Brief (a few seconds), self-healing "driver assistance systems unavailable" messages are expected and...
Mercedes-Benz technical service bulletin LI54.71-P-080315 for 2026 Mercedes-Benz Cla 250+ (EV) and 2026 Mercedes-Benz Cla 350 4matic (EV).
- Bulletin number
- LI54.71-P-080315
- Component
- Electrical system
- Summary
- Complaint Brief (a few seconds), self-healing "driver assistance systems unavailable" messages are expected and normal due to system limitations and environmental effects. No case is necessary for these. Please refer to the Owner's Manual for driver assistance system limitations and environmental effects. If the vehicle is on MB.OS 1.3.0 or later and the "driver assistance systems unavailable" message displays in the instrument cluster and either: • DOES NOT clear within a few seconds OR • Appears on every key cycle and DOES NOT clear NOTE: To find the MB.OS version number: 1. Navigate to VeDoc. 2. Go to "Control Units" tab. 3. Find the header bar labeled "Vehicle Information for Control Units". 4. Locate "MB.OS car package release customer version". Cause Under Determination. Remedy Open a TIPS case to the Body/Chassis/Entertainment inbox based on the symptom below: If vehicle is still actively showing the white driver assist message: Do not shut off the vehicle and gather the following: • Quicktest • N62/5 Driver Assistance Control Unit Log with all sensors included. • Other control unit logs that are referenced in N62/5 DTC's. If the vehicle is not actively showing the white driver assist message: • Quicktest • N62/5 Driver Assistance Control Unit Log with all sensors included.
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