jawzay

Hello,

I have a lot of vacuum when I open the fuel cap. I know there is normaly an overpressure but in this case there is a very high vacuum, also a dent in the fueltank an dissapeares when i open the fuel cap.
A strange thing is that I discovered a lot of small pieces of plastic (grains) in the fuel filter when i changed it. I really dont know where they come from. And whats the name of the sparepart (see attachement).
Someone a solution for this problem?

Mercedes c200 CDI (2000)
Engine M611.960

Thanks,

ptcruiser

Check your overflow breather pipe just below the gas cap.
You can run a small wire down to see if there is any blockage.
That would be my guess?

jawzay

thanks,

But already done that and no blockade.

jawzay

Right under the fueltank there's an electric valve (see pic). Whats the function of this valve and whats its name?