Remove
Open the trunk.
Lift up the rear trunk floor, and then remove it from the vehicle.
Remove the trunk sill trim. See
Trim - Sill - Trunk (Remove and Replace).
Release the trunk seal
Flood Ports - 2nd Generation (Remove and Replace) - Remove
Remove
Connect a laptop with Toolbox 3 to the vehicle.
In Toolbox, click in the Search field, and then click Tools.
From the Tools menu, click Active Alerts.
Click Read Alerts and check for a BMS_a123, BMS_a151, or a BMS_a035
alert