Originally Posted by Rizen

Ok, if I'm not mistaken, looking at the knobs/lights/switch panel. Directly above the power switch in the middle should be 3 knobs that are larger.

Closest to the power switch I believe should be the one, with the battery plugged in, turn on the radio and then car. Slowly turn the bottom knob a little bit, then test your steering. Rinse and repeat till your steering has the range needed/desired without the servo trying to turn past the physical limits of the car's steering mechanisms. (If it's not the bottom that does it, try the top, one should "align" the steering left/center/right, the other should reduce/increase the servo range of motion.)