Genuine Mercedes-Benz Spark Plug – M176 / M177 / M178 / M260 / M264

Specification Overview
Genuine Mercedes-Benz spark plug with iridium-tipped center electrode and platinum ground electrode. Manufactured by Bosch (7434 / 96347) and NGK (SILZKFR8F7S / 97566), this is the factory-spec ignition component for Mercedes-Benz’s latest generation of high-performance petrol engines, including all 4.0L V8 biturbo and select 2.0L 4-cylinder turbo units.

• Type: Spark plug with iridium center electrode / platinum ground electrode

• Thread Size: M12 x 1.25

• Thread Length: 26.5 mm

• Hex Size: 14 mm

• Electrode Material: Iridium (center) / Platinum (ground)

• Center Electrode Core Material: Copper

• Ground Electrode Configuration: Square Platinum Electrode

• OE Numbers: 0001590500, 000-159-05-00, 000.159.05.00

• Cross References: NGK 97566, Bosch 7434 / 96347, SILZKFR8F7S

• Manufacturer: Bosch / NGK (OEM supply)

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Application & Engine Fitment

This spark plug is the factory-spec replacement for Mercedes-Benz’s most powerful and advanced petrol engines. It is used across the entire AMG V8 lineup and select high-performance 4-cylinder engines.

Primary Engine Applications:

⚠️ Important: This spark plug is for petrol engines only. Do not use on diesel engines.

Comprehensive Model Fitment:

⚠️ Important: M176, M177, and M178 engines require 8 spark plugs per vehicle (one per cylinder). M260, M264, and M282 engines require 4 spark plugs per vehicle.

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Service Life & Change Intervals (Technical Data)

The iridium-platinum combination provides exceptional durability and conductivity. However, under high-performance and severe conditions, replacement intervals must be adjusted.

Standard Recommended Interval:

• 40,000 miles (approx. 64,000 km) – Mercedes-Benz factory recommendation for M176/M177/M178

• 30,000 to 100,000 miles – General industry range depending on usage

Critical Adjustment for Kampala (Severe Operating Conditions):
The operational climate (ambient temperatures 20°C–40°C), high humidity, stop-and-go urban traffic, and variable fuel quality classify as “Severe Duty” per MB Work Instructions. Spark plugs in turbocharged direct-injection engines experience higher thermal stress and electrode wear under these conditions.

Recommended Replacement Interval under East African operating parameters:

• Maximum: 40,000 km or 3 years (whichever occurs first)

• Heavy urban use / frequent short trips: 30,000 km or 2 years

• AMG / high-performance models (C63, E63, GT, G63): 25,000 km recommended due to higher thermal stress

⚠️ Important: Spark plugs should be replaced as a complete set. Replacing only one or two plugs will cause uneven combustion and potential engine damage. For V8 engines, always purchase 8 plugs.

Failure Symptoms – When to Replace:

• Engine misfires or rough idling

• Check Engine Light illuminated (DTC codes P0300–P0304 indicate misfires)

• Hesitation or loss of power under acceleration

• Poor fuel economy

• Difficulty starting the engine

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Packaging & Pricing (Alps Autoz Kampala)

Often Replaced Together:
For a complete ignition service, replace the following simultaneously:

• Spark plugs (set of 4 or 8, as required)

• Ignition coils (if showing signs of failure)

• Engine air filter (per chassis application)

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Technical Notes for the Workshop

• Gap Setting: Pre-gapped at factory. Do not attempt to adjust the gap – iridium/platinum electrodes are fragile and can be damaged.

• Torque Specification: 25 Nm (refer to specific model service manual). Over-tightening can damage the cylinder head; under-tightening can cause heat transfer issues.

• Anti-Seize: Not required on genuine Mercedes-Benz spark plugs with factory-applied anti-seize coating.

• Genuine vs. Aftermarket: Genuine MB A0001590500 is manufactured by Bosch and NGK to OEM specifications. Equivalent aftermarket brands:

  • NGK SILZKFR8F7S (97566)

  • Bosch 7434 / 96347

• Storage: Shelf life of 5 years in unopened, sealed packaging. Store in a dry environment away from direct sunlight.

• Compatibility Note: This spark plug is not compatible with M271, M272, M273, M274, M276, OM651, OM642, or any diesel engines. Use only for M176, M177, M178, M260, M264, and M282 petrol applications.

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Alps Autoz – Kampala