Mercedes Vito W639 Roof Beacon Warning Flashing Emergency Light Set

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 Roof Beacon Warning Flashing Emergency Light Set is a specialized roof-mounted warning set designed for Mercedes Vito W639 generation commercial and special-purpose vehicles. The component belongs to the Automatic Level Control system and is designed to operate in the rear left section of the vehicle, providing clear light signaling in situations requiring increased visibility.

Specifications and technical data

• SKU: W639 Beacon Set
• Mark: Unbranded
• Condition: Used
• OEM Part Number: A6393280101
• Substitutable numbers: A6393280101, A 639 328 01 01
• Location on the vehicle: Rear, Left
• Category: Self-Levelling Suspension Parts

Purpose and function in the vehicle

The roof warning set for the Mercedes Vito W639 acts as an intense, flashing emergency light that increases vehicle visibility in traffic and while stationary in work zones. Its placement in the rear – left side area allows for effective notification of other road users regarding the presence of a service, emergency, or transport vehicle.

Integration with the Automatic Level Control system enables stable operation of the set under various vehicle load conditions, which is essential for operation in municipal, construction, or service fleets. As a result, the signaling remains clear and the beam angle predictable, regardless of the load configuration.

Set construction and key technical features

The presented roof warning set has been configured as a complete solution mounted in the rear left part of the body. The design is intended for compatibility with the factory electrical system of the Mercedes Vito W639, which facilitates integration with existing wiring harnesses and vehicle controls.

The most important technical features include:

• dedicated design for the roof of a van/special-purpose vehicle Mercedes Vito W639,
• intense, flashing warning light function for the rear zone,
• adapted for operation within the automatic body level control system,
• layout optimized for visibility from the rear and side of the vehicle.

Condition, fitment, and practical application

The item comes from the group of used components, making it an attractive cost-effective alternative while maintaining the functionality required in fleet and special-purpose vehicles. The use of original mounting geometry for the rear left body section facilitates fitting to the factory mounting points in the Mercedes Vito W639, without the need for structural modifications to the roof.

A set configured in this way will prove useful in vehicles used as:

• service and emergency vehicles,
• municipal and technical vehicles,
• special transport requiring increased visibility.

Benefits of installing the warning set

Installing the roof warning set in a Mercedes Vito W639 improves vehicle safety in traffic and in low-visibility zones. Clear light signaling allows other drivers to be alerted more quickly, which reduces the risk of collisions when parked on the roadside, in road work areas, or during breakdown assistance.

Cooperation with the Automatic Level Control system helps maintain the correct optical position of the set, which is particularly important during frequent changes in vehicle load. Thanks to this, the warning light remains clearly visible, and the vehicle maintains predictable behavior in traffic.

If you are planning a comprehensive repair or upgrade of the leveling and signaling zone in your Mercedes Vito W639 and need other elements from the same group, such as leveling sensors, control modules, or additional system components, check the available parts in the Automatic Level Control Unbranded category.

Installation and operational tips

Before installation, it is recommended to verify the compatibility of the set with the specific equipment version of the Mercedes Vito W639 and to check the electrical installation for correct power supply and control. Professional installation allows for maintaining the full functionality of the warning system and avoiding interference with other vehicle systems.

For users planning a broader vehicle modernization, including the drivetrain, practical tips on selecting components may be useful. In this context, it is worth reading the guide on transmissions, available in the article "Gearbox: manual, automatic, or DSG – common faults and a guide to buying a used transmission", which helps in consciously planning investments in used components.