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.
 The Enduro footpegs are sold in a pair. You also need...
 
The Vario plate is the part between the Vario...
 
These covers for the open holes beyond the seat are made of...