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...coupe, I read the manuel? And there are no child locks on a coupe, what could be the problem The doors open fine from the outside.

 
Rep Power: 0

90% says there is a break or a snag in the linkage connecting the inner door handle and the latching mechanism... if you are brave you could take the door panel off and look for it. Otherwise I suggest taking it to a dealership or body shop and ask them

 
Rep Power: 0

sounds like the linkage to the latch mechanism dropped or completely broke......bring it to the dealer as it is most likely still under warranty....messing with it will void the warranty