RE: ML500 2002 brake problem !
I recently bought a used 2002 ML320 Sport. The vehicle has had a soft brake petal since Ipicked it up.
I followed your instructions above as far as finding some empty highway, getting up to speed (around 60 Mph) and braking very hard. Amazingly, it worked perfectly! The petal is firm and the brakes seem to work much better than before. I was ready to do a front brake job to get a better petal feel, but now will wait for the pads to wear down. Thanks again!