The starter relay on a 2008 Dodge Charger is typically located in the Power Distribution Center (PDC), also known as the fuse box. This is usually found under the hood, but
it's crucial to consult your owner's manual. The manual will have a diagram showing the exact location and labeling of all relays and fuses in the PDC.
Don't rely solely on online information; the location might vary slightly depending on engine size and options. Using the owner's manual is the most reliable way to pinpoint it.