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Old 01-23-2013, 11:17 PM
Chief Village Id10t
Join Date: Aug 2010
Location: Houston, TX
Posts: 356
Source for W126 brake booster line

I have searched the webstore of the sponsor of this forum and other known Mercedes parts websites for a new brake booster vacuum line for my 1986 300SDL, The little white/black plastic valve in the line (which also provides vacuum to the engine shutoff) is broken. I have been told that you cannot buy the plastic part alone; you must buy the entire line.

Is this true? If I can buy just the plastic valve, where are they available? I see that there are people producing the entire line new for sale on a very popular auction site, so there must be a source for the parts. Any help would be appreciated.

Mike Frederick
1986 300SDL, 240K+ miles
1985 300D KaliKar, 270K+ miles
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Old 01-24-2013, 11:36 AM
Registered User
Join Date: Sep 2006
Location: Middle TN
Posts: 3,703
Pick up the phone and call. They have access to lost not listed. I spoke to one person who knew what he was talking about.
85SD 240K & stopped counting. 84SD 180,000. Thinking of painting both.
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Old 01-24-2013, 01:07 PM
Registered User
Join Date: Nov 2001
Location: North Central Kentucky
Posts: 1,068
My experience has been that the black plastic line is so brittle that you could not get it apart if you wanted to repalce the valve. I just went ahead and bought a new line from the dealer. Not cheap, but it fit and worked. Seems to me I paid around $50.
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Old 01-24-2013, 02:24 PM
whunter's Avatar
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,357

For your 300SDL it is:

MB# 1264303029


ASE Master Mechanic

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Heat exchanger durability.
HV-A/C Climate Control.
Prototype Vehicle build.
Prototype Fleet Durability
Prototype vehicle instrumentation.
Technical Quality Auditor.
Automotive Technical Writer

1973 300D
1973 309D - stolen
1978 280SE
1980 240D
1983 300D
1984 190D
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