This bulb’s job is pretty straightforward—it creates the light that lets you see the road ahead and also makes your vehicle visible to other drivers. Modern ones do a lot more than just shine, though. They have specific beam patterns for high and low beams, and some even include daytime running light functionality. Different types—LED, halogen, xenon—each create light in a slightly different way and have different lifespans and brightness levels. It’s a core safety component, honestly. Think of it as your eyes on the road when it’s dark or visibility is low. It also acts like a shield, letting other drivers see you so they can react accordingly. It's tied into your electrical system, of course, but its main job is illumination. A headlamp assembly isn’t just the bulb, it’s the whole unit, but the bulb is the bit that actually makes the light. Well, driving with a burnt – out headlamp isn’t just a minor inconvenience, it’s a safety hazard and could get you a ticket. You’ll notice if one is out because the brightness will be significantly reduced on one side. More importantly, other drivers might not see you as easily, especially at night or in bad weather. It’s one of those things that’s easy to put off, but it’s worth getting sorted quickly. You can find a replacement fairly easily – we carry a lot of options, and Fixparts Online is a good place to check for what’s right for your vehicle. Replacing the bulb yourself is often pretty simple, but if you’re not comfortable doing it, any mechanic can do it quickly and affordably. Your trust matters: Headlamp (MPN B66830039) comes with a 12-month warranty!

Why Choose Mercedes-Benz Trucks?

• Keep your truck running its best with parts made specifically for it. That means a better fit and reliable performance. • Genuine Mercedes-Benz parts are built to last, helping you avoid costly repairs and downtime on the road. • We offer a wide range of parts, from routine maintenance items to complex engine components, all readily available. • Trust the quality and expertise of Mercedes-Benz – we stand behind every part we sell, ensuring peace of mind for you and your business. FixParts Online – Your Trusted Source for Quality Mercedes-Benz Trucks Auto Parts.