And in other places, as well, the air-cooled Beetle Boxer was the lead instrument in the noisy traffic concert. This is why Volkswagen advertising from the Doyle Dane Bernbach (DDB) agency at the end of the 1960's, advertising that is already legendary today, was titled "What the world loves about Germany"; it included a colorfully mixed collection of pictures: Heidelberg, a cuckoo clock, sauerkraut with dumplings, Goethe, a dachshund, the Lorelei - and a Beetle. Indeed: The Beetle acted as Germany's ambassador all over the world - with a sound that you couldn't overhear, with a presence that you couldn't mistake and, at the same time, with an appeal that was unmatched. For decades, it was the most popular imported car in the USA. And in 1967, it was on the up-and-up on the island of Nauru in the South Pacific. There, the "What the world loves about Germany" advertisement cheekily concluded, VW sales had increased by 200 percent: "from one to three Beetles." The humor. The typical Beetle humor. Although every child knew that the Beetle engine was air-cooled, in the middle of the 1960's, as winter was starting, VW took out full-page ads to caution: "Don't forget to put antifreeze into your VW." It wasn't the Boxer engine in the back that they meant. They meant the tank for the screen wash fluid, located in the front, under the spare tire - "Because we know how to cool an engine with air. Because we still don't know how to wash a windshield with air." The advertising copy writer didn't mention whether Wolfsburg was working on an air washer - but it wouldn't have surprised the Beetle's contemporaries. After all, at the time, one Beetle witticism had already long occupied a place in the German sayings: "Air doesn't freeze. Air doesn't boil over." Water-cooling in a Volkswagen? Just as unconceivable at that time as a change in the Beetle design would have been - even after it had long been considered conservative, or, yes, even outdated.