What should be mentioned in enclosure ?

Hello,

I have a quetion about the enclosure-part of the motivation letter.

Together with my motivation letter, I have to send several other documents, such as CV, references, list of grades, copy of passport, statement of financial resources... Should I mention Enclosure:... in the end of a motiation letter? If so, do I have to mention all documents that I send, or only selected ones (CV, references, list of grades)? I hope someone can help me.