Basically, this is the mechanism that actually makes your window go up and down when you use the switch. It's a system of cables, gears, and sometimes a motor, all working together. Older cars might have a hand crank connected to it, but most modern vehicles use an electric motor driven by that switch on your door. It takes the electrical signal and turns it into the physical movement of raising and lowering the glass. It’s pretty straightforward – it’s what lets you control the window. The regulator is mounted inside the door and it physically supports the window glass while allowing it to move smoothly. It's connected to the window glass itself, usually with clips or fasteners, and linked to the window switch through the wiring. It’s a core part of your door’s operation. Well, if this goes bad, your window won't go up or down, or it might get stuck. You’ll notice if it starts to feel really slow, or makes grinding noises when you're using it. A failing regulator can also cause the window to fall down into the door – that’s obviously a big problem. It acts like a shield against the elements, so when it fails, you lose that protection. Replacing it keeps you comfortable and keeps the weather outside where it belongs. You can find a good selection of these at places like Fixparts Online, but we can definitely help you find the right one for your vehicle and get you back up and running. All-season performance: Window Regulator (MPN A4427200146) comes with a 12-month warranty!

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• 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. Performance you can rely on – Mercedes-Benz Trucks parts from FixParts Online.