The serial number normally begins with an "M" or a "V", followed by a six digit number, so it will be in the form M123456 or V123456.

It's usually given on a white label that is stuck to the outer casing of the radio. It might not necessarily actually say serial number so just look for a number which is in the form as described above.

If you manage to find the serial number please post here again with it.

Oh dear!

Don't recognise any of the numbers, I'm afraid. It could be "034917", it's the right number of digits but it has to be preceeded by an "M" or a "V".

Is there no other label on the radio? You need to look all round the casing, including the rear and underside. Labels can fall off, of course, but it's very unusual. What year is your Ford Focus?

The radio shown in this YouTube video has a typical label giving the serial number on it's rear panel:

www.youtube.com/watch?v=T5fsv0kcuXY

On doing a bit of research I came across this website. I have only looked at the Cached version because my Internet Security shows this to be an undesirable site, so please do be warned:

webcache.googleusercontent.com/search?q=cache:FKhT...b

The radio details people have given here are in exactly the same form as those you have given. I believe that C7E3F0547A3299673 the VIN number of your car, and I suspect, but can't confirm, that someone on this other site has obtained the Radio Keycode from the VIN Number.

I can't do this, I'm afraid. You need access to the Ford database, but I do know it's possible.