w204 brake problem

[dodd1980]

Driving this morning fine then all of a sudden I have lost power brakes, any ideas welcome. Checked for hoses that might have come off and nothing

 

[dozypillock]

When you say "lost" do you mean pedal sunk to floor, or pedal pushed, and nothing happened?

Neil

 

[dodd1980]

pedal is rock hard to press, like you have lost vacuum to the servo, got chance to look tonight and found some oil sprayed on the bulkhead and dripping onto the tranny from a circular metal housing on the back of the engine right up the top, this has the hose connected to it from the servo but i have no idea what this is???

 

[grober]

I'm guessing this is the engine driven vacuum pump [ Diesels don't produce any inlet manifold vacuum] but I am unsure where exactly it attaches to the engine? A PICTURE WOULD HELP?

 

[dodd1980]

i think you are correct about the pump, i do have a petrol not diesel but just googled it and that is it

Thanks

 

[dodd1980]

took the vacuum pump off today to find both dog teeth broken off and the part of the pump housing that slides in the engine split in two.

Definitely broke i think

 

[grober]

This about an earlier M271 but might help?? DIY 05 C230 Vacuum Pump replacement - MBWorld.org Forums

 

[grober]

Part nos I have are A2712301665 pump A2712380380 seal/gasket
M6x25 N910143006003 Hexaglobular bolt
Pump around £124 from Inschcape

 

[dodd1980]

thanks on order just waiting for delivery as they dont have one, hope it comes soon