The intermentant pedal fade is from the position of the piston in the bore, the disturbance of the gobbley goop and the amount of pedal apply pressure your Big ole right leg and footsey apply.
And if you take your Benz to Midas for brake service, shame on you, the devil will get you.
And you should check this out, I could be so off that it might be the wrong air pressure inthe spare tire.
Happy Trails Beep Beep from wild guess Houston!!!
Donald, El Cheapo