This is wrong. If you tap it right after each other you only get 4 blinks. The only way to get more is you have to wait until after the 3rd blink and then tap it again. Even if you hold it down you only get 4. Also I doubt you can change it in the car end and if you cant then no the dealer wont change it cause they pretty much have to re-write the code on the ECU. I use mine all the time on my Sonata. Three blinks is enough to change a lane in my book and the only time I ever click it down is when I actually make a turn.I heard on the Elantra, tap it twice and it will flash 6 times (3 flashes per tap). Might work. Tap it 3x, 9 flashes. Maybe.
Lol. Or just make your lane changes as quickly as you signals like everybody else...Just do like the other drivers out there and don't use the turn signal
If I could I would also go to 5 blinks. Sometimes I use it and I know I'll need more so when the 3rd one goes I hit it again.