I bought the two-volume Crossfire manual. I have the manual on CD for my A4 and can say after putting a new stereo in the Crossfire over several weekends, I much prefer the books since I can flip through them right there without running to my computer and printing off relevant pages.

The toll-free number inside the shop manual is 800-890-4038.

Web address is www.techauthority.daimlerchrysler.com.