Not that my "Deutsch" is any good, but I took a little in university, and have a few suggestions for you.
For one, Germans apparently like formality, so you should have started off with something like "Guten Tag Herr Foth von VWAG..." and continued on like you did, with a few corrections"...Ich bin Amerikaner und spreche nur ein bischen Deutsch, aber Ich liebe VW TDI."
I'm not sure if you were trying to ask Mr. Foth anything, but your statement doesn't say much other than "Hi, I'm an American...I don't speak much German, and BTW I love TDIs".
Not trying to insult you or anything, so please don't take it the wrong way, just trying to help.
Cheers dude!
[This message has been edited by lxluc (edited January 28, 2000).]