Mercedes C-Class Overheating — Coolant Thermostat Failure
Mercedes-Benz
C-Class
2007
M271/M272
⚡ Quick Summary
Severity Level
High
Safe to Drive?
🚫 Do NOT Drive
Safety Impact
Direct safety risk — affects safe operation of the vehicle
Urgency Level
🟠 Fix Soon
Mercedes W204 overheating with the temperature gauge rising above the middle position indicates thermostat failure. A stuck-closed thermostat prevents coolant circulation. Replace thermostat, thermostat housing (plastic) and coolant simultaneously. Cost: £200-400.
Onarım / Çözüm
No confirmed fixes yet. Share yours below.
⚠️ Yanlış Teşhis mi?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Mercedes-Benz C-Class 2007 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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