which buttons on my grundig car radio represenr which numbers for coding?

I have a Grundig radio in my Vauxhall Frontera. I know the code but don't have a radio manual. Having disconnected the battery, I now need to enter the code which contains numbers greater than those shown on the preset buttons. I assume this means that some of the other buttons on the radio have a value for the purposes of entering the code. Can anyone halp me? The model type is SC 303 D (C)
peter livingstone, November 2004


done
I bought car yesterday (MB) but radio is SC303 (Opel). Radio are working. I´m three times not correct started with machine.
And all times we start machine from the other car. After that will appeared in display SAFE E. What want I do. Thank

Sulev, December 2004
code 10 will show on left use 1 preset for first code, 2 preset for 2 code number and so on, then hold [as ]button till radio beeps, dont have code for mine but found how to enter it!

art, November 2004
link Click here to see other fixes for Vauxhall.