Mercedes W166 W204 W212 W221 W231 W463 Diesel OM642 Starter Motor A6429060800

Mercedes W166 W204 W212 W221 W231 W463 Diesel OM642 Starter Motor is an original starting system component designed for premium models such as the W166, W204, W212, W221, W231, and W463. Thanks to its factory design, it ensures proper cooperation with the OM642 power unit, stable starting in various operating conditions, and consistency with the vehicle's factory electrical system. This is a solution for users looking for a technically matched, used component with proven specifications.

Specifications and technical data

• SKU: A6429060800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6429060800
• Substitutable numbers: A6429060800, A 642 906 08 00
• Fuel type: Diesel
• Category: Starter Motors

Purpose and compatibility

The offered starter motor belongs to the Starter Motors category and has been designed to work with the OM642 diesel engine used in many Mercedes mid-size, luxury, and off-road models. The design is adapted to the starting characteristics of diesel units, which require higher torque during ignition, resulting in more reliable starting of both cold and warm engines.

The component is intended for Mercedes vehicles, which means it maintains the correct mounting geometry, proper engagement with the flywheel ring gear, and compatibility with factory wiring. As a result, installation is straightforward, without the need for system modifications or the use of adapters.

Construction and functional parameters

The Mercedes W166 W204 W212 W221 W231 W463 Diesel OM642 Starter Motor uses a classic, proven electromechanical design with a solenoid switch and a gear matched to the load of the diesel unit. This type of solution ensures:

• stable torque transmission to the crankshaft during starting,
• proper engagement with the flywheel ring gear,
• appropriate current characteristics for diesel engines,
• consistency with the factory starter control in Mercedes vehicles.

By being matched to a specific family of diesel engines, the starter supports repeatable and predictable starting of the power unit, which is important both in daily use and at higher mileages.

Application in OM642 diesel engines

OM642 diesel engines are known for their high torque and advanced design, which is why they require a starter with appropriately selected power and durability. The presented component was developed specifically with this unit in mind, which translates into:

• compatibility with the diesel engine's power supply and control system,
• maintenance of proper starting parameters at low temperatures,
• reduction of the risk of improper engagement or excessive wear of the flywheel ring gear.

For users who operate their Mercedes in diverse conditions, a properly selected diesel starter is an essential element of the entire powertrain's reliability.

Characteristics of the used component

The offered starter is a used item, which in practice means a favorable compromise between purchase cost and maintaining the manufacturer's original specifications. In the case of starters for diesel engines, choosing a second-hand part often allows for maintaining factory fit and build quality while reducing expenses on repairing the starting system.

Before installation, it is recommended to perform a standard verification of the vehicle's electrical system (condition of power cables, ground, and battery) to fully utilize the capabilities of the offered starter and avoid problems resulting from other system components.

Starting system expansion and related parts

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other items from the same group, such as additional starter motors, mounting elements, or installation accessories, check out the available parts in the Mercedes Starter Motors category.

If you want to better assess when choosing a used starter is justified and when it is worth considering other solutions, our guide article may be helpful: Renovation and repair of German cars – which used parts are worth buying and which are better to avoid?.