Whenever I start my car I hear a woosh...woosh...woosh for about a minute or so. When the car is warm it does not do it. It sounds like a vacumn leak or air leak. It also sounds like it is coming from the rear of the car but it is hard to tell. Everything on the car works except the cruise control and the orthopedic seats. The seat switches positions have no noticeable effect on either front seat. I read on a past thread the seats are vacumn operated. Where is the pump located on a 126 and could the sound be related to the seats or is it something totally different? Also any help in diagnosing the cruise control would be appreciated. The switch does nothing. Is there a procedure for troubeshooting the cruise system?
Thanks for your help.
Ken

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1990 300 SEL