Mercedes-Benz W/S211 (E-Class) & W219 (CLS)
3D-Printed Welcome Door Light Bracket with Custom Electronic PCB
Having trouble finding a compatible shadow light (also known as door light or welcome light) for the Mercedes-Benz W/S211 (E-Class) or W219 (CLS)?
You’re not alone—there’s virtually nothing available online or in stores.
But here’s the good news: it’s entirely possible to 3D print and assemble your own custom shadow light bracket, designed to fit plug-and-play into the existing festoon (Soffitten) bulb socket—no modifications needed.
Required Components for the Custom Shadow Light
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- Ball head screws (Tamiya Ball Connector 5mm, SP-592)
- 0.055 mm² wires in various colors
- CAN bus-compatible LED driver module
- LED projector with your desired logo
- V2A micro countersunk screws (1.2 × 6 mm)
- Soldering iron and a bit of skilled craftsmanship
🔧 The STL files for 3D printing the bracket are available for download on Thingiverse.
Initial Situation
The following festoon bulb (Soffitte) and cover are factory-installed in the door bracket of the Mercedes-Benz W/S211 (E-Class) and W219 (CLS).
The 3D models
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- Bracket
- Lid
Assembled 3D Print with CAN Bus Module and LED Logo Projector
The Final Result
Electronic Module – Circuit Board (PCB)
This custom circuit board is built around a central PT4115 step-down LED driver, which regulates power using an inductor (coil). This design ensures that energy is efficiently managed and not dissipated as heat.
A Glass Passivated Bridge Rectifier (MB10F) is integrated to provide reverse polarity protection, allowing the Shadow Light to function correctly even if installed with reversed wiring.
Ressources
3D plan and construction: AutoDesk Fusion 360
3D printer: Anycubic Mega S
Filament: Form Futura TitanX ABS