2008 Mercedes CL-Class Owner's Manual - Page 504

Controls in detail Trunk Closing trunk and locking vehicle from outside (vehicles with KEYLESS-GO*) You can close the trunk and lock the vehicle simultaneously from the outside using the KEYLESS-GO locking/closing switch. Even with the SmartKey or SmartKey with KEYLESS-GO* removed from the starter switch or the SmartKey with KEYLESS-GO* removed from the vehicle, the remote trunk opening/closing switch can be operated. Therefore, do not leave children unattended in the vehicle, or with access to an unlocked vehicle. A child's unsupervised access to a vehicle could result in an accident and/or serious personal injury. Vehicles with KEYLESS-GO* 1 Trunk closing switch Press trunk closing switch 1 briefly. The trunk closes. 1 KEYLESS-GO locking/closing switch Make sure you have the SmartKey with KEYLESS-GO with you. Press switch 1 briefly. i If the trunk lid comes into contact with an object while closing (e.g. luggage that has been piled too high) in the upper motion sequence, the closing procedure is stopped and the trunk reopens slightly. Vehicles without KEYLESS-GO* i You can also close the trunk by hand. 1 Trunk closing switch 503