Man erweitert unter System - Modules - Frontend - Templates: ce_accordion.html5/xhtml um folgende Zeilen:

[?php echo $this->headline; ?]
[div class="accordion_teaser"]
[?php $text1= substr($this->text, 0, 120) . "..."; ?]
[?php echo $text1; ?]
[/div]
[/div]