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Brake pedal goes to floor, 1996 420 SDI - riley1937
Can anyone advise with this problem on my 1996 420 SDI: the brake pedal feels soft and can be pushed gradually to the floor in about 15 - 20 seconds.

The brakes work OK but seem to have started to pull slightly to the left. I have renewed the master cylinder. There is no loss of fluid.

Help!!
Brake pedal goes to floor, 1996 420 SDI - Screwloose

Have you got ABS?
Brake pedal goes to floor, 1996 420 SDI - riley1937
Yes, the car has got ABS......
Brake pedal goes to floor, 1996 420 SDI - milkyjoe
sounds like air in the sytem
Brake pedal goes to floor, 1996 420 SDI - Screwloose
riley

That could be a leaking modulator valve in the ABS.

Try pressure-bleeding the system while activating the valves in turn with a scanner to release any debris trapped in the valve.

Some diesels do have very soggy pedals and they tend to creep as the vacuum levels change.
Brake pedal goes to floor, 1996 420 SDI - riley1937
Thanks for your advice, Screwloose and milkyjoe.
I'll check these and report back..........>> riley

Brake pedal goes to floor, 1996 420 SDI - DL
........and how did you get on Riley?

I'd clamp off each flexible brake hose to each brake assembly; if the creep can be stopped, then you can identify the culprit.

If the creep doesn't alter then it would be fairly safe to condemn the ABS modulator, if the master cylinder, as you say, has been replaced.
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