Mercedes-Benz W212 Tail Light Assembly A2129066701 - Used Original Parts

Mercedes-Benz W212 Tail Light Assembly A2129066701 - Used Original Parts

Diagnosis and Common Symptoms

On the W212 E-Class platform, particularly the facelift models, rear lighting failures are commonly associated with LED driver circuit degradation or moisture intrusion. The vehicle's Rear Signal Acquisition Module (SAM) monitors resistance values; a deviation typically triggers a specific "Check Tail Light" or "Brake Lamp" malfunction message on the instrument cluster. Physical symptoms include flickering LED bars, partial illumination where specific segments fail to light up, or visible condensation inside the lens housing which compromises the internal electronics.

Introduction

Restore the rear visibility and aesthetic lines of your E-Class with this Genuine Used Mercedes-Benz tail light assembly. Unlike aftermarket alternatives that often result in panel gaps or mismatched LED color temperatures, this original unit guarantees factory-correct fitment and light output. We have bench-tested this component to verify that all LED functions—brake, turn signal, and running lights—are operating at full intensity before listing.

Product Details

• Brand: Mercedes-Benz

• Model Compatibility: E-Class W212 (Facelift / Sedan)

• Part Name: Tail Light Assembly (Left/Outer)

• Part Number: A2129066701

• Condition: Genuine Used (Tested Working)

• Notes: Unit is LED type. Connectors have been inspected for thermal damage. Ensure your connector plug is free of corrosion prior to installation.