2017 MERCEDES\-BENZ GLE400 - 2016 to 2017 MERCEDES\-BENZ GLE450 - 2018 to 2020 MERCEDES\-BENZ GLS 450 - 2022 to 2025 MERCEDES\-BENZ GLS 450 4MATIC - 2018 to 2019 MERCEDES\-BENZ GLS 550 - 2020 MERCEDES\-BENZ GLS 580 4MATIC - 2022 to 2025 MERCEDES\-BENZ GLS 580 4MATIC - 2023 MERCEDES\-BENZ GLS 600 - 2017 MERCEDES\-BENZ GLS350D - 2017 MERCEDES\-BENZ GLS450 - 2021 MERCEDES\-BENZ GLS450 - 2017 MERCEDES\-BENZ GLS550 - 2021 MERCEDES\-BENZ GLS580 - 2015 MERCEDES\-BENZ ML350 - 2018 to 2020 MERCEDES\-BENZ S 450 - 2021 MERCEDES\-BENZ S 500 - 2023 MERCEDES\-BENZ S 500 - 2022 to 2025 MERCEDES\-BENZ S 500 4MATIC - 2020 MERCEDES\-BENZ S 550 - 2021 MERCEDES\-BENZ S 560 - 2019 to 2020 MERCEDES\-BENZ S 560 E - 2021 MERCEDES\-BENZ S 580 - 2023 MERCEDES\-BENZ S 580 - 2022 to 2025 MERCEDES\-BENZ S 580 4MATIC - 2023 MERCEDES\-BENZ S 580 E - 2023 to 2025 MERCEDES\-BENZ S 580 E 4MATIC - 2016 to 2017 MERCEDES\-BENZ S550 - 2016 to 2017 MERCEDES\-BENZ S550 4MATIC - 2017 MERCEDES\-BENZ S550E - 2017 MERCEDES\-BENZ S63 - 2018 to 2020 MERCEDES\-BENZ SL 450 - 2018 to 2020 MERCEDES\-BENZ SL 550 - 2017 MERCEDES\-BENZ SL450 - 2017 MERCEDES\-BENZ SL550 - 2018 to 2020 MERCEDES\-BENZ SLC 300 - 2017 MERCEDES\-BENZ SLC 43 AMG - 2016 to 2017 MERCEDES\-BENZ SLC300 - 2016 MERCEDES\-BENZ SLK300 - 2021 MERCEDES\-MAYBACH GLS 600 - 2022 to 2025 MERCEDES\-MAYBACH GLS 600 4MATIC - 2018 to 2020 MERCEDES\-MAYBACH S 560 4MATIC - 2021 MERCEDES\-MAYBACH S 580 - 2022 to 2025 MERCEDES\-MAYBACH S 580 4MATIC - 2023 to 2024 MERCEDES\-MAYBACH S 680 - 2022 to 2023 MERCEDES\-MAYBACH S 680 4MATIC - 2025 MERCEDES\-MAYBACH S 680 4MATIC - 2017 MERCEDES\-MAYBACH S550 JSON: [/v1/bulletins/11026833](/v1/bulletins/11026833) [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%20LI27.35-P-080160&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11026833&vehicle=Service%20bulletin%20LI27.35-P-080160)