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Underboost (check vacuum lines to the turbo actuator). P2047: Injector circuit malfunction.

MB 325.0 (Blue/Green) or 325.6 (Pink/Violet) depending on year; mixed 50:50 with distilled water.

Particulate Trap Efficiency Below Threshold (Bank 1) (DPF is clogged or the differential pressure sensor failed).

Modern diesel engines are not the simple mechanical pumps of the 1980s. The OM646 relies on complex systems—common-rail injection, variable geometry turbochargers (VG turbo), and intricate electronics. A workshop manual provides:

Limp home mode, poor acceleration, black smoke under load, fault codes P2511 or P2359.

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  • Mercedes Workshop Manual Om646 Engine ^new^ Today

    Underboost (check vacuum lines to the turbo actuator). P2047: Injector circuit malfunction.

    MB 325.0 (Blue/Green) or 325.6 (Pink/Violet) depending on year; mixed 50:50 with distilled water. Mercedes Workshop Manual Om646 Engine

    Particulate Trap Efficiency Below Threshold (Bank 1) (DPF is clogged or the differential pressure sensor failed). Underboost (check vacuum lines to the turbo actuator)

    Modern diesel engines are not the simple mechanical pumps of the 1980s. The OM646 relies on complex systems—common-rail injection, variable geometry turbochargers (VG turbo), and intricate electronics. A workshop manual provides: variable geometry turbochargers (VG turbo)

    Limp home mode, poor acceleration, black smoke under load, fault codes P2511 or P2359.

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Mercedes Workshop Manual Om646 Engine