Mercedes W164 C219 Intake Air Throttle Body 320 CDI 642920 Diesel A6420900070

Mercedes W164 C219 Intake Air Throttle Body 320 CDI 642920 Diesel is an original intake system component designed for Mercedes diesel engines, ensuring precise airflow control. Thanks to its factory design, the throttle body works with the vehicle's electronics in a stable and predictable manner, which promotes smooth engine operation. This is a solution for users who expect consistency with the factory design and proper operation of the diesel fuel system.

Specifications and technical data

• SKU: A6420900070
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420900070
• Substitutable numbers: A6420900070, A 642 090 00 70, 0281002678, 0 281 002 678
• Fuel type: Diesel
• Part type: Throttle Body
• Category: Throttle Bodies

Technical characteristics of the intake air throttle body

The throttle body from this series operates in the diesel engine fuel system, where it is responsible for regulating the amount of air supplied to the intake manifold. In 320 CDI units, this component contributes to combustion control logic, influencing engine refinement, throttle response, and idle stability.

The design of the throttle body is adapted to the architecture of the 642 engine, which allows for proper cooperation with the factory engine control unit, sensors, and other intake system components. Using an original solution reduces the risk of diagnostic errors and adaptation problems.

Function in the diesel engine intake system

In modern diesel units, the air throttle body performs several important roles:

• it stabilizes airflow under various engine load ranges,
• it supports the operation of emission control systems,
• it influences the smoothness of transitions between loads and reduces vibrations,
• it enables precise mixture control in conjunction with engine electronics.

By maintaining the original geometry and operating characteristics, the intake system remains tuned according to the manufacturer's specifications, which is particularly important in premium class vehicles such as the Mercedes W164 or C219.

Application and vehicle selection

The described throttle body is intended for 320 CDI engines in W164 and C219 bodies, where it is mounted in the factory location within the intake system. When selecting the component, it is crucial to compare the markings with the existing part and verify compatibility with the specific engine version and vehicle model year.

The element should be treated as part of the engine control system, therefore installation in a workshop with access to diagnostics is recommended, which will allow for potential adaptation and verification of correct operation after replacement. A properly selected throttle body helps restore stable engine operation in the event of problems with fluctuating idle, power loss, or errors related to the intake system.

Condition, installation, and benefits of use

The product is offered as an item in the Throttle Bodies category, meaning it has been designed specifically to operate in the demanding thermal and mechanical conditions of the engine bay. A used component of this type allows for an economical repair while maintaining the original design specifications.

A properly installed throttle body can contribute to:

• more predictable engine response to load,
• reduction of problems with uneven idle,
• maintaining operating parameters consistent with the manufacturer's requirements,
• maintaining consistency with the factory engine control software.

Expanding the intake system in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional throttle bodies, airflow control elements, or components working with the intake system, check the available parts in the Mercedes Throttle Bodies category.

If you are simultaneously upgrading your car's interior and are interested in how to rationally combine used parts while maintaining a high standard of finish, the following guide may be helpful: Premium interior for half the price: second-hand seats, steering wheels, and multimedia.