LF burner of Whirlpool smooth top range not working

The left front burner of my Whirlpool smooth top range stopped working a couple weeks ago. The model number is GR399LXGB2. I’ve found the switch and burner element. I could buy both and replace both but is there an easy way to narrow it down to one or the other? Where can I find out how to get to the burner elements? I haven’t been able to find a service manual online. I see 2 screws on the underside of the cooktop surface but I’m assuming there’s more to getting underneath.