VOLVO 440 RADIO CODE

I have just changed the battery on my wifes Volvo.
Before I changed it I made sure I had the radio code.
Only problem is how do you put in a "7" and a "9" with keypad that only has
1 to 6 ?
Can someone help me get out of the mire!

Keith

 

next time place your mobile \cell phone on charge in the cig lighter it or a
nine volt battery connected to the lighter socket will keep the codes and
computer alive .My aerial wont even go down when the car is closed with the
phone in charge socket \lighter .

 

Hello KEITH W via CarKB.com,
On some radios the procedure is like this: Say you have a 4 digit code 7325
then press button 1 7-times,button 2 3-times and so on.