I didn't know this.
http://www.hindustantimes.com/Autos/HTAuto-MoreStories/Volkswagen-makes-hit-sausages/Article1-1005868.aspx13/3/2013
The trademark dish that is made at a bakery in VW’s Wolfsburg factory since the 1970s are branded as Volkswagen CurryWurst, curry for ketchup and wurst for sausage. Though a classic Currywurst consists of pork meat, the one made at VW consists of a secret special spice mixture that makes it unique. VW also offers a vegetarian alternative.
In the lower Saxony region of Germany and capital Berlin, the sausages have become so popular that in 2012, VW made 6.4 million of them — more than cars at 5.74 million units.
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“We want to expand it to other countries as well. There are requests from other European countries as well as countries all over the world like Brazil, China and India,” said a VW AG spokesperson. “The problem is that it is not possible to export the Currywurst into non-European countries. Therefore a manufacturer is needed that can produce the sausage after our recipe, which is a secret.”
Volkswagen uses only German pork of stress-free breeding pigs to create the sausage. “Further instead of the common 45-55% fat, we only use 20% in our sausages,” said the spokesperson.