MagCL

I recently did a full brake fluid flush (ATE SL6) on my CL55 using my Motive pressure bleeder and now the pedal is softer than before. I think I may have gotten air in the system after sucking out the old fluid from the reservoir tank. I bled all brakes the first time using approx 15psi. I bled the whole system again using 25psi and only a few tiny bubbles came out but that's it. Pedal is just a bit firmer after second flush but still not right. I went through about 1.5 liters per flush.

So what do I do now?

A. Increase pressure to 30psi and flush again? (WIS says to use "greater than 2 bar" which is more than 29psi but many threads say don't use more than 20psi).

B. Remove MC and bench bleed it?

C. Is there a switchover valve that needs to be actuated during the flush like in the older benzes which is preventing the air from coming out??

D. Flush with the 2 person method?

Thanks in advance for your help.
Mike

biker349

what year is it?

MagCL

2001

Can there be somewhere else that air is trapped? ABS, BAS, ESP???

awiner

Try the 2 person method Just bleed a little at each corner.

Never has a problem with that method but have had problems using pneumatic bleeders.

MagCL

Thanks Adam. I did it with the engine on and it worked, back to normal again.