I would have suggested BMW; but doesn't Mrs. Buchanan drive one of their sports cars?
And it was Volkswagen that gassed all those Jews at Auschwitz.
Actually, while the Nazis commissioned the design of the Volkswagen Beetle, practically none were delivered before or during the war, instead the factories were used to build "Kuebelwagen", the equivalent of the Willys Jeep:
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/VW_Kuebelwagen_1.jpg/300px-VW_Kuebelwagen_1.jpg)
VW type 82 'Kuebelwagen'
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Covered_Willy%27s_jeep_Wings_Over_Wine_Country_2007.JPG/300px-Covered_Willy%27s_jeep_Wings_Over_Wine_Country_2007.JPG)
Willys MB / Ford GPW
The company we know today as "Volkswagen" came into being after the war.
GM, on the other hand built trucks for the Nazis / Wehrmacht:
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Opel-Blitz-LF15.jpg/800px-Opel-Blitz-LF15.jpg)
Opel Blitz