how do you imput code for philips cd radio in 2001 renault megane?

I had to change the battery in my renault megane 2001 and in doing so the cd radio has now asked for a code. i have the code but i am unsure how to type it in. whenever i touch anything including the dial on the volume panel beside the steering wheel i just hear beeps. the display only has code written on it and no digits beside it to indicate where i can type my code into.

john
February 2008