Mercedes W177 W247 Air Conditioning Heater Matrix Unit Heater Housing Box

Mercedes W177 W247 Air Conditioning Heater Matrix Unit Heater Housing Box is a factory-original heater box assembly designed for the cabin heating and cooling system in Mercedes compact models. This component serves as the central air distribution point in the vehicle, ensuring stable operation of both the heating and air conditioning systems. By maintaining the original OEM design, it is a particularly beneficial solution for professional repairs and precise restoration of the HVAC system interior.

Specifications and technical data

• SKU: rhd-A2478300500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2478300500
• Substitutable numbers: A2478300500, A 247 830 05 00
• Category: Other Air Conditioning & Heating

Purpose and function in the HVAC system

The presented Mercedes W177 W247 Air Conditioning Heater Matrix Unit Heater Housing Box is a complete housing unit in which the heater core and air conditioning components operate. It is where warm and cold air are mixed, the airflow is directed to the windshield, footwells, and vents, and it works in conjunction with control flaps and actuator motors (depending on the vehicle configuration). A correctly selected housing is crucial for repairs following collisions, interior flooding, or mechanical failures of the ventilation system.

Construction and fitment for Mercedes W177 / W247

The heater box construction has been designed specifically for the interior architecture of Mercedes compact class models, which translates into precise fitment with the dashboard, air ducts, and electrical wiring. Original mounting points and connection ports allow for installation in factory locations without the need for modifications, which is important for both independent service centers and workshops specializing in the Mercedes brand. Using the original housing reduces the risk of leaks, improper airflow, or issues with the installation of accompanying components.

Benefits of using the original heater housing

Choosing a factory-original heater box for the Mercedes W177 / W247 is important not only for mechanical fitment but also for the stability of the entire HVAC system. The most significant advantages include:

• preservation of factory air duct geometry, which promotes even airflow to all cabin zones,
• compatibility with original flaps, actuators, and sensors,
• easier diagnostics and future service due to compliance with manufacturer documentation,
• reduction of unwanted airflow noise resulting from the poor fitment of aftermarket replacements.

The used condition element allows for economical repair while maintaining a design consistent with the factory project, which is particularly important for more extensive work within the dashboard area.

Service application and installation

The Mercedes W177 W247 Air Conditioning Heater Matrix Unit Heater Housing Box is suitable both for replacing a damaged housing after a collision and for comprehensive interior restoration after interference with the HVAC installation. Due to the complexity of disassembly work, installation is recommended at a specialized workshop that has experience working with the dashboard and Mercedes air conditioning systems. Proper preparation of the component before installation (cleaning, leak testing, verification of mounting points) helps minimize vehicle downtime and reduces the risk of re-disassembly.

Integration with other Mercedes components

In the case of extensive repairs to the cabin heating and cooling system, it is worth considering a simultaneous inspection of other elements in this zone – air ducts, control panels, temperature sensors, or flap drive components. If you are planning a comprehensive repair or upgrade of the interior zone and air conditioning system in your Mercedes and need other elements from the same group, such as air ducts, ventilation grilles, or additional control modules, check the available parts in the Other Mercedes category.

Technical knowledge and vehicle project development

For those interested in comparing technical solutions used in different brands and model versions, including high-performance cars, material discussing differences in the construction of powertrains, brakes, and chassis may be useful. In this context, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how manufacturers differentiate components depending on the vehicle's purpose.