There are a ton of different lighting components present on the outside of your Mercedes and interior as well. All of the lighting components are important to maintain on your vehicle, as they all serve different functions. The side marker lights are something to maintain and pay attention to. They are located on both the front and rear of your vehicle on the sides. These serve as safety lights that are able to be seen by others on the road when you turn on your headlights. They provide extra illumination for when there is poor visibility or if you're driving at night. They became a requirement on vehicles in the United States starting in 1968. Over time, the side market lights might need to be replaced. Lights are going to wear out over time and the bulbs might eventually burn out or dim. The lights can also become damaged in an accident. Find OEM Mercedes side marker lights here on our site if you need new ones.