Question about 2007 Mercedes-Benz S550 Sedan
The procedure is as follows:--
Buy a master cylinder cap from MB.
Buy a NEW small presure sprayer at the garden department.
Buy a hose to thread fitting for the cap.
Drill a hole in the cap and put the fitting on TIGHT with a little epoxy glue to seal it.
Fluid in the sprayer, wheels off. ope the bleader on the left front caliper. Gently pump up the sprayer until fluid oooses out of the bleader. do not over presure, just enough to ease the old fluid out.
Keep bleading until the fluid turns clear, then on to the next wheel until the job is done. When finished keep the cap device by cutting the hose mid way, and THROW THE SPRAYER AWAY so that you will not be tempted to re use it when dirty next time. Make sure the fitting you buy has a nut on the back so you can really crank it tight on that cap, sealing it.
bleed the closest wheel first (shortest brake line) as suggested by service manual FrontLeft, FrontRight, RearLeft, RearRight. That is for pressure bleeding as well as the old manual way of pumping the paddle and opening and closing the bleed valves. But if you are using a vacuum pump to **** the fluid out at the wheels, then do the longest line first : RR,RL,FR,FL.
That is for LHD cars where the Master Cylinder is on the left side closest to the LeftFront wheel, so for RHD cars it would be the other way around.------------- There are two methods to exchange brake fluid; one is to force-feed fluid from the master cylinder reservoir through the system and out of the bleeders on the calipers. The other is to use vacuum to pull it out of the caliper:------ use a vacuum pump brake bleeding system; it consist of a hand operated pump and an inline reservoir.
The preferred way:
Place car on jacks and remove tires.
Open the master cylinder reservoir and, using the vacuum pump, remove all fluid and refill.
If the reservoir contains sediments:
Refill the reservoir with clean fluid; agitate the fluid to suspend sediments, and empty again.
Refill the reservoir and agitate again, if sediments are visible empty again.
Repeat until the fluid remains clear.
Note: Most brake fluids will damage your paint; if you spill any, clean it up!
Many manufactures give a brake bleeding sequence; in reality it is not very important, you can start with the brake furthest from the master cylinder ending up with the closest.
The next step is important: to prevent from ‘back flushing’ any dirty fluid, fist attach the vacuum pump to the bleeder, open the bleeder and pull about halve the amount in the master cylinder reservoir in to the inline reservoir.
Refill the master cylinder reservoir.
With the bleeder still open, and, using a proper tool, force the caliper pistons in to the fully retracted position.
Using the vacuum pump pull fluid in to the inline reservoir until it appears clear.
Important: Keep refilling the master cylinder reservoir to prevent air from entering the system.
Go to the next brake, attach the vacuum pump, open the bleeder, force the pistons back, pull fluid until clear and so on. Important: After you are finished and all bleeders are secured, pump the brakes until pressure builds up; check the master cylinder reservoir and fill to the ‘Max’ Line.
The quick way:
Clean the master cylinder reservoir as above:
Select your first brake, attach the vacuum pump, pull fluid until clear; repeat for the remains brakes.
This will be as good, or better, as any shop will do for you. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.
Posted on Jul 29, 2010
You need someone to help you.
Pump the brake several times and then hold it to the floor.
Open the bleeder valve on the caliper at the right side wheel. Air and fluid will come out. Close the valve.
Repeat the above procedure till no air bubbles come out with the fluid. Make sure the brake fluid reservoir does not get too low and lets in more air.
If after doing the right side the brakes are not normal, repeat the procedure with the other side. You don't have to do the rear brakes if you didn't change them.
Posted on Jul 29, 2010
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Posted on Jan 02, 2017
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