Mercedes W203 W639 Glow Plug Relay Control Unit Module A0005453516

The Mercedes W169 W245 OM640 Glow Plug Control Module A0005453516 is an original heating system component designed for the OM640 engine in the A-Class W169 and B-Class W245 models. This module is responsible for precise management of the glow plugs' operation, which translates to more reliable diesel engine starting and stable operation during the warm-up phase. A used OEM component is a sensible choice for drivers seeking a proven solution at an attractive price.

Specifications and technical data

• SKU: A6461538491
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461538491
• Substitutable numbers: A6461538491, A 646 153 84 91, A00054535168, A 000 545 35 16
• Category: Glow Plugs

Purpose and Function of the Glow Plug Control Module

The glow plug control module in the OM640 engine is responsible for controlling the duration and intensity of the glow, both before starting and for a short period after the engine is running. A properly functioning module:

• ensures stable cold starts,
• reduces smoke in the initial phase of engine operation,
• supports smooth engine operation at low temperatures,
• reduces the load on the electrical system by controlling the glow plug current.

In Mercedes A-Class W169 and B-Class W245 vehicles with the OM640 engine, this is a crucial element for comfortable daily use, especially in urban conditions and with frequent starts.

Benefits of Using an Original Mercedes Control Module

Using an original glow plug control module to replace a worn or damaged one allows you to maintain the performance parameters intended by the manufacturer. For the user, this means:

• compatibility with the factory electrical system without the need for modifications,
• proper cooperation with the engine control unit,
• retention of factory pre-heating and post-heating strategies,
• reduced risk of errors in the diagnostic system.

A used OEM part is a practical solution for those who want to restore the functionality of the glow plug system while maintaining the original engine operating characteristics.

Product Condition and Installation Aspects

The offered glow plug control module is a used item from the Glow Plugs category, allowing for an economical repair of the heating system. The module is designed for installation in place of the factory control module, maintaining the original mounting points and electrical connectors.

When replacing, it is recommended to:

• check the condition of the glow plugs and the power supply system,
• verify any error codes in the engine control module's memory,
• check the correctness of the ground connections.

This approach increases the chances of permanently resolving starting issues and reduces the risk of recurring faults.

Why Choose a Mercedes Glow Plug Control Module for OM640

In diesel engines, precise control of the glow plugs directly impacts the engine's smoothness and the vehicle's user comfort. By choosing a glow plug control module specifically designed for Mercedes W169 and W245 with the OM640 engine, you are investing in a solution engineered specifically for this powertrain, which translates to predictable vehicle behavior in all conditions.

If you are looking for other items from the Glow Plugs category for this brand, check out our offer on Mercedes glow plugs, where you will find matching components for various models.

More Technical Tips

The engine heating and starting system works in conjunction with other components, including the cooling system. High temperatures under the hood can affect the durability of electronic components, so it is also important to ensure the radiator and fans are in good working order. Practical tips can be found in our guide Summer Heat vs. Cooling System – Used Radiators and Fans as a Way to Save, which will help you better plan your car's maintenance.