Yours is the same problem that I just dealt with on my Corvette. I replaced the clutch master and slave and could not for the life of me get it to go into gear. I bled it literally for hours and ran about a half a gallon of fluid through it.

What I learned was that you have to remove the slave cylinder from the mount and hold it vertical and twist it around in different directions so that the bleeder is upside down then right side up, etc... The idea is to make sure trapped bubbles migrate to the hose. Then, you take your finger or a screwdriver and push the piston all the way in until it stops.

Now, press the pedal and pump it gently until the piston moves all the way out. Take care not to blow it out the end of the cylinder if there's no retaining ring. Then, repeat the process: turn it over and over, push it in then pump it out.

Do this a few times and then re mount the cylinder and see what it does.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250