What this usually means
On S-Class models, a sinking corner can be air strut, valve block or line leak. Demand a leak test and XENTRY level-calibration data before approving full multi-corner replacement.
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
- • Use/confirm: Air suspension test rig
This is not a final diagnosis. It is a money-saving checklist before you go workshop.