Yes on the Aero plus 8 which is half hidden under the wing!
It didn’t fall on the floor and took me ages to ‘fish’ it out so take care.
Some sort of chain screwed to the cap would be a good idea.

1969 4/4
1995 plus 8
1996 Plus 4 4seater
2002 Aero S1
2013 M3W
2014 Plus 8