The other, friend of mine brought his 2000 Beetle 2.0 manual over, complaining about some brake vibrations.
Drive the car, felt some slight vibration under light braking. Did a 60mph harder braking, when brake pedal 'fell to floor'.
Pedal is firm when cold.
Time for change out the brake fluid?
Is the Beetle using standard (DOT 3, 4 or 5) or the special VW/Audi (expansive) stuff?
When changing: Suck out with hand vacuum pump from bleeder on all 4 corners?