Dell Latitude E4200 Manuel D'installation page 8

3 Gently press the computer into the media base until it clicks into place.
NOTE:
Your computer should be turned off only when you dock your computer
for the first time.
4 Turn on the computer.
The operating system recognizes the media base.
Undocking Your Computer From the Media Base
1 Before you undock your computer, save and close any open files, and exit
any open programs.
2 Pull the release lever toward the front of the computer.
3 Lift the computer out of the media base.
6
Media Base