I would like to have a "right sidebar 2". why?
I want to have different contents in the right sidebar for example when
-website shows only articles: -> content in right sidebar: recent articles, comments, ...
-website shows pages: -> there I dont want recent articles but i.e. text, other pagelinks, ...

so I could say show sidebar2 on pages, sidebar1 on posts. (but not inner right)

how to do so? is there an easy way?
thx!

have you looked at the theme options in the 'Style & configure SIDEBARS' ?

sure, I use this function to show the right sidebar on different pages or not to show on posts
but:
I would like to have a 2nd right sidebar with different contents in it.

so i can configure them in wp widgets

I start with adding
register_sidebar(array(
'name'=>'Right Inner Sidebar2',
'before_widget' => '<div id="%1$s" class="widget %2$s">',
'after_widget' => '</div>',
'before_title' => '<div class="widget-title"><h3>',
'after_title' => '</h3></div>',
));

in functions.php, but then... no idea. or am I heading completely wrong

In the settings I mentioned, read about the settings for the 'right Inner' sidebar

yes, but I dont want a inner side bar.
maybe this helps

edit: or even right 1 and below right 2

if you want to have different widgets appear on the right sidebar on different pages, just use a plugin like widget logic

widget logic.
that works!
thx!