That is where I took some time with checking alot of measurements. (And got lucky that feets had alot of Benz ones laying around to measure too ) I checked around on rock auto a bunch to sorta start with since they have rotor sizing for most of thier part numbers. I just tried to think of cars that came with big brakes and started checking
I did the exact same thing. I got the deepest rotors I could find but still had to mess with the spokes on the wheels.
FYI... Rock Auto has the AMG calipers for $266 each. If you don't have a core to send in it'll cost an additional $300 but that's chump change for a guy like you.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon