Just bought a 2012 Fiesta SE model and have noticed an ever-so-slight zig-zagging at highway speeds. Seems like the electronic steering stiffens up a bit on the highway. When the car starts to drift left or right slightly, you make a slight adjustment with the steering wheel, but because the steeering has been stiffened up at highway speeds, you're actually over-correcting a little bit and therefore the car goes a little too far left or right. You then try to adjust and same thing happens again. The steering also seems like it stiffens up and then relaxes and repeats this every little bit, too. Is this a common thing for the new electronic steering system that is installed in newer cars? If it is, I don't much like it. I'm used to the older cars with a power steering pump and a belt. Any suugestions/ideas would be appreciated.