this is required by the German law and is related to a judgement form May 12th 1998 -312 O 85/98 liability for links
The court in Hamburg ruled, that you are responsible for the content of links which you use on your site. To protect ourselves from the content of the links, we are declaring that we have no impact or influence on these sites. Www. Steifffreunde.de is declaring that we have no influence on the content of the links on our website , this declaration is for all the links on www.steifffreunde.de.