$('#s3').cycle({
            fx: 'fade', 
            pager:  '#Ebene4', 
            pauseOnPagerHover: true, 
            delay: 0 /* initial delay before slider starts */ 
     });

$('#Ebene4_Pause').click(function() {
           $('#s3').cycle('toggle');
           var obj = $(this); 
           if (obj.hasClass('pause')) { 
              obj.removeClass('pause').addClass('play'); 
           } else {
              obj.removeClass('play').addClass('pause'); 
           }
     });