I received this dryer from a neighbor and was wondering when it was manufactured since I didn't received the manual or any other information pertaining to this dryer.

That is a model number, you need the serial number.

Ser# MR4710049, thanks

Here are manuals: https://dl.dropbox.com/u/8010163/Kenmore%20Dryer%20Manuals.zip
https://dl.dropbox.com/u/8010163/Appliance_Date_Finder.pdf