Mercedes-Benz W203 M111 C 200 230 K Bosch Alternator Generator A0111547202

Mercedes-Benz W203 M111 C 200 230 K Bosch Alternator Generator is an original component from the Alternators and generators group, designed for the charging system in M111 engines used in C 200 and C 230 models. This solution allows you to restore the proper power supply to the electrical system, stabilizing the operation of all electrical consumers in your Mercedes.

Specifications and technical data

• SKU: A0111547202
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0111547202
• Substitutable numbers: A0111547202, A 011 154 72 02, 0124515046, BG
• Category: Alternators & Generators

Purpose and function in the electrical system

The presented alternator is dedicated to M111 units in the Mercedes C-Class W203 generation, where it is responsible for generating electrical energy while the engine is running. Its task is to power key vehicle systems – from engine control units and lighting to interior comfort equipment – and to charge the battery under various load conditions.

Thanks to its precise fit for the M111 engine specifications, the alternator maintains stable voltage in the system, which reduces the risk of power drops, starting issues, or improper electronic operation. This is particularly important in modern W203 units, where many vehicle functions rely on precise electronics.

Advantages of using an original Mercedes alternator

Using an original alternator in a Mercedes C-Class W203 provides a number of practical benefits:

• reliable fitment to the M111 engine mounts and accessories,
• proper cooperation with the factory voltage regulator and vehicle wiring,
• appropriate charging characteristics tailored to the loads in C 200 and C 230 models,
• reduced risk of interference in the operation of control units and comfort systems.

By choosing this component, you are opting for a solution consistent with the factory charging system design, which translates into more predictable operation and easier diagnostics of potential faults.

Condition, verification, and installation aspects

The alternator is offered in used condition, which allows for an economical repair of the charging system while maintaining the original design. Such components are frequently chosen for servicing older W203 units, where both cost and compliance with factory solutions are important.

Before installation, standard workshop procedures are recommended: checking the charging system, the condition of the drive belt, and ground connections. A properly installed alternator ensures stable operation of the electrical system and reduces the risk of recurring service interventions.

Part selection by numbers and integration with the vehicle system

The element has an assigned OEM part number and associated interchangeable numbers, which facilitates precise identification in service catalogs and part selection systems. This allows you to quickly verify the compatibility of the alternator with the specific version of the M111 engine in your Mercedes C-Class.

Proper selection by numbers minimizes the risk of installation problems, incorrect charging characteristics, or incompatibility with the electrical harness. This is especially important in vehicles where the charging system interacts with extensive safety and comfort systems.

Charging system expansion and technical knowledge

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 generators, alternators with different capacities, or compatible charging system components, check the available parts in the Mercedes alternators and generators category.

For users interested in a broader context of powertrain operation and electrical load in all-wheel-drive vehicles, an article discussing various AWD systems may be useful – xDrive, 4Matic, quattro, or 4Motion – a comparison of AWD drives from BMW, Mercedes, Audi, and VW. It allows for a better understanding of the relationships between powertrain load, electronics, and the requirements placed on components such as the alternator.