# Service bulletin LI82.70\-P\-077433 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: 11008091 - Published by NHTSA: 2024\-09\-28 - Manufacturer's number: LI82.70\-P\-077433 - Manufacturer's date: 2024\-09\-28 - NHTSA component: ELECTRICAL SYSTEM ## NHTSA's summary Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly difficult to understand as the speed rises. Cause A. Seating of the microphones in the headliner. Side edges are covered by the textile cover \(see picture "1"\) B. Assembly of microphones \(B25/20 or B25/21\) in the headliner. C. Dirt inside the microphone housing Remedy 1. Press finger on rear of microphone \(on adhesive tape\) 2. Remove microphone cap from the front 3. Eliminate protruding material residues of the microphone cutout at the headliner, e.g. with a soldering iron. The microphone must be seated in the headliner as shown in picture "2". 4. Push microphone from behind until it is firmly pressed into the headliner 5. Maintain pressure and press/clip cap into microphone from the front. Note: The cover cap must be clearly heard and felt to engage. 6. This procedure must be carried out on both microphones \(B25/20 and B25/21\) Note: • It is recommended to replace the cover caps. • The non\-woven cloth in the cover cap protects the microphone from soiling and must not be removed. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes\-Benz vehicles, using Mercedes\-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case\-by\-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008091-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008091-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system ## Vehicles listed - 2004 to 2012 MAYBACH MAYBACH - 2020 to 2021 MERCEDES EQA - 2005 MERCEDES BENZ 211 - 2018 MERCEDES BENZ A 220 - 2007 MERCEDES BENZ A170 - 2008 MERCEDES BENZ AMG CLK63 - 2007 MERCEDES BENZ AMG R63 - 2014 to 2016 MERCEDES BENZ B\-CLASS ELECTRIC - 2018 MERCEDES BENZ C 300 4MATIC - 2000 to 2007 MERCEDES BENZ C230 - 2001 to 2007 MERCEDES BENZ C240 - 2000 MERCEDES BENZ C280 - 2005 to 2007 MERCEDES BENZ C280 - 2008 to 2009 MERCEDES BENZ C300 - 2001 to 2007 MERCEDES BENZ C320 - 2006 to 2009 MERCEDES BENZ C350 - 2006 to 2009 MERCEDES BENZ C36 AMG - 2006 to 2009 MERCEDES BENZ C43 AMG - 2004 MERCEDES BENZ C55 - 2007 MERCEDES BENZ C55 - 2006 to 2009 MERCEDES BENZ C63 - 2009 MERCEDES BENZ C63 AMG - 2001 to 2006 MERCEDES BENZ CL215 - 2000 to 2007 MERCEDES BENZ CL500 - 2003 to 2007 MERCEDES BENZ CL55 - 2001 to 2002 MERCEDES BENZ CL55 AMG - 2007 to 2009 MERCEDES BENZ CL550 - 2001 to 2009 MERCEDES BENZ CL600 - 2007 to 2009 MERCEDES BENZ CL63 - 2004 to 2009 MERCEDES BENZ CL65 - 2000 to 2009 MERCEDES BENZ CLK320 - 2005 to 2009 MERCEDES BENZ CLK350 - 2000 MERCEDES BENZ CLK430 - 2002 to 2003 MERCEDES BENZ CLK430 - 2003 to 2009 MERCEDES BENZ CLK500 - 2005 to 2009 MERCEDES BENZ CLK55 - 2007 to 2009 MERCEDES BENZ CLK550 - 2007 MERCEDES BENZ CLK63 - 2003 to 2009 MERCEDES BENZ CLS500 - 2005 MERCEDES BENZ CLS55 - 