Dell W5300 Workgroup Laser Printer - Manual (Page 218)

Open the printer upper front door. 3.
Pull the envelope feeder up slightly and straight out of the printer. Set it aside. 4.
Close both front doors. 5.
Removing the printer from the duplex unit, removing a
duplex unit from a drawer and removing a drawer from
another drawer
NOTE: These same instructions work for removing the printer from the optional 250- or 500-sheet
drawer.
Ask someone to help you lift the printer by the handholds and set it aside. 1.
CAUTION: Make sure your fingers are not under the printer when you set it down.