I've seen mention of the early vs. late 99 model and that the later incorporated some changes, and according to some on the board the Post-July cars are best, while my local P-car dealer said September was when the changes were made. My questions are:

1) Exactly what changes were made in the later production run that makes them better?

2) When were the changes made (Production month and/or Vin numbers)?

3) Are there any visual clues that differentiate the early v. late 99s?

Thank you!