Mercedes-Benz A B Class W169 W245 48V Starter Alternator Generator A2661500101

Mercedes-Benz A B Class W169 W245 48V Starter Alternator Generator is a specialized electrical system component that combines the functions of a starter and an energy generator into a single unit. Designed for Mercedes vehicles equipped with a 48V system, this solution ensures stable power supply for electrical consumers and efficient engine starting. Thanks to its starter-generator design, it serves as a key component of the modern powertrain.

Specifications and technical data

• SKU: A2661500101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661500101
• Substitutable numbers: A2661500101, A 266 150 01 01, BG
• Category: Alternators & Generators

Purpose and function in the vehicle

The presented starter-generator is designed to work with powertrains in Mercedes-Benz A-Class W169 and B-Class W245 models equipped with a 48V system. It combines the function of a starter responsible for engine ignition and an alternator, which converts mechanical energy into electrical energy while the engine is running.

This integrated solution allows for:

• efficient charging of the 48V battery and powering of electrical consumers,
• cooperation with systems that improve driving comfort and dynamics,
• reduction of mechanical loads due to the compact design of a single component.

48V alternator and generator design

The 48V starter-generator belongs to the Alternators and generators category, meaning it acts as an advanced source of electrical energy in the vehicle. Compared to classic 12V alternators, the 48V system enables the operation of more demanding systems, such as extensive comfort features or powertrain support solutions.

The main advantages of the design include:

• increased energy efficiency compared to traditional 12V solutions,
• the ability to operate stably under high electrical loads,
• a compact combination of starter and alternator functions in one module.

Component condition and installation aspects

The offered starter-generator is used, which in practice means it has been dismantled from a vehicle and can be a cost-effective alternative to a new OEM component. Before installation, standard workshop verification is recommended, including checking electrical connections, the condition of connectors, and proper operation within the vehicle.

Due to its specific function in the powertrain, installation should be performed by an experienced service center that will ensure:

• proper seating in the powertrain and correct tension of the accessories,
• correct connection of the 48V system and control wiring,
• verification of charging parameters after starting the engine.

Benefits of using an original 48V starter-generator

Using an original solution designed for specific Mercedes models allows you to maintain the consistency of the electrical and powertrain systems. Factory matching for the 48V system minimizes the risk of compatibility issues, and the appropriate operating characteristics support stable charging and reliable starting.

Choosing a used component of this class is particularly beneficial when you want to:

• maintain the original vehicle configuration,
• ensure proper cooperation with onboard electronics,
• optimize repair costs while using OEM parts.

If you are planning a comprehensive repair or upgrade of the charging and starting system in your Mercedes and need other components from the same group, such as alternators, generators, or related starting modules, check the available parts in the Mercedes alternators and generators category.

Practical operating tips

After installing the 48V starter-generator, it is worth paying attention to regular checks of the electrical system, charging voltage, and battery condition. Stable 48V system operating parameters translate into reliable starting, proper functioning of comfort systems, and a lower risk of failure during operation.

If you are also considering refreshing the vehicle's appearance by changing wheels or refurbishing existing rims, a guide on alloy wheels may be helpful – you can find it in the article Used rims like new: a guide to buying and refurbishing alloy wheels, which will facilitate an informed decision when selecting and restoring rims.