Mercedes W169 W245 CDI Air Charger Turbo Intercooler Pipe Hose A6400900929

Mercedes W169 W245 CDI Air Charger Turbo Intercooler Pipe Hose is an original turbocharging system component designed for A-Class and B-Class models with diesel engines. As part of the Lines, hoses and pipes group, it is responsible for the stable routing of compressed air between the turbocharger and the intercooler, which directly affects the performance of the CDI unit. Using an OEM component allows you to maintain factory airflow characteristics and proper engine operating parameters.

Specifications and technical data

• SKU: A6400900929-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400900929
• Substitutable numbers: A6400900929, A 640 090 09 29
• Category: Hoses, Lines & Pipes

Purpose and function in the turbocharging system

The intercooler pipe hose in Mercedes W169 and W245 CDI models is responsible for the airtight and efficient delivery of compressed air to the charge air cooler. A properly selected component limits pressure drops, supports uniform cylinder filling, and helps maintain stable performance across the entire rev range. By maintaining the factory cross-sectional geometry and routing of the hose, the intake system operates predictably, which is essential for both the engine control unit and the durability of the turbocharger. Proper airflow translates into better throttle response, correct operation of the CDI injection system, and a reduced risk of charge air overheating.

Benefits of using an original intercooler hose

Using an original hose in the turbocharging system ensures:

• factory fitment to the ports and mounts in the engine bay,
• appropriate rigidity and flexibility in areas exposed to vibration,
• maintenance of the correct airflow direction without unnecessary turbulence,
• compatibility with CDI engine accessories within a given power range. By choosing this component, you reduce the risk of leaks, power loss, and boost pressure-related errors. This is particularly important in modern diesel units, where the engine controller precisely monitors the operating parameters of the turbocharger and intercooler.

Component condition and service application

The offered hose comes from disassembly and is classified as a used original component. This type of part works well in service repairs where the priority is to maintain the factory design of the intake system while optimizing costs. A used intercooler hose can be a reasonable choice in case of:

• mechanical damage to the existing hose (cracks, abrasions, deformations),
• detected leaks in the turbocharging system,
• the need for a quick replacement while maintaining the original specification. Thanks to the factory design, installation is simple and does not require modifications to other components in the engine bay.

Application in workshop practice

The Mercedes W169 W245 CDI Air Charger Turbo Intercooler Pipe Hose is often replaced when symptoms such as power loss, smoke under load, or a characteristic hissing sound near the intercooler occur. Replacing it with a functional component restores correct boost pressure and stabilizes the engine's operation. For workshops specializing in the Mercedes brand, this is a practical solution that allows for consistency with the factory intake system design.

Related Mercedes intake system components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as flexible intake sections, rigid pipe sections, or additional hose branches, check out the available parts in the Mercedes lines, hoses and pipes category. For drivers interested in a broader perspective on upgrading and replacing components in turbocharged cars, an article describing design changes and part selection in a popular sports model may be helpful – you can find more information in the material Hot-hatch legend: the evolution of the VW Golf GTI from Mk1 to Mk8.