I don't have a Caliber, so I don't have a work-able VIN number.......... but....... to tell if your car is E85 compatible, look at the 8th VIN number.
From what I've seen for the 4-banger motors in the DCX lineup... if that 8th character is a letter T - then it should be compatible.
I suggest you just wait for "others" (Namely those in DCX Quality Control) to test the E85 before you take the risk though. DCX should release a press release about this stuff soon once they see how the motor holds up in real-world conditions with E85.
As always, I guess you could check the owners manual