The reason they provide the booklet is so you can refer to a picture number and a part with a little number next to it when you are talking to the dealer.
I don't know...It seems to me the target consumers were blonde women.....
Sounds very similar to the story I was told once:
The woman pulls into the Mercedes dealership with her car and proceeds to the parts counter....
"I need a new 710 cap for my car. It came off"
Parts guy:
"Sorry M'am, Don't know what you mean"
After more discussion leading nowhere, the guy hands her a sheet of paper and a pen..
"Can you draw a picture of what it looke like?"
The woman gives it a try and comes up with that:
..