Mercedes E-Class White Smoke — OM651 EGR Cooler Crack
Mercedes-Benz
E-Class
2009
OM651 2.2 CDI
⚡ 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
White smoke with a sweet coolant smell from the exhaust of W212 E220 CDI indicates a cracked EGR cooler allowing coolant into the intake. Coolant level drops without visible external leak. EGR cooler replacement costs £400-800.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Mercedes-Benz E-Class 2009 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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