There's a feature on the Elantra MD/UD that isn't even mentioned in the owner's manual. It's a three-blink lane change indicator. If you touch the stalk once, in the direction of your lane change, the indicator lamps will blink three times and then self cancel. 

I find this very handy. It's becoming available on more and more cars. I've had it on one of my cars for 8 years.