Excuse my English, but it is that I am Brazilian and I will try to be the more possible clearing.

Well, I have a Mercedes-Benz model C280 Sport Plus 95/95, for some time now I noticed that in her back compartment it was some thing making a constant noise, he gave the impression of being something similar a bomb of fuel pulling, stopping for some seconds, and pulling again, discovering better, I located the called piece of "Vacuum Supply Pump", and I discovered that it was her the causes of the noise.

Does it happen that starting from the moment that I work the compartment of departure of the car, she begins to work, not stopping plus, is the whole time pulling or loosening something, besides it does warm up a lot, is the interesting that everything is usually working, all the doors are opening and closing, then he would like to know where the cause of that problem could be?

Thankful for the attention.
Att. Carlos

 

it must be the PSE pump.

must have leak somewhere on vacuum system.

have it check soon or else the pump will get damage.

 

Like sleepwalker said, you have a vacuum leak somewhere. There are many places the vacuum leak could be coming from. Try turning the car to the "ON" position but not starting the engine and listen for any leaks in the dashboard area. It will be a hissing sound. From there, try the doors and trunk area to hear for a leak.

 

Respected friends,

You could help me, informing or posting some site where I can find the diagrams and the outline of the system of vaccum of my model C280 SPORT 95/95 SPORT PLUS chassis WDBHA28W9SF224113

Thankful!