# Service bulletin NCU \- 2026050007

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.

- Type: Service bulletin
- NHTSA id: 11034045
- Published by NHTSA: 2026\-06\-25
- Manufacturer's number: NCU \- 2026050007
- Manufacturer's date: 2026\-06\-05
- NHTSA component: UNKNOWN OR OTHER

## 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034045-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034045-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Vehicles listed

- 2026 MERCEDES\-BENZ AMG GLA 35 4MATIC
- 2026 MERCEDES\-BENZ GLA 250
- 2026 MERCEDES\-BENZ GLA 250 4MATIC

JSON: [/v1/bulletins/11034045](/v1/bulletins/11034045)

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