Just got a 2014 Madone 4.3, with 105 components. I'm trying to determine which model number of each component so I can download the manuals. When I go to shimano website there are several numbers listed for each 105 component but nothing to indicate which model I may have and no way to enter a serial number to get a "build sheet" to borrow a term from the car world. I can't find any numbers on the bike itself.

Am I missing something?

Thanks, Fred