Earlier quoted context omitted.
Well you claimed that Americans are pronouncing it "perfectly correctly," and Germans might disagree. It's a German word which has been Americanized. The company mostly doesn't care, but there is a single correct pronunciation in their native language. Insisting you are correct mispronouncing a foreign word because the letters look a certain way is just hubris.
Americans are pronouncing the English word Volkswagen perfectly correctly yes. BECAUSE THEY ARE SPEAKING ENGLISH
Either...
A) It's not an English word, it's a name. A German name.
or
B) You're misspelling it. The English (at least the American) word you're looking for is "Volkswagon".