What this usually means
70% valve block or compressor. Real fix $400-1,200. Agent quotes $3,000+ for strut. SUV variants (GLC) less prone than W213 sedan but valve block still fails around 80k km.
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.
This is not a final diagnosis. It is a money-saving checklist before you go workshop.