2007 to 2009 MERCEDES BENZ CLS55 - 2003 to 2009 MERCEDES BENZ CLS550 - 2003 to 2006 MERCEDES BENZ CLS63 - 2012 MERCEDES BENZ E - 2001 to 2002 MERCEDES BENZ E300 - 2000 to 2009 MERCEDES BENZ E320 - 2000 to 2002 MERCEDES BENZ E430 - 2006 MERCEDES BENZ E450 - 2003 to 2009 MERCEDES BENZ E500 - 2002 MERCEDES BENZ E55 - 2007 to 2009 MERCEDES BENZ E55 - 2004 to 2009 MERCEDES BENZ E550 - 2005 to 2006 MERCEDES BENZ E63 - 2002 to 2009 MERCEDES BENZ G500 - 2002 to 2009 MERCEDES BENZ G55 - 2006 to 2009 MERCEDES BENZ G550 - 2005 to 2009 MERCEDES BENZ GL320 - 2009 MERCEDES BENZ GL350 - 2005 to 2009 MERCEDES BENZ GL450 - 2005 to 2009 MERCEDES BENZ GL550 - 2011 MERCEDES BENZ GLK - 2009 MERCEDES BENZ GLK350 - 2000 to 2003 MERCEDES BENZ ML320 - 2005 to 2009 MERCEDES BENZ ML320 - 2001 MERCEDES BENZ ML350 - 2003 to 2009 MERCEDES BENZ ML350 - 2000 to 2001 MERCEDES BENZ ML430 - 2002 to 2009 MERCEDES BENZ ML500 - 2000 to 2003 MERCEDES BENZ ML55 - 2005 to 2009 MERCEDES BENZ ML550 - 2005 to 2009 MERCEDES BENZ ML63 - 2005 to 2009 MERCEDES BENZ R320 - 2005 to 2009 MERCEDES BENZ R500 - 2005 to 2009 MERCEDES BENZ R63 - 2015 MERCEDES BENZ REDUNDANT C63 AMG - 2005 to 2007 MERCEDES BENZ S350 - 2000 to 2007 MERCEDES BENZ S430 - 2000 to 2007 MERCEDES BENZ S500 - 2002 to 2007 MERCEDES BENZ S55 - 2001 MERCEDES BENZ S55 AMG - 2005 to 2008 MERCEDES BENZ S550 - 2001 to 2009 MERCEDES BENZ S600 - 2007 to 2009 MERCEDES BENZ S63 - 2005 to 2009 MERCEDES BENZ S65 - 2000 MERCEDES BENZ SL320 - 2000 to 2001 MERCEDES BENZ SL500 - 2003 to 2009 MERCEDES BENZ SL500 - 2003 MERCEDES BENZ SL500R - 2003 to 2009 MERCEDES BENZ SL55 - 2007 to 2009 MERCEDES BENZ SL550 - 2000 MERCEDES BENZ SL600 - 2003 to 2009 MERCEDES BENZ SL600 - 2007 to 2009 MERCEDES BENZ SL63 AMG - 2003 to 2009 MERCEDES BENZ SL65 - 2012 MERCEDES BENZ SLK - 2011 MERCEDES BENZ SLK2 - 2000 to 2001 MERCEDES BENZ SLK230 - 2004 to 2005 MERCEDES BENZ SLK230 - 2005 to 2009 MERCEDES BENZ SLK280 - 2009 MERCEDES BENZ SLK300 - 2004 MERCEDES BENZ SLK32 - 2001 to 2005 MERCEDES BENZ SLK320 - 2005 to 2009 MERCEDES BENZ SLK350 - 2005 to 2009 MERCEDES BENZ SLK55 - 2005 to 2007 MERCEDES BENZ SLR MCLAREN - 2000 to 2003 MERCEDES BENZ W163 - 2015 MERCEDES BENZ redundant S550E - 2019 to 2022 MERCEDES\-BENZ A 220 - MERCEDES\-BENZ ALL\-SEASON FLOOR MAT - 2020 to 2021 MERCEDES\-BENZ AMG A35 - 2020 MERCEDES\-BENZ AMG A45 - 2002 to 2004 MERCEDES\-BENZ AMG C32 - 2016 to 2024 MERCEDES\-BENZ AMG C43 - 2005 to 2006 MERCEDES\-BENZ AMG C55 - 2010 to 2021 MERCEDES\-BENZ AMG C63 - 2019 to 2023 MERCEDES\-BENZ AMG C63 S - 2023 to 2024 MERCEDES\-BENZ AMG C63 S E - 2015 to 2018 MERCEDES\-BENZ AMG C63S - 2020 to 2024 MERCEDES\-BENZ AMG CLA35 - 2014 to 2024 MERCEDES\-BENZ AMG CLA45 - 2024 MERCEDES\-BENZ AMG CLE53 - 2024 MERCEDES\-BENZ AMG CLE63E S - 2003 to 2005 MERCEDES\-BENZ AMG CLK55 - 2019 to 2021 MERCEDES\-BENZ AMG CLS53 - 2006 MERCEDES\-BENZ AMG CLS55 - 2007 to 2011 MERCEDES\-BENZ AMG CLS63 - 2017 to 2018 MERCEDES\-BENZ AMG CLS63 - 2017 to 2018 MERCEDES\-BENZ AMG