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March 18, 2025 Service bulletin

MBUX headunit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or...

Mercedes-Benz technical service bulletin LI54.71-P-078802 for 2016-2023 Mercedes-Benz GLC 300, 2020-2025 Mercedes-Benz GLA 250 and 2020-2024 Mercedes-Benz GLS 450 and others.

Bulletin number
LI54.71-P-078802
Component
Back over prevention: warnings
Summary
Complaint MBUX headunit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or (549+U19). Cause Under analysis. Remedy For chassis 118, 167, 177, 213, 238, 243, 247, 253, and 293 use Xentry to update headunit (A26/17). Target software number is 247 904 6600 (E905.4). If vehicle fits all criteria and target software is not available via Xentry, please open an XSS ticket.

Owners of these vehicles have filed 127 complaints in the driver assistance category.

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