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June 12, 2026 Service bulletin

Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the...

Mercedes-Benz technical service bulletin LI00.20-P-080703 for 2015-2023 Mercedes-Benz C300, 2020-2023 Mercedes-Benz E350 and 2016-2023 Mercedes-Benz GLC 300 and others.

Bulletin number
LI00.20-P-080703
Component
Electrical system
Summary
Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop menu, e.g., 505 or 550A, which includes a service A. Cause The root cause is currently being investigated. Remedy To determine the cause, the instrument cluster control unit (N133/1) and powertrain control unit (N127) logs are required before confirming the service or correction using XENTRY Diagnosis. Please open a TIPS case to BCE inbox with the requested information in the attachments.

Owners of these vehicles have filed 711 complaints in the electrical category.

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