Mercedes W204 C220 CDI EGR Valve Carbon Fouling
Mercedes-Benz
C-Class
2007
OM651 2.2 CDI
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
✅ Safe to Drive
Safety Impact
No direct safety impact reported by owners
Urgency Level
🟡 Monitor Closely
Carbon deposits on the EGR valve of W204 C220 CDI cause limp mode and P0400 codes. Cleaning resolves most cases. Replacement EGR valve costs £200-450.
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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