# Service bulletin LI82.10\-P\-078301

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: 11029025
- Published by NHTSA: 2026\-02\-25
- Manufacturer's number: LI82.10\-P\-078301
- Manufacturer's date: 2026\-02\-24
- NHTSA component: EXTERIOR LIGHTING

## NHTSA's summary

Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop \(temperature higher than \+18 °C/\+64.4 °F\) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). 2. Connect battery backup via a charger. 3. Open the front\-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. \(see Remedy 2\) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10\-P\-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. • Open ventilation system LI82.10\-P\-078302 • Closed ventilation system LI82.10\-P\-078304

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029025-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029025-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Lighting

## Vehicles listed

- 2018 MERCEDES BENZ A 220
- 2008 MERCEDES BENZ AMG CLK63
- 2007 MERCEDES BENZ AMG R63
- 2018 MERCEDES BENZ C 300 4MATIC
- 2002 to 2007 MERCEDES BENZ C230
- 2002 to 2005 MERCEDES BENZ C240
- 2006 to 2007 MERCEDES BENZ C280
- 2008 to 2009 MERCEDES BENZ C300
- 2002 to 2005 MERCEDES BENZ C320
- 2006 to 2009 MERCEDES BENZ C350
- 2009 MERCEDES BENZ C63 AMG
- 2002 to 2006 MERCEDES BENZ CL500
- 2003 to 2006 MERCEDES BENZ CL55
- 2002 MERCEDES BENZ CL55 AMG
- 2007 to 2009 MERCEDES BENZ CL550
- 2002 to 2009 MERCEDES BENZ CL600
- 2008 to 2009 MERCEDES BENZ CL63
- 2005 to 2006 MERCEDES BENZ CL65
- 2008 to 2009 MERCEDES BENZ CL65
- 2002 to 2005 MERCEDES BENZ CLK320
- 2006 to 2009 MERCEDES BENZ CLK350
- 2002 to 2003 MERCEDES BENZ CLK430
- 2003 to 2006 MERCEDES BENZ CLK500
- 2006 MERCEDES BENZ CLK55
- 2007 to 2009 MERCEDES BENZ CLK550
- 2007 MERCEDES BENZ CLK63
- 2006 MERCEDES BENZ CLS500
- 2007 to 2009 MERCEDES BENZ CLS550
- 2002 MERCEDES BENZ E320
- 2005 to 2009 MERCEDES BENZ E320
- 2002 MERCEDES BENZ E430
- 2007 to 2009 MERCEDES BENZ E500
- 2007 to 2009 MERCEDES BENZ E550
- 2007 to 2009 MERCEDES BENZ GL320
- 2007 to 2009 MERCEDES BENZ GL450
- 2008 to 2009 MERCEDES BENZ GL550
- 2002 to 2003 MERCEDES BENZ ML320
- 2007 to 2009 MERCEDES BENZ ML320
- 2003 to 2009 MERCEDES BENZ ML350
- 2002 to 2007 MERCEDES BENZ ML500
- 2002 to 2003 MERCEDES BENZ ML55
- 2008 to 2009 MERCEDES BENZ ML550
- 2007 to 2009 MERCEDES BENZ R320
- 2006 to 2007 MERCEDES BENZ R500
- 2006 MERCEDES BENZ S350
- 2002 to 2006 MERCEDES BENZ S430
- 2002 to 2006 MERCEDES BENZ S500
- 2002 to 2006 MERCEDES BENZ S55
