What this usually means
S-Class electrical warnings are often auxiliary battery, weak main battery, parasitic draw or module wake-up issue before control-unit replacement. Ask for battery load test and sleep-current measurement.
What to ask the workshop before approving repair
- • Show the diagnostic fault codes.
- • Show photo/video proof of the failed part.
- • Give an itemised quote for parts and labour.
- • Explain why cheaper common fixes were ruled out.
- • Use/confirm: Star Diagnostic XENTRY
This is not a final diagnosis. It is a money-saving checklist before you go workshop.