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Discussion Starter · #1 ·
:dunno:

Hi, happy to join bimmerfest.

Just got 1997 540i black on black preowned. Brought it home from the mechanic
2days ago, every thing seems ok. I tried to adjust the buttons on the plastic
piece located on the side of driver seat(covering outer left buttons) or better
still the sport seat/comfort seat buttons, then I hear a vacum leak, did I mistakenly
press the wrong button, I need help before I drive my baby to the mechanic
tomorrow.

Prompt response please.

Qtwins
 

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The round button is responsible for controlling lumbar support bags. Two of the positions will bleed air from the lumbar support bags. Two of the positions will pump air into the lumbar support bags. The noise you are hears is most likely coming from one of these items.
 
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