2011 Ford F450 Super Duty Crew Cab Owner Guide 4th Printing - Page 88

Lights Daytime running lamps (DRL) (if equipped) Turns the headlamps on with a reduced output. To activate: • the ignition must be in the on position, • the headlamp control is in the off or parking lamp position and • the parking brake must be disengaged. WARNING: Always remember to turn on your headlamps at dusk or during inclement weather. The Daytime Running Lamp (DRL) system does not activate the tail lamps and generally may not provide adequate lighting during these conditions. Failure to activate your headlamps under these conditions may result in a collision. PANEL DIMMER CONTROL Use to adjust the brightness of the instrument panel and all applicable lit components in the vehicle during headlamp and parking lamp operation. • Tap the top or bottom of the control to brighten/dim all interior lit components incrementally, or • Press and hold at the first position the top or bottom of the control until the desired lighting level is reached. • Press and hold the top of the control to the full on position to activate the "dome on" feature. This will turn on the interior courtesy lights. The lights will remain on until the bottom of the control is pressed. AIMING THE HEADLAMPS Your vehicle is equipped with an aerodynamic headlamp system. The aerodynamic headlamps can only be aimed in the vertical direction (up/down) using the procedure following. The headlamps on your vehicle are properly aimed at the assembly plant and should not normally need adjustment. 88 2011 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)