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June 30, 2020 Service bulletin

Lamp unit fogged or droplets forming

Mercedes-Benz technical service bulletin LI82.10-P-064766 for 2010-2019 Mercedes-Benz C300, 2008-2017, 2020 Mercedes-Benz E350 and 2008-2009 Mercedes Benz C300 and others.

Bulletin number
LI82.10-P-064766
Component
Exterior lighting
Summary
Lamp unit fogged or droplets forming. Due to the vent openings, the lamp unit is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate it. This can result in deposits on the diffuser and lens. Check housing cover of lamp unit for natural fogging or dew as per GI82.10-P-009047. . 1. If a reduction in the degree of fogging is visible, the desiccant packs can be used once the condensation has completely evaporated. 1.1. Order the required service covers by referring to the variant overview. 1.2. Remove lamp unit 1.3. Remove all grommets from vent openings. 1.4. Seal vent openings with sealing profile. Important: All openings must be sealed carefully for the pressure compensation membrane to work properly! 1.5. Remove existing service cover 1.6. Place desiccant packs in new service covers and bolt down 1.7. Stick new diaphragm onto specified surface on service cover [picture of service cover] Note: The bonding surface must be clean and dry. 06

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