This comprehensive electrical wiring manual provides detailed information for the Mercedes-Benz Vito Viano Van 639 model years 2003-2014. It offers a wealth of technical information, illustrated diagrams, and step-by-step instructions for diagnosing and repairing electrical issues. This manual is designed for both experienced mechanics and DIY enthusiasts who need a reliable source of information to understand and troubleshoot the vehicle's electrical system.

The manual covers a wide range of electrical components and systems, including:

* **Wiring Diagrams:** The manual includes clear and detailed wiring diagrams for the entire electrical system, making it easy to trace circuits and identify components.
* **Ground Points and Plug Connectors:** Discover the location and assignment of ground points and plug connectors, crucial for troubleshooting electrical issues.
* **Battery, Starting, and Charging:** Learn about the vehicle's battery system, starting procedures, and charging circuits.
* **Fuses and Relays:** This section provides detailed information about the fuse and relay board, including location, assignment, and replacement procedures.
* **Signal Acquisition and Actuation Module (SAM):** Understand the role of the SAM in the electrical system and how to troubleshoot issues related to this module.
* **Exterior Lights:** The manual covers all exterior lighting systems, providing detailed information for diagnosing and repairing issues.
* **Central Locking:** Learn about the central locking system, including its operation, components, and troubleshooting procedures.
* **CAN Bus:** This section explains the CAN bus system, a critical component of modern vehicles, and its role in communication between various electrical modules.
* **Instrument Cluster (IC):** The manual covers the instrument cluster, including its functions, diagnostics, and repair procedures.
* **Electronic Ignition Switch (EIS):** This section provides detailed information about the EIS, a key component of the ignition system, and how to troubleshoot issues.
* **Electronic Stability Control (ESP):** Understand the ESP system, its operation, and troubleshooting procedures for maintaining vehicle stability.
* **Common Rail Diesel Injection (CDI):** This section covers the CDI system, including its components, operation, and diagnostics.
* **Standard Heater:** Find information about the vehicle's standard heater system, including its operation, troubleshooting, and repair procedures.

This manual is a valuable resource for anyone working on the electrical system of a Mercedes-Benz Vito Viano Van 639. With its detailed information and clear illustrations, it can help you save time and money when diagnosing and repairing electrical issues.

The Mercedes-Benz Vito and Viano, both part of the W639 model series, represent a versatile and popular line of vans produced by the German automaker from 2003 to 2014. The Vito was primarily targeted towards commercial applications, while the Viano catered to the passenger transport market. Both models share a common platform, offering a robust construction, efficient engines, and a wide range of body configurations, including various wheelbases and cargo capacities. These vans were available with a selection of powerful and fuel-efficient diesel engines, ranging from 2.2 to 3.0 liters in displacement. They offered comfortable seating for up to nine passengers in the Viano, while the Vito could haul substantial payloads in its spacious cargo compartment. The W639 model series incorporated several modern features, such as electronic stability control (ESP), anti-lock braking system (ABS), and power steering, enhancing safety and maneuverability.

The 2003-2014 Mercedes-Benz Vito and Viano vans proved to be reliable workhorses and comfortable people movers, attracting a broad customer base. Their durability and versatility made them a popular choice for businesses, families, and individuals seeking a spacious and capable vehicle. The Wiring Manual for the W639 model series is an essential resource for technicians, mechanics, and DIY enthusiasts seeking to understand the intricacies of the vehicle's electrical system. This manual provides comprehensive information on the electrical components, wiring diagrams, troubleshooting procedures, and repair instructions, empowering users to diagnose and resolve electrical issues effectively. Understanding the electrical system is crucial for maintaining the vehicle's functionality and ensuring safe and reliable operation. The detailed diagrams and clear explanations within the Wiring Manual provide valuable insights into the complex electrical architecture of the Mercedes-Benz Vito and Viano vans.