You might want to try looking at
www.linuxprinting.org, which has, among
other things, driver recommendations for specific printers and lists of
features that are known to work/not work in Linux. For this printer, it
ends up pointing to:
http://www.openprinting.org/printer/Brother/Brother-HL-5250DN
They are recommending a Brother-specific driver that you need to
download and install.
--Greg