FORD 2003 F-550 v.2 - Manual (Page 56)

Running lamps
Illuminates when the headlamps or
parking lamps are on.
This provides additional visibility of
your vehicle to other drivers on the
road.
Fold-away mirrors
The mirrors can be manually folded forward or backwards for narrow
spaces like driving through an automatic car wash or backing out of a
garage with the trailer tow mirror.
The telescoping feature (if equipped) allows the mirror to extend
approximately 76 mm (3 inches). This feature is especially useful to the
driver when towing a trailer.
Driver Controls
56