Sorry, my final line gave the impression that the hatch didn't need to be replaced, it DID need replacing but the car was returned to Germany (I was told) to investigate another problem and the car was replaced. At that time, (a few months ago) there was a waiting list for the rear hatch.
If they are replacing the hatch, that would make it NOT normal. It still needs to be checked by the dealer. It is not uncommon to be back to the dealer when purchasing a new car. Be glad it is happening now instead of a the 26,000 mile mark.