Around 300 years but there has been record of a few that lived over 400.

As I said, most of the Dunmer live somewhere between 200-300 years. Only mages tend to live longer thanks to magic.

To be honest, I´m taking this from Altmer lifespan, where is said, that 300 years old Altmer is considered very old. So Dunmer should have similar lifespan.

So his parents were probably young adults during the events of Morrowind? Perfect

It's Queen Barenziah that sticks in my mind, I might be wrong but I'm sure she lives to over 400 years old.

But now that I think of it even if the average natural lifespan for a Dunmer is around 200 -300 years I bet a LOT of them die younger beacuse of how so inhospitable Morrowind is and how hard the quality of life is there. 

Might be 300 to 400 years. I´m not really sure right now.

Thanks guys. My Morrowind is GOTE but doesn't have Shivering Isles 

Is Skywind a mod or a stand-alone game that you have to buy?

Shivering Isles is an Oblivion expansion. Morrowind expansions are Tribunal and Bloodmoon.

Skywind is a free mod that remakes and updates Morrowind with the Skyrim engine but you need both Skyrim and Morrowind as well as all the dlc for it to work.

OK thanks. Also: d'oh! Sounds like Oblivion is worth playing just for SI: is that right?

Eh It's ok, I never was a huge fan of Oblivion.

I am huge fan of Oblivion. I would really recommend it. While it doesn´t have lore and story as great as Morrowind, Guild Questlines are better on the other hand.

Shivering Isles are the best Expansion yet, but I would say it isn´t the only good thing about Oblivion.