Complaint After a software update, the MBUX multimedia system (A26/17) may incorrectly display the fault...

Bulletin number

LI82.85-P-068986

Component

Electrical system

Summary

Complaint After a software update, the MBUX multimedia system (A26/17) may incorrectly display the fault code B19C804 "Software tampering has been detected. There is an internal fault". Note: If there are no relevant customer complaints, then the DTC can be ignored as it does not directly affect functionality. If there is a customer complaint in addition to the above DTC, further diagnostic measures must be performed. Cause The current software release of the MBUX multimedia system (A26/17) Remedy Update the A26/17 to newest available software release. Note: Do not replace any parts.

Owners of these vehicles have filed 309 complaints in the electrical category.