There is a drilling in the side of the plug in which you can put a size 3 Allen key or a Torx key T10 (usually found in the your BMW toolkit) in order to fit and remove it.
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Also referred to as oil filler cap.
These bar end weights made of stainless steel or aluminium...
These covers for the open holes of the engine mounting are...
Oil filler plug Torx, made of high-quality aluminium....