Ever taken a close look at the bottom of the door frames in your Mercedes-Benz vehicle? Not likely -- since, most of the time, you step over them getting in and out. If you have, though, you might've noticed some otherwise ordinary-looking crosspieces, made of everything from plastic or rubber to aluminum, stainless steel, or carbon fiber. They're door sills.

The simplest are just plates, decorative in nature. Some show off model names, if not trim levels, while others, like illuminated door sills, light up a sill area thanks to the tap-in power lines behind them. The latter can draw attention to a brand or logo, for instance, while providing better visibility for stepping. Each, however, has one important job or another.

Door kick plates or sill protectors, for example, can help prevent wear, not to mention keep sill areas clean. Door sill seals, for another example, can help prevent seepage, specifically of water and debris, into the cabin. Sill enhancements, though, such as molding, trim, and appliques, can make a sill more attractive.

When do you change a door sill, then? That depends on how visibly worn out it is, how damaged it is, or how broken. In the case of illuminated door sill plates, it depends on whether they're functioning intermittently or not at all -- namely, whether the lighting assembly, a switch, or a sensor is blown, if not the lights themselves. Luckily, if you've got a repair project or a replacement in the works, our auto parts store can help.

Upgrade the Door Frames in Your Car or SUV | Install Genuine Mercedes-Benz Door Sills

Your best options are made by your OEM, as they'll fit the model you love driving, guaranteed. We've got a wide variety for sale, in stock and ready to ship immediately. Browse our catalog by your model and model year and place your order online now. You'll be fixed up in no time.