Service bulletin NCU - 2026050009

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

Update Digital Operator's Manual. 1. Connect XENTRY Diagnosis. 2. Update Digital Operator's Manual. To do this, select menu item "Quick test view → A26/17 - MBUX multimedia system (head unit) → Adaptations → Control unit update → Update control unit software". Then follow the user guidance in XENTRY Diagnosis. The Digital Operator's Manuals are downloaded automatically via Retail Data Storage to XENTRY Diagnosis to match the affected vehicle. 3. Disconnect XENTRY Diagnosis. 4. Check whether the Operator's Manual in the vehicle document wallet, as well as the supplements and accordion-fold document are present and whether the version is correct. Missing or incorrect Operator's Manuals, as well as supplements and accordion-fold document, must be replaced or enclosed as an aftermarket measure. The Operator's Manual, supplements and accordion-fold document must be determined according to the equipment variant for the vehicle identification number via the parts process in the XENTRY Portal!

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.

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

• Bulletins for another vehicle
• Report an error on this page
• Report an error by email