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August 6, 2026 Service bulletin

Complaint A popup is seen on the HU with the message "data connection temporarily not available"....

Mercedes-Benz technical service bulletin LI82.85-P-079087 for 2015-2023 Mercedes-Benz C300, 2011-2016, 2020-2023 Mercedes-Benz E350 and 2012-2015 Mercedes-Benz C250 and others.

Bulletin number
LI82.85-P-079087
Component
Electrical system
Summary
Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search 3.IP Radio 4.Send2Car 5.Speech Detection Service 6.Navigation 7.iHeartRadio 8.Traffic Cams Cause MB Apps is sundowned for all vehicles with NTG4.5 and NTG5 Head Unit Variant. Remedy No support available for NTG4.5 and NTG5 Head Unit Variants for MB App related topics. Note: Please do not create TIPS. Please do not replace any components. HU/Hermes SW update / SCN coding will not fix the issue.

Owners of these vehicles have filed 697 complaints in the electrical category.

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