When I got my car, it came with a small manual for the radio which was indispensaible. I got one for the phone as well, I believe. I haven't found them online so I'm glad I got the booklet.
If I have time, I can try to scan in the booklet and post it here. But I don't know exactly how many models of radios there are so no way of knowing if my pamphlet is useful to how many other people.