Canon EOS 5D Instruction Manual page 195

Standard
exposure index
E x p o s u r e .
level mark
.............
~
Minus Plus
Set the Mode Dial to any shooting
mode except <0> (Full Auto) or
<M>.
Focus the subject and check the
display.
~\~(0
Turn the
<0>
dial to set the
exposure compensation amount
(up to ±2 stops in 1/3-stop
increments).
Select [0 AEB].
Turn the
<
0
>
dial to set the AEB
amount (up to ±2 stops in 1/3-stop
increments).
(g)
Minus
CD
Standard
@Plus
Focus the subject.
Press the
<*>
button.
Recompose and take the picture.