Dell Printer manual

I also found it at http://support.dell.com/support/edocs/systems/5110cn/en/index.htm

well here is a link for the 5310n model, I'm sure it can help you out - http://support.dell.com/support/edocs/systems/prn5210/ - hope this helps you out.

No such printer. 5110cn, 5100cn, 3100cn, 3110cn etc.
Their biggest color laser that they have currently is the 5110cn.

5210n, and 5310n are B&W printers.

But all manuals for Dell printers can be found on the Dell site.
Just do a search on the model.
Or you can do a search by service tag (service tag can be found on a little white sticker where you put the tomer in).