Mercedes W169 W245 M266 Ignition Spark Plug Coil Cable Lead Petrol A2661501118

Mercedes W169 W245 M266 Ignition Spark Plug Coil Cable Lead is an original ignition system component designed for petrol engines, ensuring stable high-voltage conduction between the coil and spark plugs. Thanks to the factory fitment for the M266 unit, the cable maintains proper electrical and geometric parameters, which translates into reliable mixture ignition and smooth engine operation. This used OEM component is a sensible choice for drivers looking for a proven solution at an attractive price.

Specifications and technical data

• SKU: A2661501118
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661501118
• Substitutable numbers: A2661501118, A 266 150 11 18
• Fuel type: Petrol
• Category: Ignition Coils

Purpose and function in the ignition system

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

• stable spark generation under all load conditions,
• limiting electrical arcing and interference in the installation,
• maintaining smooth operation of all cylinders,
• reducing the risk of misfires and power loss.

The appropriate resistance and shielding of the cable support the correct operation of the engine control unit and sensors, which is important for both the dynamics and the refinement of the powertrain.

Benefits of using an original ignition cable

Using a cable dedicated to a specific Mercedes engine brings measurable operational benefits. The original connector geometry and cable length facilitate installation and minimize mechanical stress in the wiring harness. In practice, this means:

• secure seating of the terminals on the coil and spark plug,
• reduced risk of contact looseness and ignition interruption,
• better protection against moisture and dirt in the engine compartment,
• maintenance of factory cable routing, which facilitates servicing.

For petrol engines, the repeatability of electrical parameters of the cable is particularly important, as it directly affects spark quality and mixture combustion.

Condition, verification, and practical application

The item comes from dismantling and is offered as a used ignition cable, which allows for reduced service costs while maintaining the manufacturer's original specifications. This type of part is particularly useful when diagnosing ignition problems, such as:

• misfires under load,
• rough idling,
• periodic jerking during acceleration,
• increased fuel consumption resulting from incomplete combustion.

Replacing the cable with an OEM component of known origin is often a faster and more predictable solution than experimenting with aftermarket replacements of inconsistent quality.

Integration with the Mercedes ignition system

The cable has been designed to work with the factory Mercedes ignition system, including original ignition coils and engine management. Thanks to this, the following are maintained:

• compliance with the controller's electrical parameters,
• proper insulation for operating voltages in a petrol engine,
• resistance to temperature and vibrations typical for the M266 unit,
• compatibility with factory wiring harness routing in the engine compartment.

Such a fit reduces the risk of unwanted interference in the vehicle's electronics and facilitates subsequent service activities.

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 individual coils, complete modules, or additional high-voltage cables, check the available parts in the Mercedes ignition coils category.

Additional technical and operational information

The cable is intended for engines powered by petrol, which is important when selecting components for vehicles where different engine variants are present. During installation, it is worth paying attention to:

• correct routing of the cable away from high-temperature components,
• thorough pressing of the terminals into the sockets until they audibly click,
• checking the condition of other ignition system components (spark plugs, coils, wiring),
• maintaining factory cable holders and guides.

This allows you to fully utilize the potential of the ignition system and reduce the risk of recurring spark-related faults.

If you are considering a choice between original used components and refurbishment, it is worth reading the practical arguments presented in the article Manual transmission failures – why an original used part is often a more sensible choice than refurbishment, which can largely be applied to other powertrain and ignition system components as well.