Why is one headlight of a Mercedes not working while the other is?
2 Answers
Mercedes headlight one bright one not bright the most common reason is that the bulb is burned out. Because if the fuse is burned out, then both headlights will not light up. It is recommended to go to a repair facility for inspection and handling. Bulb burned out: After removing the headlight, check if the bulb is burned out. If the filament turns black, it means the bulb is burned out, and a new bulb can be replaced. Alternatively, you can swap the two headlights to confirm. Introduction to Mercedes headlight models: The headlights of Mercedes brand cars are usually H11, and some models use xenon headlights and LED lights. For specific replacement, please refer to the user manual.
Last time my Mercedes also had the issue of one headlight being on and the other not, and it took me a while to figure out the cause. The most common reason is a burnt-out bulb, especially after long night drives. You can start by checking the headlight assembly under the hood: unplug the connector to see if the bulb surface is blackened or broken. Replacing a Mercedes headlight bulb isn’t difficult, but you must use the correct model. Another possibility is a blown fuse—locate the corresponding marked position in the car’s fuse box and replace it with a new one. If these issues are ruled out, then it might be a wiring or control module problem. Mercedes’ electronic systems are delicate; rainwater seepage or a loose connector can interrupt the current. That day, after all the hassle, I realized the connector wasn’t plugged in tightly. Since then, I’ve regularly checked during car washes to prevent it. Don’t delay—driving with one light out at night reduces visibility and increases accident risks. Safety first!
