With six weeks to go before the biggest change in Europe's motor industry in decades, dealers and manufacturers are at odds, Automotive News Europe said. The two sides are battling over the standards manufacturers are setting for dealers and authorised repairers when the industry's block exemption from EU competition law ends in October. The European Commission has demanded that BMW, Volkswagen and Citroen produce written responses to complaints from dealers about the way they have handled their new contracts. Opel dealers have also complained to the commission.