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Hi all. I'm pretty sure I've seen 4-piston front calipers on some W212 models, am I correct? Does any one know which trims / sub-models these were available on? Was it all sport models, 4matic, E550, etc? Also, did those calipers grip larger diameter rotors, or were they they same rotors as the models with the single piston sliding calipers?
I'm asking because I'd like to swap these 4-piston calipers onto my 2011 E350 Bluetec, for more even pad wear and more even thermal loading on the front rotors. This car just eats front rotors! I replaced them less than 10K miles ago, and they're already warped again. I'm exploring many avenues, short of upgrading to an aftermarket Brembo setup. If this 4-piston caliper idea is a no-go, I'll probably look into those cryogenically treated rotors, and change the pad compound.
search big brake kit or racing brake. 550 is only a 2 piston Caliper up front and single in the rear. They have large rotors however and stop quite well. Only AMG cars have a 4 piston caliper and they would be extremely pricey to modify to your car.
Is that why I don't feel any problem while cornering(less than 30mph anyway)? stock 17s with Potenza. I didn't know how to tell that the 17s feel fine.
Judging from how close the brake calipers are to my 18" wheels, I don't think you can fit 17" wheels with the 360mm discs that come stock on the E550.
The only sure thing is to try it.
I just tried 16" wheels from 2008 model on my 2014 E250.
THEY FIT
even 16" wheels have 12 mm lower offset. I did not drive on it, so front fender rubbing on turns is still to check, but seeing how big clearance original wheels have, I don't think it will be a problem.
Main point is >>> I HAVE A SPARE.
Hi all. I managed to build my own OEM "big brake kit".
These brakes are from a W212 4-matic. 4-piston front calipers, and 344mm discs, as opposed to single-piston sliding calipers with 322mm discs. I bought re-manufactured Centric brake components, from a Centric dealer called "Fast Undercar" in Torrance, CA.
There are no clearance issues at all, a big concern I had with the 17" wheels. The mount points and spacing are all perfect. The only additional thing required after the calipers and rotors is the brake lines are different.
I hope this information is useful to any who might want to upgrade their stock brakes. I was not unhappy with the braking performance, but I do hope the larger disc and pad area, plus the more even pressure of the 4-piston calipers, will solve once and for all the constant rotor warping I've experienced. I understand this is a regular occurrence with many W212 E-Class models.
I need to re-bleed the system, now that I found my pressure bleeder... I'm not sure if I got all the introduced air out when I first did the job. Will update when I fully flush and re-bleed the system.
There's always the possibility the pedal will just feel softer, due to the larger caliper / slave piston surface area, compared to the stock master cylinder. I didn't research if there's a master cyl difference between the two models.
I did a similar upgrade to my old Toyota Tacoma, installing the Tundra 4-piston calipers and larger rotors. Those brakes are really soft in initial bite, but very progressive and lots of power with a firm stomp. Work great offroad.
What is the issue with the brake lines? I am waiting second hand spares to do the upgrade and I am trying to be prepared... Is there some part No for proper lines? Is there issue with the thread? or what?
05-18-2017, 08:23 PM
I'd hate to upgrade to 18's, since the runflats already ride pretty stiff!
