C 300 (204.054) V6-3.0L (272.947) (2008)
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With code 494 USA version
The sealing ring for the pressure gauge connection is to be replaced after every opening.
Function
The pressure measuring connection with service valve makes it possible to test the fuel pressure for diagnostic purposes and to reduce the fuel pressure
during installation work.
The fuel pressure damper reduces fuel pressure pulsation when strongly fluctuating injection quantities.
