Date registered: Oct 2005
Vehicle: SL55, 300SE, GL450, Daytona 955i
Location: Lincoln / Boston - MA
Mentioned: 6 Post(s)
Quoted: 299 Post(s)
The brake and SBC has nothing to do with ABC.
Humming at idle is ABC issue, that require damper to be replaced.
Pulsation in SBC pedal is probably an indication that you need to replace the SBC unit soon.
Mercedes-Benz, W140 S Class S320 (AKA 300SE)
Mercedes-Benz, R230 SL Class SL55 (///AMG)
Mercedes-Benz, X164 GL CLass GL450
Triumph Daytona 955i
R129 SL Class SL500 (passed on) - W163 M Class ML430 Designo (for sale) - W140 S Class 500SEL(sold) - W140 S Class S320(sold) - W140 S Class S500(sold) - W140 S Class 500SEL(sold) - W201 190E 2.3(sold)