I have a low brake pedal but the pads on all four wheel appear very good
(changed about 10k miles ago).  Park pedal is also low.  Did a test with the
Park pedal lightly engaged and it did not raise noticeably the brake pedal
on a stop. Oh, fluid level has been normal with no need to add whatsoever.
Any thoughts on where to start trouble shooting?
-george, 2000 ML320