2008 Mercedes CL-Class Owner's Manual - Page 506

Controls in detail Trunk Valet locking Close the trunk ( page 501). Remove the mechanical key from the SmartKey ( page 684). Insert the mechanical key in the trunk lid lock. Turn the mechanical key clockwise to position 2 to lock the trunk. The trunk remains locked even when the vehicle is centrally unlocked. i To deny any unauthorized person access to the trunk, e.g. when you valet park the vehicle, lock it separately with the mechanical key. Leave only the SmartKey or SmartKey with KEYLESS-GO* less its mechanical key with the vehicle. i You can only cancel the separate trunk locking mode by means of the mechanical key. Insert the mechanical key in the trunk lid lock. Turn the mechanical key counterclockwise to neutral position 1 to unlock the trunk. You can now open the trunk ( page 500). 1 Neutral position 2 Locked 505