Quote:
Originally Posted by ctaylor738
Sort of. I've never messed with an '87, but I think in '86 Mercedes started with an electric pump setup that runs one way for vacuum and the opposite for pressure, so there is only one line to each element.
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I think you are right on the money here- I can hear the pump run somewhere underneath the rear seat maybe. It cuts off after 10 sec. or so. What is the 1,2,3,.. : from the electric vacuum pump to where?