time it one morning.
there is a 90 second auxilary pump that runs when your car has been sitting. it's very loud. (my parents say it sometimes wakes them up when i leave for school) but it only lasts 90 seconds then quits.
<img src='http://www.bmw-forums.com/forum/uploads/post-46-1095116979.jpg' border='0' alt='user posted image' />
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