breakpad change 450SL -73

Well that's the short answer. The long one:

1. make sure the brake fluid reservoir is not full- when you push back the pistons to change the pads, the fluid returns to the reservoir and will squirt out. The fluid goes down gradually as the pads wear, so as long as no one has added fluid, there should be room for the fluid to return safely.
2. Spin the front tires and listen for noise from the wheel bearings. A smooth whirring noise is the sound of bad front wheel bearings.
3. Remove the wheels.
4. On ONE SIDE ONLY, knock out the brake pad retaining pins and remove the anti-rattle plate. Using a large pair of water-pump pliers, squeeze the pad toward the caliper (one jaw grabbing the pad by a retaining tab, the other against the outside of the caliper on that pad's side). Squeeze steadily until the pad moves away from the disc. Then insert a large screwdriver between pad and disc, prying against the center of the pad with the tip of the screwdriver (to keep the pressure on the piston even). When the piston is fully retracted, lift out the pad.
5. With the pad out, clean out the corners of the caliper where the pad fits. Brake dust and rust build up there. DO NOT blow out the dust. DO NOT breathe in the debris.
6. Insert one new pad. It should slide in easily. If it does not. make sure the piston is fully retracted and if needed, clean out the caliper recess again.
7. Repeat for the other pad, then install the retaining pins and anti-rattle plate.
8. Do the opposite side of the car. Reinstall the wheels, and before driving the car, pump the brake pedal NO MORE THAN HALFWAY a number of times to push the pistons out until the pads are firmly against the discs. Check the fluid. Road test the car, using the brakes gently at first.

That's it!

Bill Ditmire Ditmire Motorworks,Inc.

Thanx for a good absver... I spent the last 3 hours with the car..with your answer in my head...

Not lookin too good...one of the pistons is very hard to push back. The rubber is damaged... I guess im looking at more repairs....lol...

/ Magnus

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