Rarely seen factory fitted optional extras

[Fun Bus]

Sometimes, certain factory extras rarely seem to be specced on cars when new. First one that springs to mind for me is the electric rear sunblind on the E46 3-series.

What others are there?

[Fun Bus]

pits said:

It's not that rare, it was just a £1200 option iirc

£230 on an M3 in 2004.