So I'm working on my dad's EBD and it has the chimes instead of the correct sound effects. I know you have to get it to #18 in the diagnostic then option 3, but for whatever reason, I can't get the machine to #18. It will get 16 in the display but never an 18. I've done this before on mine and I know I'm doing something stupid here. It's just been so long I can't remember what I'm doing incorrectly.