Quote:
Originally Posted by thinfilmboy
Hi Everyone,
I was wondering if someone could tell me if the brake master cylinder from an S or SL Class (say an R129) can be used for a W124? Would it be a direct fit? Would there be any benefits to doing that? Would the calipers and assembly need to also be changed, etc...
I have a 1995 W124 and am about to order a new master cylinder and noticed that the heavier model master cylinders look pretty much the same except for an additional orifice that can be plugged up. I'm wondering if there might be any benefits to getting the larger bore master cylinder.
Thank you!
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To answer first question, yes. It will just bolt on and work with existing calipers.
The larger booster/master cylinder pairs from the 400E/500E is shared across W126/R107 after 1983, R129s except the V12s, W140 V8s, and the 190E Evo II.
Here's a table:
I've personally paired a 300SE master cylinder/brake booster set to my 4 piston 400E brakes on my 190E chassis. It was a direct fit/upgrade.
I wouldn't just change the master cylinder or the brake booster alone. I would match them up together. So if you wanted to replace the master cylinder with a larger one, go ahead and get the booster with it.