Rear Power Outlet: Removal

Disconnect and isolate the battery negative cable.
Open the liftgate and remove the left rear cup holder assembly from the D-pillar trim. This will allow you to access the back side of the rear power outlet.
Look inside the power outlet receptacle base and note the position of the rectangular retaining bosses that secures the receptacle base to the D-pillar trim (Fig 1 ).

Fig 1: Identifying Cigar Lighter And Power Outlet Components
Courtesy of DAIMLERCHRYSLER CORP.
Insert a pair of external snap ring pliers into the power outlet receptacle base and engage the tips of the pliers with the retaining bosses of the mount.
Squeeze the pliers to disengage the mount retaining bosses from the receptacle base and, using a gentle rocking motion, pull the pliers and the receptacle base out of the mount. It may also help to reach through to the back side of the power outlet and apply some force to help work the base out.
Remove the power outlet mount from the D-pillar trim.