W114 Brake caliper identification.

1968 - 1976: 220, 220D, 230, 230.4, 230.6, 240D, 250, 250C, 250CE, 280, 280E, 280CE, 300D
Post Reply
gav
Dernburg Wagon
Posts: 5
Joined: Tue 09 Jan, 2018 12:19 pm
Model you own: w114

W114 Brake caliper identification.

Post by gav » Wed 09 Jan, 2019 12:50 pm

Hi OzBenz Folks,

I am looking to replace the front and rear brake calipers due to pitting of the slave cylinders, and have had some trouble identifying the correct ones for the car.

Model:
1972 W114 /8 Sedan 250 2.8Litre M130

I have used the ATE Online parts catalogue (http://www.ate-brakes.com/catalogues/online-catalogues/), but for ease of pasting URLs I will use https://www.qp24.de/parts/brake-calipers as the search parameters are part of the URL. I have checked that both sites return the same results.

In short, the recommended calipers are not the same as found on the vehicle.
W114 - Caliper-Front.600.jpeg
W114 - Caliper-Rear.600.jpeg
https://www.qp24.de/parts/brake-caliper ... e-8/349782
Ate-Merc-Wrong.jpeg
It is obvious the front calipers have 60mm piston diameter, where the recommended set has 57mm.

Looking at other W114 models it became apparent that using 230 and 280 (in place of 250) as search parameters offers the 60mm front calipers I am looking for.

https://www.qp24.de/parts/brake-caliper ... e-8/349715

The problem is that there are two types of rear calipers, both with 38mm piston diameter. There appears to be no further information on the physical specifications, so the only option is to identify these visually,
Ate-Merc-Correct.jpeg
So the questions are:

- Is it sufficient to identify the rear calipers visually, are the ATE images a reliable definition of the product ? (I should probably ask ATE this one).

- Are there any major differences that could cause a problem (different bolt spacing, disc width or disc diameter)? (It seems obvious that the brake line coupling is located differently, but this is probably a minor issue).

- More of a curiosity, but why would the different caliper models be priced so differently ? (Not between front and rear, but between the different types of front and rear).

Cheers,

gav.
You do not have the required permissions to view the files attached to this post.

User avatar
Bartman4800
300 SLR
Posts: 2092
Joined: Fri 10 Oct, 2008 12:10 am
Model you own: w111
Location: Perth WA

Re: W114 Brake caliper identification.

Post by Bartman4800 » Wed 09 Jan, 2019 4:27 pm

If you go to your local brake specialist, they should be able to get the pistons and seals to rebuild them.

I did my own, using Perth Brake and Clutch parts.

There are different widths of calipers, which accommodate ventilated or solid rotors.


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

User avatar
John Green
OZBENZ Admin
Posts: 6760
Joined: Mon 20 Jun, 2005 3:49 am
Model you own: w112
Region: Australian Capital Territory
Location: Canberra-center of the known universe
Contact:

Re: W114 Brake caliper identification.

Post by John Green » Thu 10 Jan, 2019 9:38 am

Hi OzBenz Folks,

I am looking to replace the front and rear brake calipers due to pitting of the slave cylinders, and have had some trouble identifying the correct ones for the car.

Model:
1972 W114 /8 Sedan 250 2.8Litre M130
By "slave cylinder" do you mean the pistons? These are chrome plated and if the brake fluid changes are not done regularly then the water int he fluid eventually lefts the chrome. You can get new pistons and you can get seal kits.

The series one W114 250 had 57mm calliper pistons, yours is a series 2 car so has the slightly larger brakes with 60mm pistons. This is why the online catalouges are wrong. You are always best off using the MB EPC
M.B Spares & Service 14-16 Lyell St, Fyshwick ACT. Ph 02 6239 1099

http://mbspares.com.au - Supporting Australia's Mercedes-Benz Enthusiasts.

Post Reply

Return to “W114 and W115”