It's important to note that not all 2008 Dodge Avengers came with automatic headlights. It was likely an option that could be added to some trim levels. To know for sure if your specific Avenger has this feature, you should:
* Check your owner's manual: This will definitively state whether your vehicle is equipped with automatic headlights and how to operate them (if equipped).
* Look for a symbol on the headlight switch: There's usually a small sun or headlight symbol that indicates automatic headlight mode.
* Test it: Drive your car into a dark garage or tunnel. If the headlights turn on automatically, then your Avenger has this feature.
If you find the headlight switch, but it doesn't have an "Auto" setting, then your car doesn't have automatic headlights.