Genesis E/S series grills were side knob from '07-'10, and front from '11-present.
If it has the side knobs, it has to be a 310 (3 burners, no extras) or 320 (3 burners, side burner). The 330 (3 burners, side burner, Sear Station) started with the front knobs.
Igniter kit for that grill is around $25.