The BMW M Coupe may be one of the few cars where you may not want a sunroof.  Sunroofs came standard on the M Coupe with the option being a “sunroof-delete”.  Very few dealers ordering for their lots wanted to de-content their cars, so very few have this rare “option”.  It’s been reported that only 16% of coupes are sunroof-deletes (452 of 2858 to be exact).