- 2007 to 2008 MERCEDES BENZ S550
- 2002 to 2009 MERCEDES BENZ S600
- 2008 to 2009 MERCEDES BENZ S63
- 2006 to 2009 MERCEDES BENZ S65
- 2003 to 2006 MERCEDES BENZ SL500
- 2003 to 2009 MERCEDES BENZ SL55
- 2007 to 2009 MERCEDES BENZ SL550
- 2004 to 2009 MERCEDES BENZ SL600
- 2005 to 2009 MERCEDES BENZ SL65
- 2004 MERCEDES BENZ SLK230
- 2005 to 2009 MERCEDES BENZ SLK280
- 2009 MERCEDES BENZ SLK300
- 2004 MERCEDES BENZ SLK32
- 2005 to 2009 MERCEDES BENZ SLK350
- 2005 to 2009 MERCEDES BENZ SLK55
- 2019 to 2022 MERCEDES\-BENZ A 220
- 2020 to 2021 MERCEDES\-BENZ A 220 4MATIC
- 2020 to 2021 MERCEDES\-BENZ AMG A35
- 2020 MERCEDES\-BENZ AMG A35 4MATIC
- 2002 to 2004 MERCEDES\-BENZ AMG C32
- 2017 to 2024 MERCEDES\-BENZ AMG C43
- 2023 to 2026 MERCEDES\-BENZ AMG C43 4MATIC
- 2005 to 2006 MERCEDES\-BENZ AMG C55
- 2010 to 2021 MERCEDES\-BENZ AMG C63
- 2019 to 2023 MERCEDES\-BENZ AMG C63 S
- 2024 MERCEDES\-BENZ AMG C63 S E
- 2024 to 2025 MERCEDES\-BENZ AMG C63 S E 4MATIC\+
- 2026 MERCEDES\-BENZ AMG C63 S E PERFORMANCE 4MATIC\+
- 2017 MERCEDES\-BENZ AMG C63S
- 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
- 2023 MERCEDES\-BENZ AMG E63 S
- 2013 to 2015 MERCEDES\-BENZ AMG E63S
- 2018 to 2022 MERCEDES\-BENZ AMG E63S
- 2023 to 2025 MERCEDES\-BENZ AMG EQE
- 2023 to 2025 MERCEDES\-BENZ AMG EQE 4MATIC\+
- 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 4MATIC
- 2022 to 2024 MERCEDES\-BENZ AMG EQS
- 2023 to 2025 MERCEDES\-BENZ AMG EQS 4MATIC\+
- 2024 to 2025 MERCEDES\-BENZ AMG GLA 35
- 2024 MERCEDES\-BENZ AMG GLA 35 4MATIC
- 2026 MERCEDES\-BENZ AMG GLA 35 4MATIC
- 2021 to 2023 MERCEDES\-BENZ AMG GLA35
- 2015 to 2018 MERCEDES\-BENZ AMG GLA45
- 2021 to 2023 MERCEDES\-BENZ AMG GLA45
- 2021 to 2025 MERCEDES\-BENZ AMG GLB35
- 2026 MERCEDES\-BENZ AMG GLB35 4MATIC
- 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 2021 MERCEDES\-BENZ AMG GLC63
- 2020 to 2023 MERCEDES\-BENZ AMG GLC63 S
- 2025 MERCEDES\-BENZ AMG GLC63 S E
- 2025 to 2026 MERCEDES\-BENZ AMG GLC63 S E 4MATIC\+
- 2025 to 2026 MERCEDES\-BENZ AMG GLC63 S E 4MATIC\+ COUPE
- 2018 to 2019 MERCEDES\-BENZ AMG GLC63S
- 2016 to 2019 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
- 2021 to 2022 MERCEDES\-BENZ AMG GLE53 COUPE
- 2016 to 2019 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
- 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S COUPE
- 2018 MERCEDES\-BENZ AMG GLE63S
- 2017 to 2022 MERCEDES\-BENZ AMG GLS63
- 2026 MERCEDES\-BENZ AMG GLS63
- 2023 to 2025 MERCEDES\-BENZ AMG GLS63 4MATIC\+
- 2017 to 2021 MERCEDES\-BENZ AMG GT
- 2023 MERCEDES\-BENZ AMG GT 63 S E COUPE
