Fuel savings of 10-15 in cities with PSA Peugeot Citrons &lt;b&gt;...&lt;/b&gt; Jean-Martin Folz, CEO of PSA Peugeot Citron yesterday unveiled the Groups new Stop  amp; Start system at a ceremony in Paris attended by Serge Lepeltier, French Minister of Ecology and Sustainable Development, and Patrick Devedjian, French Minister of 