Mercedes A B Class W169 W245 Diesel Turbocharger Screening Plate A6400900534

The MERCEDES W169 W245 Diesel Turbo Heat Shield is a specialized turbocharger and parts component designed to protect the turbocharger system in diesel engines. A properly selected heat shield stabilizes the turbocharger's operating conditions, supporting component durability and thermal safety in the engine compartment.

Specifications and technical data

• SKU: A6400900534
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400900534
• Substitutable numbers: A6400900534, A 640 090 05 34, BG
• Fuel type: Diesel
• Category: Turbos & Parts

Purpose and function of the turbo heat shield

The turbo heat shield in the Mercedes W169 and W245 diesel models is responsible for limiting heat radiation from the hot turbocharger section to adjacent components. This reduces thermal stress on the wiring, wiring harnesses, and plastic components, resulting in more stable operating conditions for the entire drivetrain.

Using a dedicated cover in your diesel supercharger system helps maintain:

• more predictable temperature around the turbocharger,
• better protection of components sensitive to overheating,
• consistency of the factory thermal architecture of the drive unit.

Diesel and turbocharger compatibility

This cover was designed for diesel engines where the turbocharger operates at elevated temperatures. Its design, tailored to the W169 and W245 platforms, allows for installation using the original mounting points, without requiring modifications to the exhaust system or engine accessories.

This fit ensures:

• proper heat conduction from the hot side of the turbo,
• maintaining the factory spacing between the cover and adjacent elements,
• consistency with the factory turbocharger system and associated parts.

Characteristics of the part used

The turbo heat shield offered in this variant is an aftermarket part and is considered a used original equipment part . These types of components are often chosen during turbocharger servicing when maintaining factory geometry, proper fit, and compatibility with the vehicle manufacturer's specifications are key.

Choosing a used thermal shield is a solution that allows you to:

• maintain the original design of the system within the turbocharger,
• optimize repair or modernization costs,
• maintain operating parameters close to factory ones.

Application in service, repairs and modifications

The Mercedes W169 and W245 turbo heat shield is suitable for both standard repairs and more extensive turbocharger work. It is especially useful when:

• the turbocharger is replaced and it is necessary to recreate the complete thermal environment,
• the old cover is deformed, corroded or no longer provides adequate thermal protection,
• It is planned to modify the exhaust system in the diesel engine while maintaining the factory thermal protection.

If you are also interested in other turbochargers and parts for Mercedes, check out our dedicated category: turbochargers and parts for Mercedes .

Why is it worth choosing the original turbo heat shield?

Compared to universal covers, an element dedicated to a specific vehicle platform provides:

• factory fit to the turbocharger and manifold geometry,
• predictable behavior in high temperature conditions typical of diesel engines,
• better integration with other covers and heat shields in the engine compartment.

If you're considering more extensive modifications to your supercharger system or looking for inspiration on how to consciously use aftermarket components, check out The Best Used Parts for Tuning Your Car , where we discuss a practical approach to tuning using proven, used components.