Yes. It needs nothing to explain its contents and the meaning. Following peculiarities of Quran may be noted, please:
1. Quran is self-explanatory, it explains its meaning in the context verses, some verses preceding and some verses following of the verse in question, to make itself clear Quran explains the subjects in different verses of Quran in different styles. Its diction also becomes clear if one sees all the words of the word-roots used in Quran. Quran doesn’t need anything else in the exterior.
2. Quran corrects the history, rather history correcting it. Sure, the verses of Quran were revealed on a particular occasion, so all of it was practically required by the humans but the verses were arranged as per the guidance provided to Muhammad by G-d as to where they should find their placed while memorizing the Quran/Recitation and in the scripture that was written immediately by the appointed scribes.
3. Quran does make a constructive, objective and normative/principled criticism of the other Word Revealed, the people who believed in them and their tenets and as such corrects the narratives of Torah and other revealed scriptures of all religions of the world in some with names and others in generic formations.
4. Quran does include in it lasting teachings given to the past prophets that has similarity with Quran and also gives teachings that are not found in the past prophets and it is reasonable.
5. Quran confirms the truthfulness of the founders of other religions and binds Quran’s followers to accept them truthful and makes it one of the basic articles of faith of Islam. This way Quran elevates other revealed religions.