@Crash As much as I personally, as a language geek, am a stickler for accuracy and good pronunciation, I'm with you on this somewhat. When pronouncing a foreign car company one ought to be considerate. If a foreign person is trying to pronounce any English word one ought to be considerate, for example. I try to get the foreign ones right but I know I don't get Renault or the Korean manufacturers correct
Even with the AmE and BrE versions of Jaguar, the American one isn't 'wrong'. Where do you draw the line? The bath/grass argument even within BrE, for example. Neither is incorrect.
Now, personal preference is another matter. I might find Jagwaar grating from some American accents but again, that doesn't make it wrong. Not wrong, just different.