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R129 brake calipers fir W124??
DiseaselWeasel Offline
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#1
R129 brake calipers fir W124??
Hi!

Do the R129 calipers fir the W124 hub?? There's a whole brake setup going cheap and I'm tempted. 300x28mm, 4-pot caliper. It's of a early R129 with pressed ball joints, so no throw-away A-arms needed (just rebiuld mine), unlike with all the other MB 4-pots.

[Image: r129_bremse_320SL.jpg]

Price to pay: 16" wheels. But that's what I'm runing anyway... R129 steels, 8x16 - such awesome! Smile

Thanks!
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'88 300CD Turbo Coupé - OM603
07-07-2014, 03:12 PM
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raysorenson Offline
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Location: Birmingham AL
#2
RE: R129 brake calipers fir W124??
Yes they fit, with ball joint clearance being the issue. It looks like you've gotten that taken care of though. The 201 EVO2 came with 129 spindles. They use a bigger bearing- less flex. I'd grab the spindles too if you can.
07-07-2014, 04:48 PM
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tjts1 Offline
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#3
RE: R129 brake calipers fir W124??
I would also replace the 23/19mm master cyl and brake booster with those calipers. Your 258mm rear rotors are dinky by comparison.
[Image: 208104.png]
07-08-2014, 12:03 PM
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DiseaselWeasel Offline
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#4
RE: R129 brake calipers fir W124??
Not all R129s have fixed ball jonts, that's the whole pont Wink Te early ones, even the V8, got pressed ball joints - same as W124 Smile

Bigger bearings would also go well with the wider wheels!

As for rear brake - I have no idea yet. 320SL has solid 278x9mm apparently. Same as W124 wagon... Sounds all a bit too good to be true Big Grin
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'88 300CD Turbo Coupé - OM603
07-08-2014, 05:40 PM
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tjts1 Offline
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#5
RE: R129 brake calipers fir W124??
95 E320 wagon in the US at least had 290x10 rear brakes. They were also used on most W210s shipped to the US so I got those for the 300D. I would also switch to a 25/19 or 25/21 master cyl.
http://www.peachparts.com/shopforum/perf...grade.html
[Image: 208104.png]
(This post was last modified: 07-08-2014, 07:18 PM by tjts1.)
07-08-2014, 07:15 PM
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DiseaselWeasel Offline
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#6
RE: R129 brake calipers fir W124??
Wagon, yes. Due to possibly higher load in the rear, resp. different weight distribution. I think a SL is fairly similar to a Coupé, hence I think 278mm rear is sufficient. TÜV will tell me what I have to change anyway Big Grin

500E also got 278mm rears, but vented.

Bigger master is a good idea, I think I'll change this too.
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'88 300CD Turbo Coupé - OM603
07-09-2014, 10:15 AM
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DiseaselWeasel Offline
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#7
RE: R129 brake calipers fir W124??
R129 booster fits fine - 500E booster is better suited though, as the vacuume connection is on the other side. R129 connection is on right side - VERY tight, but fits JUST. I had to "carefully" modify the firewall a bit... Brake lines need bending to fit. Master needs to be installed before you tighten the servo - servo needs to be tilted a bit to insert the master cyl.

[Image: sl_bremse-3.jpg]

[Image: sl_bremse-4.jpg]

Calipers & discs are bolt-on plug & play.

[Image: sl_bremse-6.jpg]

But wiring harness needs to be changed also, for twin wear indicators (std. has only got one). Also plug & play. Connectors fit.

[Image: sl_bremse-5.jpg]
(pictured old mucky 24V caliper...)

Std. dust shields fit also - but I may swap them over nevertheless...

And: NO WAY do 15" wheels fit. Even W211 7x16" ET33 steels are too tight to fit over the calipers... I'll investigate more wheel fitments as soon as I can get my fingers on them. R129 & 500E wheels will fit, naturally. 8x16" ET34 15-holes, 8-holes and 8x16" ET35 steels.

As per R129 I'll change to wagon rear calipers with 278x9mm solid discs. Dust shields (I have a Coupé w. 258x9mm std. rears) will need replacing (PITA!!) or modifying. 278mm discs don't clear the std. sedan/coupé dust shields. Unless the vented or non-vented 278mm discs are allready fitted (M104).

Result: I need to throw up when I stomp the brakes... But they'r still not "aggressive" like modern brakes and allow very comfortable breaking & good dosage of stopping force. Very nice!
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'88 300CD Turbo Coupé - OM603
08-24-2014, 07:42 AM
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the D Offline
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#8
RE: R129 brake calipers fir W124??
Do the r129 brakes fit the w124 arms properly if you use the r129 steering knuckle? Or is there something weirdly specific about the arm/knuckle/brakes as an assembly as opposed to piecing stuff together? I hope these questions make sense...
11-06-2015, 08:49 AM
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capflya Offline
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#9
RE: R129 brake calipers fir W124??
The rotors being thicker tend to hit the A-arms. I used a grinder and made clearance on mine to fit the 400E brakes in the front. I now have some late w124/R129 spindles and steering knuckles which should make everything fit better.

If you have a '93 300D I think your A arms have the welded ball joints that aren't replaceable, so the larger brakes should just bolt on. You can check the EPC with your car's VIN, it might have the R129 steering knuckles and spindles already. I forget what year they switched to all of that. The calipers will bolt right up no problem, the issue you will have is the rotor hitting something.


'98 E300 Turbo "Juliette" - Brabus wheels and almost all the options a w210 could have
'87 300D Turbo "Roxanne" - #22 head - 400E brakes - EGR Delete - 17" Staggered AMG 5 spoke rims from CLK500 - 5 Spd manual
2007 Chevy 2500HD CCSB Duramax with about 400-500 rwhp depending on the tune I use Big Grin
1983 300D Silver Exterior/Black inside - Sold and will be missed, may we never meet in a PnP.
11-08-2015, 02:45 AM
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DiseaselWeasel Offline
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#10
RE: R129 brake calipers fir W124??
The R129 300mm roto clears any a-arm. Welded a-arms are only found on cars with M104 or M119 engine with 320mm brakes.

All you need to fit R129 300mm disc & caliper to a W124 is: calipers & discs. And if you want it done properly, master, booster and the pad waer indicator wiring loom (also plug & play).

The later 320mm brake requires welded ball joint a-arms again.
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'88 300CD Turbo Coupé - OM603
(This post was last modified: 11-09-2015, 01:57 AM by DiseaselWeasel.)
11-09-2015, 01:57 AM
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DiseaselWeasel Offline
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Posts: 420
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Location: German SSR of EUSSR
#11
RE: R129 brake calipers fir W124??
300mm brake - std. a-arms
All other 4-pot brakes - welded ball joint a-arms...

It's realy not that difficult...
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'88 300CD Turbo Coupé - OM603
11-09-2015, 12:25 PM
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the D Offline
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#12
RE: R129 brake calipers fir W124??
Awesome, thanks dw
11-09-2015, 01:53 PM
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