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RecallGazette

Vehicle problems, recalls & safety intelligence

Mercedes EQA 2019–2025 — technical service bulletin

Bulletin LI54.30-P-079004 · NHTSA communication 11017135 · issued Apr 21, 2025

Technical service bulletin
communication type
Electrical System
component
2019–2025
model years
60
vehicle entries

Official 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)" -> "Adap

Vehicles covered

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.