What this usually means
This is 80% likely to be a leaking VALVE BLOCK ($300-450), not the full airbag/strut. The Mercedes agent typically quotes $3,000-3,500 for a strut replacement they don't always need. Demand a leak test FIRST. If the air bag is intact and only the valve block leaks, the real fix is 10× cheaper.
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.