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Old 09-10-2009, 12:20 PM
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Location: Raleigh, NC
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W124 300D Rear Brake Drag

Iíve noticed lately that my left rear brake pads/caliper drag once when cold. I can back out of the driveway and when I go forward there is a drag and release sensation on the wheels first rotation. From that point on that brake works fine.

I donít know when the fluid was last flushed. It doesnít look too bad right now, but I still have that task on my checklist to do to this car which Iíve had for 4 months now.

I am planning to take the rear pads out this weekend and clean the calipers. Are there caliper slide pins on these cars that need grease like on US built cars? Iím not talking about the retaining pins that hold the pads in. What else should I clean and grease to help with this problem?

Iíll check the brake hose for swelling but I donít recall seeing anything wrong last time I looked at it.

I think this car has the fixed rear caliper and I have already downloaded ď42-0160 Checking and replacing brake padsĒ off the net. Ps2cho.net is such a great resource.

If you have any comments on my situation Iíd like to hear them.

Thanks! - Brad
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

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  #2  
Old 09-10-2009, 12:32 PM
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Buy a set of brake hoses for the rear.My 1st guess is that if you have old ones that are collapsing .If you have a hand pump vac setup you can check to see if its flowing properly thru the hoses.They setup usually comes with clear hoses so you can see if you are getting bubbles thru the lines ,thus no bubbles no air.Brake open the bleeder screw while the hose is on the screw, (i believe its a 9mm open end wrench youll need) and pump the hand pump to see if you have any flow ,if its slow and air is present you have a leak in the line ,the cylinder is freezing up or a collapsing hose.Hoses if old would be my first buy. Good luck.
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Old 09-10-2009, 12:52 PM
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I don't understand how pressurized hoses can collapse. Can you explain that to me please? Thanks.
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png
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Old 09-10-2009, 01:01 PM
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Location: Northeast Indiana
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The rubber swells inward.

Consider the parking brake also.
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Old 09-10-2009, 01:06 PM
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Swelling closed, now I get it.

I don't use the parking brake while the car is parked in my garage. So I don't think it is the culprit.

Thanks for the ideas.
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png
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