"Ceramic brake disc (carbon fiber reinforced)
Each rotor about 10,500 usd front pads around 7k, and rear around 4k. Only expensive if you are on a budget."
So far I agree with everything said, but...
These ceramics are not street safe, they are for track use with brakes reaching very high temperatures, therefore in cold standard conditions are not safely operative.
If you wish to install ceramics and have brakes for a long time without dust and tip top quality power, you have to see it as it is: A system that requires new calipers, new rotors and new pads. Otherwise I agree with what you have been advised about OE pads.
Should you decide to go for the gold, and get a street safe ceramic set, you may find from most sources that you can do it for less than half what you were told. Just find on the catalog of the manufacturer of the brand you are being offered if they are really certified by HWSTA for street safe use. The set should consist of 4-piston (front) and 2-piston (rear) calipers, ceramic discs (will last you about 10 years and will be compatible with the pads, so the pads will not wear them as cast steel), and ceramic pads. By increasing the number of pistons in the calipers, the system will remain as easy to respond, and the pedal as soft (good) as it is now for normal and emergency braking. The brake power will likely increase and the distances to full stop should decrease (it does according to figures widely published). The master cylinder, and/or break pump may also have to be changed if the new system so requires it. IT IS NOT A SIMPLE PAD REPLACEMENT.
As for OE pads, MB has upgraded the pad quality (apparently changed vendors) and the new pads are better as far as shedding dust.
PS: It's the breaks... to exist two people separated by a common language: disc=rotor. So sorry.