Good news ... your printer is in Apple's "Printer and Scanner Software" list in the attached Mac Print 101 document: http://support.apple.com/kb/HT4670
So yes, you can print and scan.
You may want to go to System Preferences > Print & Scan and remove your printer (using the minus sign on the bottom) and then re-add it (with the plus sign). There is probably a separate scan tab once the printer re-installs. Apple will provide the driver for you and keep it current as well.
The article says "Lion", but it's the most current, so Mountain Lion should support it as well.
having an older brother mfc-490cw i went over to the brother site and downloaded drivers for mountain lion
but after reading the aforementioned article all is working no need.