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.
This brake pedal enlargement is nicely machined of...
These parts will raise your handlebars for 25 mm, creating a...
This adjustable licence plate bracket is made of...