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.
> there is a single correct pronunciation in their native language
But see, that's the point. We're not speaking German when we use a borrowed word in English. It's no longer a purely German word, despite its origins, just as "xylophone" isn't a mispronounced Greek word, nor "Handy" a misused and miscapitalized English word.
I would follow your logic if the english pronunciation of the word Volkswagen was actually phonetically consistent. But while "Volks" is pronounced in an english way, isn't the word "wagen" pronounced in a weird German way?
"Wagen" on its own would probably be pronounced like way-gen, if my english intuition is not fooling me. Instead it is pronounced like wuh-gen.
I don't really care about this either way but if you are bothered by something the weird mixture is.. a bit annoying.
