This is a common problem with the stock deck. My dealer would not help, (allegedly, it is not designed to play CDRs. The deck was designed for 1995 intro, so the deck is probably 1992 or 1993 technology).
I took it to the best repairperson in town. His was unable to help. There are no trim adjustments to make to help it track better. Some CDRs work better than other. Phillips seemed to work the best for mine.

I'm running my cassette right now until I decide what I want to buy. The Alpine 7563 seems like a good unit if you like the styling.