Mercedes E-Class Timing Belt Service Cost OM646 OM651
Mercedes-Benz
E-Class
2003
OM646/OM651
⚡ Quick Summary
Severity Level
Low
Safe to Drive?
✅ Safe to Drive
Safety Impact
No direct safety impact reported by owners
Urgency Level
🟢 Low Priority
Mercedes E220 CDI timing chain (not belt) on OM651 requires no scheduled service but should be inspected at 150,000 miles. OM646 uses a chain. EGR cooler inspection at 80,000 miles is more important than chain on these engines.
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 2003 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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