Radio Code

[Lawrence Bardfeld <LB6116@PITCAIRN.com>]

A few days ago I replaced the battery on my S4 ('93).  So now I have 
to enter the anti-theft code number on the radio (original "Audi BOSE" 
system).  Which the PO didn't know, and the dealer from which the PO 
purchased it new says it doesn't have in its records system.  I'm 
therefore resigned to removing the radio, in order to get the serial 
number, so a dealer can then give me the code.  But one thing 
completely confounds me.  The manual says: "Use station buttons 1 to 4 
to input the code number . . . . Use button 1 to input the first digit 
of the code number, button 2 to input the second digit, and so on." 
[Duh]  Then it continues: "For technical reasons, the first digit can 
only be a 1 or left blank.  The following three digits, however, may 
be any number from 1 to 9."  What confounds me is not only how I might 
be expected to leave a blank first digit, if necessary (do they mean 
just enter 3 digits instead of 4?), but how I could be expected to 
enter any digits from 5 through 9 using station buttons 1 to 4.  What 
am I missing???

Larry Bardfeld