Hi,
I have a 99 A4 Avant and I want a spare key - EASY - I hear you cry!

I have trawled thru so many forum pages I now need my eyes tested!!

I have a 3 button "Flip Key", I have a part No from the inside of it
4DO.837.231.A off a green label. There are other numbers, but nothing that looks like a frequency.

Any ideas where I find the frequency?

I think I saw a thread that said that "A" suffix was IR not RF, but this is not Infra Red.

Can anyone please help?

Thanks in advance