[Jastel]

Those stupid trap doors...just had to zip tie one of mine shut today.
Never even used the a/c one in my life.

Just remove air intake thing and lean down...no need to jack up etc...unless you want to put a pan or funnel etc to catch water...but it goes everywhere anyway...kills the weeds.
One tip is put some rubber grease on the tap and on your rad bottle cap/thread makes them easier to remove.

The bottles do discolour after time...acid helps a bit but its messy...and never gets in all corners either...if it bothers you get a new one.

Any type of new coolant has gotta be better than old coolant...just dont mix colours.