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Singapore car repair guide

Mercedes V-Class Viano: Rear aircon weak / cabin not cooling evenly

If you are seeing this symptom in Singapore, use this as a pre-workshop checklist. The goal is to identify the likely root cause, avoid replacing the wrong part, and know the fair repair range before approving work.

Fair SG range
$180–$1,200
Red-flag quote
$1,800+
Likely fix
Aircon leak test, rear blower/flap/expansion valve diagnosis

What this usually means

Large MPV aircon complaints are commonly refrigerant leak, rear blower, flap motor or expansion valve before compressor replacement. Ask for pressure readings and vent temperature data.

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.

Other problems on this Mercedes V-Class Viano (2011-present)

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