Mercedes E-Class Engine Knocking — OM642 Injector Rattle
Mercedes-Benz
E-Class
2006
OM642 3.0 CDI V6
Safe to Drive?
⚠️ Drive with Caution
Urgency Level
🟢 Low Priority
A tapping or rattling noise from the top end of OM642 V6 diesel is typically injector mechanical noise, not bearing knock. OM642 injectors are notably audible. Genuine bearing knock is deeper and more resonant. Injector noise that worsens indicates injector wear requiring replacement at £200-400 each.
Repair / Solution
No confirmed fixes yet. Share yours below.
📖 Related Repair Guides
Help other owners by sharing your experience.
Your real-world fix helps thousands of drivers worldwide. Takes 2 minutes.