Wanted to top off the coolant.
I searched a few posts on antifreeze and the consensus seems like 50% think any non bmw brand will work and 50% will only go with BMW coolant and if don't you're insane.

Well my 2 cents.

Called NAPA. They have Pentofrost for about $11/1.5 liter.

They also supply REEVES BMW around here.
And its blue
And it ticks off the major points notated in the service manual.
Oh and its made in Germany. No car maker is going to produce their own antifreeze...