bobbybob Posted March 4, 2007 Share Posted March 4, 2007 NOT the preload adjuster--I know about that. This is a black knurled knob right next to the rear brake reservoir. Kinda loose but won't turn. What the hell IS that thing? Link to comment
duckbubbles Posted March 4, 2007 Share Posted March 4, 2007 I'm willing to bet that it is the cover on the port for the diagnostic computer to plug into. Look to see if there are wires coming out from under it. Frank Link to comment
loujack Posted March 5, 2007 Share Posted March 5, 2007 Duckbubbles is right - it is the diagnostic computer plug, it comes off to reveal the interface connection. Link to comment
Jim VonBaden Posted March 5, 2007 Share Posted March 5, 2007 It may not be a knob at all. It might be the end of the bleeder hose for the clutch, depending on if you have a hydraulic clutch, you are referring to a BMW, and it is about 5/8" in diameter. Jim Link to comment
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