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.
See tools
Also referred to as oil filler cap.
These plastic crash bar pads provide additional protection...
Oil filler plug Torx, made of high-quality aluminium....
These stainless steel engine guards will never rust like...