Pretty rare.... Then again, S1 models are pretty rare these days. I had a red interior in mine and so far have swapped almost all of it to black (started with Corrado leather seats) which I prefer. I'll get to the carpet one of these days
As to the tails, chrome trim started around 78 if I recall correctly....black trim for the 'S' model only.




the red and or blue themed interiors
Or the plaids from 75-77 cars.




