Lindy,
1st label: don't know.
2nd label: coolant overflow tank; the No. 100 refers to the number stamped into the cover on the coolant tank. Take advice--make sure yours is stamped 100. Often someone gets a cover that simply fits like from Autozone. Make sure yours says 100.
3rd: This is an a/c lable and goes somewhere on the windscreen of the car, but don't really think it was appropriate for the W113's.
Michael Salemi
1969 280SL
Signal Red w/Black Leather
Restored