Level 1 - up to 5 change items (roll up windows with key, close mirrors with key, seatbelt reminder, etc.)
Level 2 - up to 10 change items (roll up windows with key, close mirrors with key, angel eyes brightness, seatbelt reminder, battery programming, and more)
Level 3 - up to 20 change items (more of the same as other lower levels, but also if you’re doing a retrofit that requires coding.