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April 21, 2025 Service bulletin

The message "Device detected at diagnostics connection See Owner’s Manual" appears sporadically in the...

Mercedes-Benz technical service bulletin LI54.30-P-079004 for 2020-2024 Mercedes-Benz CLA250, 2020-2024 Mercedes-Benz GLE 350 and 2020-2025 Mercedes-Benz GLA 250 and others.

Bulletin number
LI54.30-P-079004
Component
Electrical system
Summary
Complaint The message "Device detected at diagnostics connection See Owner’s Manual" appears sporadically in the multifunction display of the instrument cluster while driving (see picture in attachment). Cause On vehicles with HERMES 3.0 currently, • A2389015700 • A2389015800 • A2389018400 • A2389018900 • A2389019000 • A2389019800 • A2579011200 • A2579012100 The above-mentioned message is sporadically displayed in the instrument cluster once Remedy Please manually commission the control unit N112/9 (HERMES) using XENTRY: XENTRY→ "N112/9 - Control unit for telematics services (HERMES)" -> "Adaptations" -> "Control unit commissioning" -> "Commissioning of previously installed control unit" Invoice the required work using damage code 8251M/01 (damage location/damage type).

Owners of these vehicles have filed 157 complaints in the electrical category.

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