Every language has a different way of saying things. The "English" way is often even different from USA to England -- etc. So for a Greman to "correct" English pronunciation of Brands with German origins is the purest form of egotistical gnorance. Here is an example of what Germans\s should note: "The American way to PROPERLY pronounce Adidas in NOT the German way!" BMW is exceptionally bizzare, because it originally stood for British Motor Works -- so if anything Germans need to correct their pronunciation.
Where did you even get this from? BMW is "Bayrische MotorenWerke". And Feli isn't "teaching" anybody about incorrect pronounciation but just let people know how those brands were originally intended to be pronounced.