1) If you dont think you can do the songs, dont audition. Folks will remember the "bad bass player".
2) if you think you can pull it off, do your best. Note for note if you can do it and play it solid is best. Dumb down stuff you cant play with 100% certainty. Being totally solid is better than a shakey note for note.
3) What posts #3 and 4 is the key. Chord changes, signature lines, feel, yada yada. Many cover bands dont know note for note on their own instrument, let alone bass.
4) Its an audition. Looks, gear, attitude and a general impression you can pull this gig off will probably be as or more important than note for note. If you come across as a newbie, a wierdo, or a p.i.t.a., your chances will go down. Come in acting like a pro, dont ask too many questions, dont ever critique how they play, and smile a lot.
If you ask if its note for note and you cant deliver, thats points off. They didnt ask and its a short fuse to the audition.
If they want note for note, tell em you can have it ready for the gig.
My thanks to guitarist Tommy Tedesco for his advise on common sense.