Heater Mercedes Vito W636 W639 Electric Heater Booster PTC Matrix A6399007000

Heater Mercedes Vito W636 W639 Electric Heater Booster PTC Matrix is a specialized heating system component designed for rapid interior heating and cabin temperature stabilization. Thanks to PTC (Positive Temperature Coefficient) technology, the heater ensures controlled and safe heat output, which translates into comfort during low-temperature conditions. This solution is dedicated to Vito W636 and W639 generation models, allowing for an efficient replacement of a worn-out module.

Specifications and technical data

• SKU: A6399007000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6399007000
• Substitutable numbers: A6399007000, A 639 900 70 00
• Category: Other Air Conditioning & Heating

Technical characteristics of the PTC heater

The PTC Matrix electric heater in the Mercedes Vito air conditioning and ventilation system acts as an additional heat source that works in conjunction with the vehicle's air circulation. The PTC heating element automatically limits its power once a specific temperature is reached, which increases operational safety and reduces the risk of overheating. This solution is particularly beneficial in vehicles with diesel engines, where the warm-up time of a traditional water heater can be longer.

The module is structurally adapted to the factory Vito W636/W639 system, which facilitates installation in place of the original component. The properly designed geometry of the PTC matrix ensures uniform airflow through the heating section, and thus stable cabin heating parameters.

Purpose and application in Mercedes Vito

The presented electric heater is intended for the heating and ventilation system in the Mercedes Vito W636 and W639 series, where it works with the factory air conditioning controls. In practice, this means:

• efficient interior heating at low outside temperatures,
• support for the standard water heater during the engine warm-up phase,
• more uniform temperature distribution in the cabin, especially on short trips.

By maintaining the original design concept of the heating system, replacing the component with a functional module allows for restoring the proper operation of the system without the need for installation modifications.

Product condition and installation aspects

The offered heater comes from the secondary market, which allows for an economical restoration of the heating system's functionality while maintaining compatibility with the factory solution. Before installation, it is recommended to perform a standard verification of the vehicle's electrical system and the correctness of the airflow in the ventilation duct to fully utilize the potential of the PTC element.

Replacing the electric heater in a Vito W636/W639 requires access to the module inside the heater/air conditioning housing. From a service perspective, it is important to maintain the correct sequence of removing cover elements and to connect the connectors properly, which minimizes the risk of errors in the heating system's operation.

Benefits of using an original Mercedes solution

Using a PTC electric heater dedicated to the Mercedes Vito ensures:

• compatibility with the factory air conditioning and ventilation system controls,
• appropriate thermal parameters matched to the volume of the Vito cabin,
• preservation of the original heating operating characteristics, without interfering with the installation.

For the user, this means predictable system operation, faster window defrosting in winter conditions, and higher thermal comfort during daily vehicle use.

If you are planning a comprehensive repair or upgrade of the heating and ventilation zone in your Mercedes and need other elements from the same group, such as additional heating modules, air duct elements, or control components, check the available parts in the Other Mercedes category.

To select the right module for a specific version of the Vito even more precisely, it is worth verifying the manufacturer's markings and reference numbers – practical tips on how to safely buy components by number can be found in the guide on verifying part compatibility by OEM numbers. For a comparison of the characteristics of advanced drive and braking systems in higher-class cars, you can also refer to the article comparing Audi RS models with standard versions, which shows how important properly selected components are in vehicle operation.