- 2018 to 2021 MERCEDES\-BENZ AMG GT C
- 2018 to 2020 MERCEDES\-BENZ AMG GT R
- 2016 to 2019 MERCEDES\-BENZ AMG GT S
- 2021 to 2026 MERCEDES\-BENZ AMG GT43
- 2019 to 2023 MERCEDES\-BENZ AMG GT53
- 2024 to 2025 MERCEDES\-BENZ AMG GT55
- 2024 to 2026 MERCEDES\-BENZ AMG GT55 4MATIC\+
- 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
- 2007 to 2015 MERCEDES\-BENZ AMG ML63
- 2023 to 2025 MERCEDES\-BENZ AMG S 63 E 4MATIC\+
- 2013 to 2021 MERCEDES\-BENZ AMG S63
- 2015 to 2016 MERCEDES\-BENZ AMG S63 4MATIC
- 2015 to 2020 MERCEDES\-BENZ AMG S65
- 2023 to 2026 MERCEDES\-BENZ AMG SL43
- 2022 to 2025 MERCEDES\-BENZ AMG SL55
- 2023 to 2026 MERCEDES\-BENZ AMG SL55 4MATIC\+
- 2016 MERCEDES\-BENZ AMG SL63
- 2018 to 2020 MERCEDES\-BENZ AMG SL63
- 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 2018 MERCEDES\-BENZ AMG SL65
- 2017 to 2020 MERCEDES\-BENZ AMG SLC43
- 2013 MERCEDES\-BENZ AMG SLK55
- 2015 MERCEDES\-BENZ AMG SLK55
- 2011 to 2012 MERCEDES\-BENZ AMG SLS
- 2014 to 2017 MERCEDES\-BENZ B 250E
- 2017 to 2026 MERCEDES\-BENZ C 300
- 2021 to 2026 MERCEDES\-BENZ C 300 4MATIC
- 2018 MERCEDES\-BENZ C 350 E
- 2012 to 2015 MERCEDES\-BENZ C250
- 2010 to 2016 MERCEDES\-BENZ C300
- 2010 to 2015 MERCEDES\-BENZ C350
- 2016 to 2017 MERCEDES\-BENZ C350E
- 2015 MERCEDES\-BENZ C400
- 2016 to 2017 MERCEDES\-BENZ C450
- 2010 to 2014 MERCEDES\-BENZ CL550
- 2010 to 2014 MERCEDES\-BENZ CL600
- 2010 to 2014 MERCEDES\-BENZ CL63
- 2010 to 2014 MERCEDES\-BENZ CL65
- 2026 MERCEDES\-BENZ CLA 250\+ \(EV\)
- 2026 MERCEDES\-BENZ CLA 350 4MATIC \(EV\)
- 2016 MERCEDES\-BENZ CLS 400
- 2019 to 2023 MERCEDES\-BENZ CLS 450
- 2016 MERCEDES\-BENZ CLS 550
- 2018 MERCEDES\-BENZ CLS 550
- 2016 MERCEDES\-BENZ CLS 63S
- 2015 MERCEDES\-BENZ CLS400
- 2010 to 2015 MERCEDES\-BENZ CLS550
- 2017 MERCEDES\-BENZ CLS550
- 2012 to 2015 MERCEDES\-BENZ CLS63
- 2014 to 2015 MERCEDES\-BENZ CLS63S
- 2018 to 2019 MERCEDES\-BENZ E 300
- 2020 to 2023 MERCEDES\-BENZ E 350
- 2025 to 2026 MERCEDES\-BENZ E 350
- 2024 to 2025 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
- 2024 to 2026 MERCEDES\-BENZ E 450 4MATIC ALL\-TERRAIN
- 2014 to 2016 MERCEDES\-BENZ E250
- 2016 to 2017 MERCEDES\-BENZ E300
- 2006 to 2016 MERCEDES\-BENZ E350
- 2015 to 2017 MERCEDES\-BENZ E400
- 2013 to 2015 MERCEDES\-BENZ E400 HYBRID
- 2025 MERCEDES\-BENZ E53 E 4MATIC\+

JSON: [/v1/bulletins/11029025](/v1/bulletins/11029025)

[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%20LI82.10-P-078301&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11029025&vehicle=Service%20bulletin%20LI82.10-P-078301)