After updating MB.OS to 1.3.7, every key cycle displays consistent instrument cluster message "Driver...
Mercedes-Benz technical service bulletin LI54.71-P-080653 for 2026 Mercedes-Benz Cla 250+ (EV) and 2026 Mercedes-Benz Cla 350 4matic (EV).
- Bulletin number
- LI54.71-P-080653
- Component
- Electrical system
- Summary
- Complaint After updating MB.OS to 1.3.7, every key cycle displays consistent instrument cluster message "Driver Assistance System Functions Limited Please Drive with Caution See Operator's Manual". Note: Verify this is the exact message, there are other variants of white ADAS cluster messages. The driver assistance control unit N62/5 Processor will also have an active and stored DTC U142791 - "Implausible data were received from the control unit 'Head unit'. The parameter is outside the permissible range." Cause Under Determination. Remedy Check for new MB.OS update on May 29, 2026 from 1.3.7 to 1.3.10. If available, update and bus sleep (30 minutes). Re-check vehicle after bus sleep for presence of cluster message. If message has cleared and concern is resolved, release the vehicle. If not, open a TIPS case to Body, Chassis, and Entertainment inbox.
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