text: VW's Audi Recalls 28,000 A6 Cars  DETROIT (Reuters) - Volkswagen AG &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=VOWG.DE target=/stocks/quickinfo/fullquote"&gt;VOWG.DE&lt;/A&gt; is recalling  28,363 of its Audi A6 luxury cars after finding that in cold  weather states, the throttle could stick due to ice build-up,  the German automaker said on Friday.