1982 Mercedes Benz 500sel keep getting air in break lines

1982 MERCEDES BENZ 500SEL
78,000 MILES • V8 • 2WD • AUTOMATIC
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LISAGIFFO
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I replaced the break pads on my merc (1982 500sel) and have bled breaks about 7or8 times. breaks work ok for short time but then fail, pedal goes to floor.when pedal pumped here sucking noise comeing from behind fluid resivore. When I was replaceing pads resivore did run dry.ABS warning light is lit up
Dec 8, 2008 at 10:29 PM
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MHPAUTOS
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Hi there,

Drop off the master cylinder you may have a faulty rear seal, check for brake fluid in the booster, the sucking noise may well be a failed booster due to the master cyl problem. start checking here.

Mark (mhpautos)
Dec 8, 2008 at 10:49 PM