Read here in the Wolfsburger daily newspaper that VW has chosen a proposal from a Wolfsburger Dipl.Ing. as the idea of the year. For the leak test of the VW model, vacuum is generated in the passenger compartment, the ventilation is placed on circulating air and the classic vehicle parts such as windshield, spray wall in the engine compartment etc. are sprayed dry artificial fog. The leak is then shown where the fog penetrates into the interior. Compared to other analysis methods by means of Ultr aschall or spray water the Rohjahn’s fog method has proven to be more precise, faster and more cost-effective. The time for testing a vehicle has been reduced by 1/5. VW saves with the fog method annually around € 350,000,-. Well, I hope that in the future one can expect from really waterproof VWs, because in the past, I have to say it as a Wolfsburg VW fan unfortunately, that was not always the case!