Nearly all Bosch/Neff/siemens ovens with grill elements are used with the oven door CLOSED. This wasn’t so with the older style ovens where you grilled with the door open. I believe they initially had some problems with customers either :
A. Grilling with the door open as the customer would leave the handle attached , stopping the door from closing – this would lead to burnt facias and melted selector switches
OR
B: Lots of mashed glass doors where customers left the handles on and then tried to close the door