Remove the line on TOP of the vacuum pump. Get a flashlight and look in the
fitting on top of the
vacuum pump. Do you see a check valve in it? Or is it an open fitting? More
than likely, it will be
empty. If it is, go to your MB dealer and buy a new fitting. It is available
Remove the fan and fan shroud. Remove the screws from the cover on the vacuum
pump. Carefully remove
the cover and WATCH the position and the direction of the two check valves in
the front. Remove the
Fish out the 3 pieces of the broken check valve that fell down from the top
fitting: a flat piece of
metal with 3 ears [that is the piece that broke], a spring, and a dark grey
The replaceable fitting/check valve is #20 here:
http://www.detali.ru/cat/oem_mb2.asp?TP=1&F 3193&Ma7%2E952&GAr2%2E120315&CT=M&cat3&SID&SGR 0&SGN
Part number 004 997 18 72
Available here also: http://www.importeccatalog.com /
Only a buck cheaper than the dealer list price.....
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