VGS-FDCT/4NAG2/NAG3 FBS4 Transmission Computer Genuine for Mercedes

The VGS-FDCT/4NAG2/NAG3 Transmission Computer is a premium remanufactured or brand-new replacement. Transmission Control Unit (TCU/TCM) specifically designed for Mercedes-Benz vehicles equipped with the advanced FBS4 security gateway. Addressing common failures such as harsh shifting, limp mode, or complete communication loss, this module serves as a direct-fit solution. It is fully compatible with Mercedes FBS4 encryption, ensuring secure and seamless integration with the vehicle’s immobilizer and central gateway system. Whether you are replacing a defective unit or performing a transmission swap, this computer guarantees the restoration of factory-level shifting performance and reliability.

⚙️ Function

• Gear Shift Management: Precisely controls solenoids and actuators for smooth, automated gear shifts based on speed, load, and driving conditions.
• Torque Converter Regulation: Manages the torque converter lock-up clutch to optimize fuel efficiency and reduce heat generation.
• Hydraulic Pressure Control: Adjusts transmission fluid pressure to prevent clutch slippage and ensure longevity of internal components.
• FBS4 Security Integration: Fully synchronized with the Mercedes FBS4 anti-theft architecture, preventing unauthorized vehicle operation.
• Diagnostic & Adaptation Support: Allows for fault code reading, live data streaming, and transmission adaptation resets via Mercedes XENTRY/DAS diagnostic systems.
• Limp Mode Prevention: Resolves electronic failures that force the vehicle into 2nd gear limp mode.

🚗 Supported Car Models

⚠️ Important Purchase Instructions & Product Details

📋 Product Specifications

🚀 Why Choose a Brand-New Unit?

• Extended Lifespan: Significantly outlasts used or refurbished alternatives, giving you peace of mind for years to come.
• Zero Hidden Defects: Delivers uncompromised, 100% OEM factory quality without the latent risks associated with salvaged parts.
• Superior Long-Term Reliability: All critical electronic components are completely fresh from the factory—avoid the temporary fixes and patched boards common in remanufactured units.

🛠️ Installation Guidelines

• Data Transfer: For optimal shifting performance, always transfer the adaptation data from your old unit to the new one.
• Adaptation Run: If the previous adaptation data is unavailable or unrecoverable, you must perform a complete highway adaptation run using the Xentry diagnostic system after installation.
• Professional Installation: We highly recommend that installation, coding, and programming be performed exclusively by a qualified Mercedes-Benz technician.