foldering mirrors and extensions for sports seats on 2008

[GPSnV1]

I did a search but probably did not use the right keywords plus forgot to get through to this part of my list of notes when I test drove a 2008 sport 4.8 2 weeks ago.

The front seats on my 2004 4.4i sport have extensions that can pull out and easily be put back in place. I have found this a useful feature. Is the same true for the 2008 sports models?

I also have folding mirrors on my current X5, but is that something that has to be ordered separately or would most 2008 models with premium, sport, winter, heated front seats, technology, etc., likely include this feature?

Thanks.