Can a Google autocomplete function be libelous?

From Germany:

…for Bettina Wulff it’s a nightmare. The wife of former German President Christian Wulff wants the search engine to cease suggesting terms that she finds defamatory. This has nothing to do with the search results, but rather with the recommendations made by Google’s “Autocomplete” function, a service that is also offered by competitors like Bing and Yahoo. All one has to do is type her first name and the first letter of her last name to get search suggestions such as “Bettina Wulff prostitute,” “Bettina Wulff escort” and “Bettina Wulff red-light district.”

Don’t forget the problem of cascades here:

The Autocomplete function, the usefulness of which Google so guilelessly praises as a means of giving one’s fingers a rest, undeniably helps spread rumors. Assuming that someone unsuspectingly begins to look for information on “Bettina Wulff” and is offered “prostitute,” “Hanover” and “dress” as additional search terms — where, independent of their actual interests, will users most likely click?