So I'm interested and got some time. I went to a tech site (techs only) and I'm looking through fixes and I came up with one I'm going to paste here. Then I'll look for some more and paste them too if there are any.

I debated whether to put the last line into the paste. Thought I might since I see the absolute opposite attitude here constantly:

After more
investigation of the brake system We find a frosen caliper
pin on the left front. It was so bad that even after heating
the bracket and soaking it with penetrating oil the slide pin
did not loosen up We replaced the caliper It fixed the spongy
pedal and brake affect is normal Oh I did ask costumer if he
had felt the pedal soft before He said someone told fim it's
becouse the car needed rear pads He did'n mentioned it
becouse I olso told him the rear pads were worn out This is
how The EVER SINCE YOU FIXED MY CAR claims start!!! One more
client that knows We are not MIND READERS

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician