Set of 4 iridium spark plugs NGK 97566 SILZKFR8F7S for Mercedes-Benz A/C/E/S-Class AMG M274 M270

Set of 4 Iridium Spark Plugs NGK 97566 SILZKFR8F7S for Mercedes-Benz A/C/E/S-Class AMG M274 M270

Maximum Ignition System Performance

This set of four NGK 97566 iridium spark plugs (part number SILZKFR8F7S) is designed to ensure the flawless operation of modern Mercedes-Benz power units. The primary advantage of this set is the use of precious iridium on the center electrode and a platinum chip on the ground electrode. This material combination allows for an ultra-fine tip that requires less voltage to generate a powerful spark. This is critical for engines with high compression ratios and turbocharging, where standard spark plugs might perform inconsistently.

Operational Stability in Extreme Conditions

The Laser Iridium series spark plugs are distinguished by their high wear resistance. The iridium alloy has one of the highest melting points among metals, which virtually eliminates electrode erosion during operation. Thanks to this, the spark gap remains unchanged throughout the entire service life, ensuring uniform combustion of the air-fuel mixture. This prevents misfires, reduces engine vibration levels, and contributes to fuel economy. A specialized ceramic insulator coating eliminates current leakage, while the integrated resistor effectively suppresses radio interference, protecting the vehicle's electronic control systems.

Durability and Engine Protection

The spark plug construction includes a copper core that effectively dissipates heat from the working zone, preventing overheating and the occurrence of detonation (pre-ignition). The metal body features a specialized anti-corrosive coating applied via galvanic nickel plating, guaranteeing easy removal of the spark plugs even after high mileage. The extended threaded portion and the 12-point Bi-Hex nut profile ensure a precise and secure fit within the spark plug wells of M270 and M274 series engines.

Compatibility Table by Vehicle Models

These spark plugs are full functional equivalents of original Mercedes-Benz parts (OEM: A0041598103, A0001590500) and are intended for installation in the following models:

Technical Specifications

• Brand: NGK

• Brand Registration Country: Japan

• Material: Iridium, platinum, nickel-plated steel, heat-resistant ceramic, copper

• Size: Thread diameter 12 mm, thread length 26.5 mm, thread pitch 1.25 mm, 14 mm Bi-Hex wrench size

• Color: Metallic, white

• Weight: 192 grams (weight for a set of 4 pcs.)

• Gender: Unisex

• Condition: New

• Product Group: Ignition system components

• Purpose: Providing spark ignition in petrol engine cylinders

• Compatibility: Mercedes-Benz vehicles with M270 and M274 engines (OEM A0041598103, A0001590500, 0041598103, 0001590500)

• Features: High Ignitability technology, laser-welded electrodes, integrated 5 kOhm resistor, radio interference protection

• Center Electrode Type: Ultra-fine iridium tip

• Ground Electrode Type: Platinum chip

• Spark Gap: 0.7 mm

• Heat Range: 8

• Seat Type: Flat gasket

• Service Life: Up to 100,000 km mileage (depending on fuel quality)

• Package Included: 4 spark plugs in individual boxes, overall cardboard package

• Barcode (UPC): 087295875667