Opening The Trunk Lid/Tailgate

The tailgate/trunk lid can be opened in three ways: 

• via the switch on the tailgate/trunk lid if the vehicle is unlocked
• keyless
• via a switch in the center console under the mug holder (only C70).

Lock motor for tailgate/trunk is directly connected to Central electronic module (CEM). The switch on tailgate/trunk is directly connected both to Keyless vehicle module (KVM) and Central electronic module (CEM).

When the switch is pressed in, the keyless vehicle module (KVM) activates the antenna in the bumper and begins checking for an authorized key using keyless functionality. If an authorized key is found, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) to activate the lock motor in the trunk lid or tailgate. The tailgate/trunk lid is not opened if valet locking is activated.

There is no "unlocked" position for the lock motor for the tailgate/trunk lid. When the motor is activated, it releases the catch in the body and the tailgate/trunk lid can be opened. The tailgate/trunk lid locks when it is closed again. When the tailgate/trunk lid is to be opened, the lock motor is powered for approximately 0.5 seconds or until the central electronic module (CEM) receives a signal from the door open sensor in the lock motor indicating that it is open. If the trunk lid/tailgate is not indicated as open during this time, a diagnostic trouble code (DTC) is stored in the central electronic module (CEM).

The tailgate/trunk lid can be opened by activating the button on the remote control even if the rest of the vehicle is locked.