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Old 04-11-2016, 12:39 AM
whunter's Avatar
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,350

Clarification regarding brake booster part numbers.

Brake Booster R107, R109, W126
300SDL, 350SDL, 300SEL, 420SEL, 560SEL, 500SL*
MB# 0044306530

Brake Booster W126
MB# 0014308430
MB# 0024304430
MB# 0024306830

1976 and 1985
Brake Booster W123
MB# 0024304630
MB# 0024304530
MB# 0024302530

Brake Booster W116
MB# 0014308430
MB# 0024304430
MB# 0024306830

Brake Booster W114 - W115
MB# 0014306630
MB# 0014303630
MB# 0004304830
MB# 0004307530

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1978 280SE
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Old 06-19-2018, 12:57 AM
vwnate1's Avatar
Diesel Dandy
Join Date: Nov 2005
Location: Sunny So. Cal. !
Posts: 3,431
Post Update 2018

Someone did this to my graymarket 1984 300TD and I don't much like it because the brake pedal i so soft it just feels....'wrong' somehow although the car stops on a dime .
1982 240D creampuff 370,000 miles
1978 300CD back from the dead&1980 300CD ~ SOLD
1984 300CD KEEPER ! 430,XXX miles
1984 Euro 300TD Fully optioned SWMBO's
1974 350SLC 4 speed stickshift SOLD & missed
Krazy Kommie Ural Motos (3)
BMW Moto R60/6 Barn Find, 8,000miles
1959 VW #113 Deuxe Beetle, 36hp engine, stock
Junk, Rust, Arthritis, Crushed Spine,Broken Neck&Back
Memories &Peace Of Mind
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Old 06-19-2018, 12:02 PM
ROLLGUY's Avatar
Join Date: Oct 2007
Posts: 5,905
I didn't read the whole thread, so I don't know if the OP had positive results from this modification. My experience: I put a W116 brake booster in my friends TD. He thought it would be a nice upgrade, but it turned out to be more of a hassle than it was worth. The brakes were no better than before. He even had the booster rebuilt, but still no improvement in ease of braking or anything else. I have always thought that these cars (W123, W126 etc) had excellent brakes, so no need to modify them in any way.
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Old 07-12-2018, 03:21 PM
EricB1970's Avatar
Registered User
Join Date: Apr 2014
Location: Wichita, Kansas
Posts: 8
I have a W126 booster in my 1983 300D, upgraded it and the master cylinder when I upgraded to W126 front brakes. Everything fit well and the car stops great.
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