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Old 08-05-2017, 09:47 PM
1987 190DT
Join Date: Jul 2017
Location: Bay Area
Posts: 9
W201 Brake lines

If I only replacing 2 rear brake lines, do I have to bleed all 4 corners or just the ones I replaced? Thanks

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Old 08-05-2017, 11:38 PM
compress ignite's Avatar
Drone aspiring to Serfdom
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
It is Possible to only need to bleed the back two


You'll end up bleeding all four (In the correct sequence)
'Cause you'll not be able to keep the AIR out of the rest of the system.

It REALLY not that big a deal to do it correctly.
'84 300SD sold
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Old 08-06-2017, 01:34 AM
1987 190DT
Join Date: Jul 2017
Location: Bay Area
Posts: 9
Lately, I've been working on my cars alot. Just wanted to know if I can get lazy, lol.
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Old 08-06-2017, 09:16 AM
Registered User
Join Date: Jan 2012
Posts: 7,515
The rest of the "system" ( front brakes ) will be unaffected by bleeding the rear. Many times the replacement line can be bled at the last connection in a pinch.

It is good practice to bleed all wheels not because of air, but to change fluid through the entire system as regular maintenance.

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