The alt is not charging - when the battery light comes on it also illuminates all other lights - its part of checking the working of the lights on every startup. The SRS and glow is not tied to it

I bet the regulator brushes are worn off. revving is not helping?

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)