Mercedes W169 W245 M266 Ignition Spark Plug Coil Cable Lead Petrol A2661501018

Mercedes W169 W245 M266 Ignition Spark Plug Coil Cable Lead is a high-voltage system component designed for petrol engines, ensuring stable transmission of the ignition pulse from the coil to the spark plugs. Thanks to its precise fit for the M266 unit, the cable operates in accordance with the factory parameters of the ignition system, supporting smooth engine performance and proper load response. This is a practical solution for users and workshops looking for a proven component for servicing the ignition system in A-Class and B-Class models.

Specifications and technical data

• SKU: A2661501018
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661501018
• Substitutable numbers: A2661501018, A 266 150 10 18
• Fuel type: Petrol
• Category: Ignition Coils

Purpose and role in the ignition system

The ignition cable in a petrol engine is responsible for the safe and controlled transmission of high voltage from the coil to the spark plug. In M266 units used in Mercedes A-Class (W169) and B-Class (W245), a correctly selected cable is crucial for:

• maintaining a stable spark across the entire RPM range,
• reducing misfires and jerking during acceleration,
• preserving proper engine idle quality,
• maintaining correct air-fuel mixture combustion.

A good condition of the ignition cable translates into more predictable engine performance, which is particularly important in daily urban and suburban driving.

Compatibility with the M266 engine

The presented cable has been designed to work with the M266 engine powered by petrol. This means it is matched in terms of:

• the geometry of the cable routing in the engine bay,
• the type and shape of the connectors on the coil and spark plug sides,
• insulation resistance to typical temperatures and operating conditions of the M266 unit.

Such a fit facilitates installation and minimizes the risk of mechanical stress on the cable, which could lead to micro-cracks in the insulation or connector leaks.

Operational characteristics

As an element from the Ignition coils group, the cable works directly with the high-voltage system, which is why its design is focused on:

• adequate electrical insulation to limit grounding faults,
• a stable connection with the coil and spark plug sockets,
• resistance to vibrations and temperature changes in the engine bay.

In practice, this translates into more repeatable mixture ignition, which helps maintain engine performance parameters at a level close to factory specifications. For workshops, this means predictable component behavior after installation and fewer service returns related to the ignition system.

Application in service and diagnostics

Replacing the ignition cable is often one of the first steps when diagnosing problems such as misfires, uneven idling, or temporary power drops. Using a cable dedicated to a specific unit and vehicle platform facilitates:

• eliminating interference in the high-voltage circuit,
• verifying the correct operation of the coil and spark plugs after replacement,
• maintaining compliance with the factory ignition system configuration.

For the end user, this means more predictable repair results and the possibility of further engine diagnostics without interference resulting from incorrectly selected components.

Product condition and benefits of choosing a used part

The offered cable comes from the used parts segment, which allows for economical vehicle maintenance while retaining a component consistent with the factory specification. For many workshops and users, this is a reasonable compromise between repair costs and maintaining the original operating characteristics of the ignition system. In case of doubts regarding the selection of the element for a specific engine version, it is worth using the OEM number or interchangeable numbers visible in the technical specification.

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 high-voltage cables, ignition modules, or complete coil assemblies, check the available parts in the Mercedes Ignition coils category.

For users who want to consciously approach the purchase of components from the secondary market, a practical guide describing seller verification, the importance of OEM numbers, and selecting parts by vehicle parameters may be helpful – you can find it in the article Safe purchase of used car parts online – a step-by-step guide.