A number of people have mentioned that stainless steel brake lines firms up pedal feel on their w124/w201 cars. I haven't seen anything about w202 models, or if this will diminish brake pedal travel as well.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E