Service bulletin LI54.71-P-080653

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's 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. To verify MB.OS number, it can be found in: 1. A26/17 in Xentry under version or 2. VeDoc > Vehicle Information for Control Units (below reference, vehicle is on 1.3.0) 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 New MB.OS update by June 09, 2026 at the latest for 1.3.10. If date is prior to June 09, 2026, vehicle can be released. The message just needs to be cleared on startup in the instrument cluster and all ADAS systems function. Once software is 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.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Trouble codes named

U1427

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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