Bentley tells you not to adjust the rod in a Beetle , they didn't know about Replicas back in the day . Adjustments are necessary when the pedal stop is moved, warn etc. You adjust the rod so that there is a just a " click " ( 1/16") between the pedal in the rest position and rod contact with the master cylinder piston. This free play adjustment assures that the rod is in the rest position. w/o out that free play, you can bleed endlessly without success.