[kwilford]

I happened upon a wayward BMW 320i ('81 I believe) at the local Pick Your Part, and found that it came with an ATE master cylinder, and a really neat feature. The cap has a low fluid switch! It fits the GT MC perfectly, although the float looks like it would sit quite low in the reservoir. You would pretty much have to be out of fluid before it would close the contacts. But I plan on installing an indicator light and have it activated by the switch, since it would be better to know the fluid is very low, than to find out you have no fluid at all!

I haven't actually put it into service yet (so much to do, so little time!), but I would guess that any BMW with an ATE MC would have a cap that would fit, with the level switch or otherwise.