T1N Fuel Pressure Relief Valve (2004-2006 Vans)[OM647]

This is the fuel pressure relief valve on the high pressure fuel pump at the front of the OM647 engine.

When you hear consistent humming from the front of the engine, its likely time to remove the old relief valve and replace with this new Bosch relief valve.  You can do this without removing the pump, although it’s tricky. 

* Mercedes Benz genuine part