Mercedes Workshop Manual Om646 Engine 【Hot ◎】
Using a calibrated torque wrench is mandatory when repairing an aluminum-headed diesel engine. Torque Specification 200 Nm + 90° Camshaft Bearing Caps Camshaft Sprocket Bolts 18 Nm + 90° Injector Hold-down Bolt 7 Nm + 90° + 90° (Always use new bolts) Oil Pan Drain Plug Oil Filter Housing Cap Glow Plugs 15 Nm (Do not exceed 20 Nm on removal) Flywheel Bolts 45 Nm + 90° Diagnostic Error Codes (DTCs)
Check the vacuum lines supplying the turbo actuator and EGR valve for splits.
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Turbocharged with Intercooler (VNT/VTG technology). 2. Essential Torque Specifications
Loss of power, limp mode, check engine light (CEL), and black smoke. Using a calibrated torque wrench is mandatory when
For detailed repair and maintenance, you can find specific documentation through these professional and community sources:
Buy a high-quality PDF from a reputable source like Tradebit or download the Mercedes WIS (Virtual Machine) setup from a trusted torrent (legality varies by country—buy used DVDs legally). For detailed repair and maintenance, you can find
This content is a technical summary based on factory procedures. Always refer to the current Mercedes-Benz WIS for model-specific variations and safety protocols.
Loss of power, limp mode, black smoke, and error codes P2511 or P2004.