I am having trouble figuring our how to activate the automatic on/off headlamp function under the command system on my cl 500. I have been able to adjust the delay off features properly but under my version of the command system screens ('00 year car), the screens seem to skip the one in the manual that refers to the automatic functioning of the headlamps. How do I have the headlamps go on automatically with this system? Is it a function of leaving the headlamp switch in a certain position?