Rear AMG Caliper Upgrade?




2017 c43 (as well as c300), has 320mm x 24mm rear rotors from factory.
w205 c63 and all variants have 360x26. drawings below to see offsets and what needs to be changed. essentially c63 has thicker rotor hat and different offset. i am estimated the knuckle of c63 to space the caliper about 4mm forward vs the c43.
essentially the offsets are different so using your custom rotors, all you would need to do is make a custom rotor hat for the c300/400/450/43 all of them are the same. and you can use a c63 w205 friction surface and we have a brake upgrade. the caliper with proper rotor offset would just bolt up.
some 18" wheels will clear these brakes and all 19" wheels will clear. e parking brake is plug and play with below harness from c63.
c43/450/400/300 w205 rear rotors dims.
c63/c63s w205 rotor dims.
oem w205 C63 caliper. this is same caliper on w205 c63, c63s and c63s with carbon ceramic brakes. they just paint it different. also i believe this caliper is on the s class and a few others.
mounting the bracket for c63 brake caliper on my 17 c43.
w205 c63 rear caliper mounted on my 17 c43.
pad difference between 17 c43 and 17 c63 rear pads.
e parking brake motor connection.
e parking brake motor.
part number for wiring harness needed to connect c63 w205 e parking brake to c43 wiring.
c43 stock ugly rear brake.
The Best of Mercedes & AMG
brembo "OEM" 2 piece rotors and oem calipers. I will be using porterfield racing r4s pads
. Still working out some clearance issues on the rear but i pretty much have everything figured now! Best part is it will clear some 18" wheels if you prefer. But i ended up upsizing winter tires and will run 19" wheels. If anyone is interested in getting this setup let me know. Not super cheap but performance is there. and as far as oem brembo upgrades go it is relatively cheap.
i looked into all of this and even bought a c63 caliper. if you have the stock 18" wheels, the c63 rear does not clear. it even wont clear the front wheels that have same size rotor.
the slc43/cla45 rear caliper has a much different offset, and no wear sensor mounting.
my plan is to machine a cover. affix with jb weld, and then paint front and rears red. this isnt a true track car. if it was for me, id get 19" wheels and put the c63s red calipers on and call it a day. but you will need to space out the c63 calipers by 4mm it looks like. everything else was bolt on and plug and play.
The costs definitely add up really quickly even though it’s a bit here and a bit there accumulating the parts required.
Depending on your source for the parts prices vary quite a bit, but I do not see anything less than $6k for the project - which is essentially a 390mm Front and 360mm Rear 2-piece rotor setup - a real alternative to an aftermarket caliper kit although I don’t expect too many will want to spend that much on brakes. Those who do are “outliers” as one guy once called me on this forum.
I find projects like these fun.
these front calipers(dual calipers actually) are often found for $250 each on eBay. I set up a pair on my 2002 cl class. A friend set up a pair on his 166 Gl class for cheap on his. Often times some of the steel 390mm rotors are very cheap
however this is a fairly heavy braking setup, adding weight is almost never favorable in performance cars. But it’s the cheapest option
However it's still not as easy as you mentioned unless you don't care to retain the parking brake (which is generally not recommended), and replace it with traditional 4 pot rear calipers.
Hello, I have installed the rear C63 brake kit (w205) to my c300 2016 and it's throwing up codes and the rear offset is incorrect which causes the caliper to rub against the rotor. We haven't applied washers yet to the rear calipers to correct this.
I have attached the correct harnesses to the car, and I cannot recalibrate the rotors due to the codes on the dash every time I try clearing the codes they just come back on the dash and throws me out of recalibration. Here are the codes it's throwing
would there be any interest in me machining covers that you can affix to the caliper. id need to figure out how the oem fixes the cover to the caliper. but it looks like the same overall design. ill look into the slc43 rears as well. maybe those are cheaper.
Just finished the rear and front c63s brake upgrade on a c43!
Rear takes sl65 black series rear rotors and you must modify the rotor hat. Unfortunately this upgrade will not work on c63 due to offset. sorry c63 guys. you would need to make a completely custom hat to use these brembo 2 piece rotors. These sl65 black series 2 piece rotor hats are steel oem to accommodate the drum parking brake on these older cars with mechanical parking brake. This is not needed on newer cars with electric parking brake. I also had to replace wiring, brake lines, and modify oem dust shield. But it all is pretty much bolt on and plug and play with c63s parts. You must run 19" wheels or special 18" to clear these brakes! for the front, i machined brackets and used oem dust shield. replaced brake hose with c63 hoses and everything else was bolt on for the 390mm rotors! these will only work with 19" wheels.
I am looking to get a group together to make these rear hats out of aluminium to save about 4 lbs per corner! You can just upgrade the rear brakes if you want the look but IMO the fronts being larger look great and perform great as well!
Can you give us more specific description of the parts used.
Last edited by Graycat305; Nov 1, 2024 at 11:15 AM.
Improve the look of the sad OEM rear brakes. Complete the look to match the front AMG calipers.
Also wanted to share a photo from another owner who's done a great job with the covers in yellow.
Yeah it’s a shame MB neglected on our rear calipers. I’m still producing the covers and have available stock. I’ll send you PM on details.
thanks.
Henry





