Mercedes w124 w140 SL R129 Windscreen Wiper Linkage Bushing

This model is a custom-designed repair part for the unique single-arm windshield wiper mechanism found in the Mercedes-Benz W124.

During the restoration process of the wiper system, a common issue was identified: a worn or broken plastic bushing inside the linkage mechanism. This part is not easily available on the market, and even when found, it may not fit properly or meet the required tolerances.

To solve this problem, this component was reverse-engineered and redesigned from scratch based on precise measurements of the original system.

🔧 What is this part?
This is a replacement bushing designed to eliminate play and restore smooth operation in the W124 mono wiper linkage system.

⚙️ Why is it needed?

Original plastic part wears out over time
Causes looseness, noise, or irregular wiping motion
OEM replacement is hard to find or unavailable
This model provides a reliable alternative solution

Youtube Link:
https://youtu.be/Zo4qAIc3lwI

🧩 Features

Designed for tight tolerance fit
Eliminates unwanted play in the mechanism
Improves long-term durability
Optimized for FDM 3D printing

🖨️ Print Recommendations

Material: PETG or ABS recommended (PLA not advised for long-term use)
Layer height: 0.2 mm
Infill: 80–100%
Orientation: Print in a way that maximizes strength along the load direction
Supports: Not required (depending on orientation)

⚠️ Notes

This part was tested on a Mercedes-Benz W124 wiper mechanism
Minor sanding or adjustment may be required depending on printer tolerances
Ensure proper lubrication during installation

📦 Installation
Install the bushing into the linkage where the original worn plastic component was located. Make sure the fit is snug and apply appropriate grease before reassembly.

💡 Disclaimer
This is a custom solution and not an official OEM part. Use at your own discretion.

🎥 Full restoration video available on my channel
You can see the full process of disassembly, problem diagnosis, design, and installation in my video.

If this model helped you, feel free to like, share, and leave a comment.
Contributions and improvements are always welcome.