Don't think so.

I've had the S420 for 2 years. The brake pedal has always been a bit soft, at least compared to what I'm used to. (I also have a 94 E320 and the brake feel is much different.) I parked the S420 for the summer/fall 05 and when I took it out just before xmas, the pedal would sink all the way to the floor.

I'm able to 'pump up' the pressure, but if I do the press and hold, the pedal sinks down to the floor again.

I tested the vacuum using the key off, pump pedal until hard, hold pedal, start engine, pedal sinks a few inches method and that is ok.

Thanks for the response.