Code Plugs ?

[nicksaxby]

I seem to remember that it is possible to change code plugs
Pink/Brown etc to change engine characteristics ,Is this what is done to enable running on poor fuel as advertised by BMW.
and where is this device situated ?
Thank s All

 

[magee]

Get a beer or whatever takes your fancy, do a search for code plugs, and read away. Stacks of info and best of luck.