C-Line switch for electric step with isobox + cover frame black. Switch for the electric step in the C-line series The C-line step switch is specially designed for the retractable step in the motor home and caravan. Extending and retracting the step To extend the step, press and hold the lower part of the switch. Release the switch to deactivate the extend function. To retract the step, press and hold the upper part of the switch. To deactivate the retraction of the step, release the switch.