I own a C250D (1994) which has given me excellent service. One morning it decided not to start, after spend 2 days i manage to spot an air leak into the fuel system. The fuel leak exist at the joint between the diesel pump and the switch (i am not sure what its called). Does someone know what its called and how to fix it ? Do i have to replace the whole pump or is the switch available to buy on its own ?

The blue circled area is the black plastic box connected to the pump


[IMG]local://upfiles/29565/3D9960ED49744EE0BF0AD45E4CD447EC.jpg[/IMG]