Mercedes W203 CL203 W204 M272 Petrol Ignition Coil Cable Connector A0001502780

Mercedes W203 CL203 W204 M272 Petrol Ignition Coil Cable Connector is a specialized component from the Cables, harnesses and connectors group, designed for the ignition system of petrol engines. It enables a secure, stable electrical connection between the ignition coil and the wiring harness, which translates into proper ignition operation and smooth engine performance.

Specifications and technical data

• SKU: A0001502780-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0001502780
• Substitutable numbers: A0001502780, A 000 150 27 80
• Fuel type: Petrol
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the ignition system

The presented connector is a component dedicated to the M272 series petrol engines used in Mercedes C-Class models of the W203, CL203, and W204 generations. Its task is to ensure proper electrical contact between the ignition coil and the wiring harness, which has a direct impact on:

• stable generation of ignition spark in every cylinder,
• correct control of coil operation by the engine control unit,
• reduction of ignition misfires and engine stuttering under load.

Thanks to a properly selected connector, you can reduce the risk of starting problems, jerking during acceleration, and errors stored in the engine control unit memory.

Connector construction and installation fit

The connector is designed as an installation element from the Cables, harnesses and connectors group, with a properly shaped housing and pin guidance. The construction ensures:

• mechanical guidance of the connector, which facilitates correct insertion onto the coil,
• protection against accidental disconnection during engine operation,
• proper arrangement of wires in the harness, minimizing stress and the risk of damage.

Such a solution allows for maintaining the factory harness routing and facilitates service, especially when replacing coils or performing diagnostic work in the engine compartment.

Benefits of using the original connector

Using a dedicated ignition coil connector in a petrol engine brings a number of practical operational benefits:

• Compatibility with the installation – matching the factory harness and coils used in a given engine type.
• Connection stability – reducing the risk of circuit breaks, which can cause uneven engine operation.
• Easier diagnostics – a secure connector allows you to focus on actual ignition system faults, without false symptoms resulting from loose contacts.
• Safe operation in the engine compartment – the connector design is intended for operation in elevated temperatures and in an environment of vibrations.

For users and service centers, this means fewer returns with the same fault and more predictable engine behavior under various load conditions.

Condition, assembly, and service application

The item comes from disassembly and is intended for reassembly in Mercedes vehicles with petrol engines that use ignition coils controlled via dedicated connectors. In practice, the connector will work well both for point repair of a damaged section of the harness and for broader service work within the ignition system, when it is necessary to replace individual connectors instead of the entire harness.

Before assembly, it is recommended to check the condition of the contacts and properly prepare the wires in the harness so that the connection is mechanically stable and electrically secure. Properly performed assembly allows for restoring the factory parameters of the ignition system without the need for costly replacement of the entire installation.

Support in selection and related components

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 connectors, harness fragments, or installation cables, check the available parts in the Mercedes cables, harnesses and connectors category.

For users of petrol engines who want to better understand the relationships between fuel supply and ignition operation and correctly diagnose fault symptoms, the guide article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, describing the principles of operation and good service practices in modern power units, may be helpful.