thanks for response and sorry for delayed answer, I was on vacation and absent to my emacs :/
An ECM would be a file just containing some umlauts. In more detail:
using emacs GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.8.2)
of 2013-06-25 on sochi, modified by Debian
: öäü ÖÄÜ
from a latin-1 buffer
: 1 -- iso-latin-1-unix (alias: iso-8859-1-unix latin-1-unix)
:
: ISO 2022 based 8-bit encoding for Latin-1 (MIME:ISO-8859-1).
: Type: charset (charset)
: EOL type: LF
: This coding system encodes the following charsets:
: iso-8859-1
with =C-c C-e l l= which results in
: % Created 2013-07-31 Mi 08:39
: \documentclass[11pt]{article}
: \usepackage[latin1]{inputenc}
: \usepackage[T1]{fontenc}
: \usepackage{fixltx2e}
: \usepackage{graphicx}
: \usepackage[normalem]{ulem}
: \usepackage{textcomp}
: \usepackage{latexsym}
: \usepackage{amssymb}
: \usepackage{amstext}
: \author{Jan-Mark Batke}
: \date{\today}
: \title{testumlaut1}
: \hypersetup{
: pdfkeywords={},
: pdfsubject={},
: pdfcreator={Emacs 24.3.1 (Org mode 8.0.6)}}
: \begin{document}
:
: \maketitle
: \tableofcontents
:
: öäü ÖÄÜ
: % Emacs 24.3.1 (Org mode 8.0.6)
: \end{document}
The file is as well encoded in
: 1 -- iso-latin-1-unix (alias: iso-8859-1-unix latin-1-unix)
:
: ISO 2022 based 8-bit encoding for Latin-1 (MIME:ISO-8859-1).
: Type: charset (charset)
: EOL type: LF
: This coding system encodes the following charsets:
: iso-8859-1
Interestingly, exporting in a buffer using =C-c C-e l L= results in
: % Created 2013-07-31 Mi 08:45
: \documentclass[11pt]{article}
: \usepackage[latin1]{inputenc}
: \usepackage[T1]{fontenc}
: \usepackage{fixltx2e}
: \usepackage{graphicx}
: \usepackage[normalem]{ulem}
: \usepackage{textcomp}
: \usepackage{latexsym}
: \usepackage{amssymb}
: \usepackage{amstext}
: \author{Jan-Mark Batke}
: \date{\today}
: \title{testumlaut1}
: \hypersetup{
: pdfkeywords={},
: pdfsubject={},
: pdfcreator={Emacs 24.3.1 (Org mode 8.0.6)}}
: \begin{document}
:
: \maketitle
: \tableofcontents
:
: öäü ÖÄÜ
: % Emacs 24.3.1 (Org mode 8.0.6)
: \end{document}
but the buffer is
: U -- utf-8-unix (alias: mule-utf-8-unix)
:
: UTF-8 (no signature (BOM))
: Type: utf-8 (UTF-8: Emacs internal multibyte form)
: EOL type: LF
: This coding system encodes the following charsets:
: unicode