E43 - 2019 to 2023 MERCEDES\-BENZ AMG E53 - 2021 MERCEDES\-BENZ AMG E53 S - 2023 MERCEDES\-BENZ AMG E53E - 2003 to 2006 MERCEDES\-BENZ AMG E55 - 2003 to 2004 MERCEDES\-BENZ AMG E63 - 2007 to 2009 MERCEDES\-BENZ AMG E63 - 2018 to 2023 MERCEDES\-BENZ AMG E63 - 2023 MERCEDES\-BENZ AMG E63 S - 2013 to 2015 MERCEDES\-BENZ AMG E63S - 2018 to 2022 MERCEDES\-BENZ AMG E63S - 2023 to 2024 MERCEDES\-BENZ AMG EQE - 2024 MERCEDES\-BENZ AMG EQE 53 4MATIC - 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 4MATIC - 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 53 4MATIC - 2022 to 2024 MERCEDES\-BENZ AMG EQS - 2022 to 2023 MERCEDES\-BENZ AMG EQS 53 - 2023 to 2024 MERCEDES\-BENZ AMG EQS 53 4MATIC - 2003 to 2009 MERCEDES\-BENZ AMG G 55 - 2010 to 2011 MERCEDES\-BENZ AMG G55 - 2013 to 2024 MERCEDES\-BENZ AMG G63 - 2016 to 2018 MERCEDES\-BENZ AMG G65 - 2024 to 2025 MERCEDES\-BENZ AMG GLA 35 - 2024 MERCEDES\-BENZ AMG GLA 45S - 2017 to 2018 MERCEDES\-BENZ AMG GLA35 - 2021 to 2023 MERCEDES\-BENZ AMG GLA35 - 2014 to 2023 MERCEDES\-BENZ AMG GLA45 - 2021 MERCEDES\-BENZ AMG GLA45 S - 2020 to 2024 MERCEDES\-BENZ AMG GLB35 - 2016 to 2024 MERCEDES\-BENZ AMG GLC43 - 2018 to 2022 MERCEDES\-BENZ AMG GLC63 - 2020 to 2023 MERCEDES\-BENZ AMG GLC63 S - 2024 MERCEDES\-BENZ AMG GLC63 S E - 2018 to 2019 MERCEDES\-BENZ AMG GLC63S - 2016 to 2021 MERCEDES\-BENZ AMG GLE43 - 2021 to 2022 MERCEDES\-BENZ AMG GLE53 - 2023 to 2024 MERCEDES\-BENZ AMG GLE53 4MATIC\+ - 2016 to 2024 MERCEDES\-BENZ AMG GLE63 - 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S - 2023 to 2024 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ - 2018 MERCEDES\-BENZ AMG GLE63S - 2017 to 2022 MERCEDES\-BENZ AMG GLS63 - 2023 to 2024 MERCEDES\-BENZ AMG GLS63 4MATIC\+ - 2023 MERCEDES\-BENZ AMG GLS63E - 2016 to 2021 MERCEDES\-BENZ AMG GT - 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 - 2016 to 2020 MERCEDES\-BENZ AMG GT S - 2020 to 2024 MERCEDES\-BENZ AMG GT43 - 2019 to 2023 MERCEDES\-BENZ AMG GT53 - 2024 MERCEDES\-BENZ AMG GT53E - 2024 MERCEDES\-BENZ AMG GT55 - 2019 to 2024 MERCEDES\-BENZ AMG GT63 - 2022 to 2023 MERCEDES\-BENZ AMG GT63 S - 2019 to 2021 MERCEDES\-BENZ AMG GT63S - 2018 MERCEDES\-BENZ AMG GTA - 2007 to 2015 MERCEDES\-BENZ AMG ML63 - 2013 to 2021 MERCEDES\-BENZ AMG S63 - 2015 to 2016 MERCEDES\-BENZ AMG S63 4MATIC - 2015 to 2020 MERCEDES\-BENZ AMG S65 - 2022 to 2024 MERCEDES\-BENZ AMG SL43 - 2024 MERCEDES\-BENZ AMG SL53E - 2022 to 2024 MERCEDES\-BENZ AMG SL55 - 2016 MERCEDES\-BENZ AMG SL63 - 2018 to 2020 MERCEDES\-BENZ AMG SL63 - 2022 to 2023 MERCEDES\-BENZ AMG SL63 - 2024 MERCEDES\-BENZ AMG SL63 S E - 2017 to 2019 MERCEDES\-BENZ AMG SL65 - 2017 to 2020 MERCEDES\-BENZ AMG SLC43 - 2013 MERCEDES\-BENZ AMG SLK55 - 2015 MERCEDES\-BENZ AMG SLK55 JSON: [/v1/bulletins/11008091](/v1/bulletins/11008091) [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%20LI82.70-P-077433&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11008091&vehicle=Service%20bulletin%20LI82.70-P-077433)