Mercedes W163 CL203 W203 Petrol Alternator Generator Valeo 120A A0111546402

Mercedes W163 CL203 W203 Petrol Alternator Generator Valeo 120A is an original component from the Alternators and generators group, designed for Mercedes petrol vehicles. It ensures a stable power supply for the electrical system and proper battery charging, which is crucial for the reliable operation of all onboard systems.

Specifications and technical data

• SKU: A0111546402
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0111546402
• Substitutable numbers: A0111546402, A 011 154 64 02
• Fuel type: Petrol
• Category: Alternators & Generators

Application and compatibility

The presented alternator is intended for selected Mercedes W163, CL203, and W203 models with petrol engines. The design based on Valeo solutions allows for installation in place of the factory component without the need for modifications to the system, which facilitates the mechanic's work and reduces vehicle downtime.

The alternator is designed to work with a 12 V system in passenger cars, providing sufficient power reserve for standard equipment and additional electrical consumers, such as window heating, multimedia systems, or lighting.

Operating parameters and technical characteristics

A current output of 120 A allows for stable power supply to electrical systems even under increased load, which is important in vehicles equipped with extensive electronics. The applied Valeo technology ensures good operating culture, appropriate charging characteristics, and proper cooperation with the vehicle's voltage regulator.

The alternator is adapted for operation in petrol-powered engines, which guarantees compatibility with the rotational characteristics of petrol engines and the requirements of their accessories. Properly selected drive ratios and the design of the rotor and stator ensure proper charging even at lower engine speeds.

Condition, origin, and benefits of choosing a used part

The offered alternator is a used part, sourced from the dismantling of a Mercedes vehicle. This type of component is a cost-effective solution while maintaining original build quality and mounting fitment. Choosing a used OEM alternator allows you to maintain the integrity of the electrical system and avoid problems typical of cheap, low-quality replacements.

By choosing an original alternator from dismantling, you gain:

• factory fitment to engine mounts and accessories,
• compliance with electrical system operating parameters,
• a reasonable compromise between repair cost and component durability.

Mercedes alternators and generators – expansion and modernization of the charging system

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as pulleys, tensioners, or additional power-generating units, check the available parts in the Mercedes alternators and generators category.

Practical installation and operational tips

When replacing the alternator, it is worth paying attention to the condition of the drive belt, guide rollers, and ground connections in the engine compartment. Proper installation, correct belt tension, and clean, well-tightened electrical connections have a direct impact on the alternator's durability and charging stability.

After installation, it is recommended to check the charging voltage at various engine speeds and with the main power consumers switched on. This allows for quick detection of any irregularities in the system's operation and helps avoid starting problems or voltage drops in the installation.

Substantive support and knowledge about parts from dismantling

If you want to better understand the principles of selecting used components and their impact on the safety and durability of repairs, it is worth reading the guide on post-accident repairs and the use of parts from dismantling: Bodywork and chassis – post-accident repairs using parts from dismantling. Although it mainly concerns the body, it presents universal principles for the reasonable selection of used parts, which can also be applied to mechanical and electrical components.