NGK Spark Plug for Mercedes-Benz - ILFR6A

Vehicle Fitment & Part Details

This NGK spark plug (ILFR6A) is supplied as an OEM-grade replacement. Heat range 6. Thread M14 x 1,25. Verify VIN/engine before ordering.

Key Details

SKU

ILFR6A

Component

Spark Plug

Brand

NGK

Heat Range

6

Part MPN

3588

GTIN / Barcode

087295135884

Trade Numbers

ILFR6A

Product Specifications

Thread Size

M14 x 1,25

Thread Length [mm]

26,5

Spanner Size

16 mm

Spark Position [mm]

3,5

Electrode / Construction

Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 1 kOhm, with gasket seat, Fixed SAE connector

Brand Class

Premium

Vehicle Compatibility

Common fitments include Mercedes-Benz (C-CLASS, CLC-CLASS, CLK, CLS, E-CLASS, G-CLASS, S-CLASS, SL, +2 more). Always confirm the correct heat range and electrode design for your specific engine variant by VIN before ordering.

OEM Reference Numbers

Vehicle OE Numbers

• AMG: 004 159 45 03, A 004 159 13 03, A 004 159 45 03, 004 159 13 03
• Mazda: L3Y3 18 110, 0000 18 L3Y3, L3K9 18 110, L3K9 18 110A
• Mercedes-Benz: A 004 159 13 03, A 004 159 45 03, 0041591303, A 004 159 13 03 90, 0041594503
• Smart: 004 159 13 03, 004 159 45 03, A 004 159 13 03, A 004 159 45 03, STEYR, === ILTR6A-8G === [HAS IMAGE]\Spark Plug NGK 3787, MAZDA 6 Saloon (GG), 3 (BK), +20 more

Aftermarket Equivalents

• Beru By Driv: 14FR6MPU2, Z226, 0002340906
• Borgwarner (Beru): Z 226
• Bosch: F6MPP332, FR 6 MPP 332, 0 242 240 619, 0241240631, MAYBACH, A 004 159 45 03, 004 159 13 03, 004 159 45 03, +1 more

Fitment Notes

• Always match heat range, thread size and electrode design before ordering. Verify VIN/engine.

Installation / Use / Maintenance Tips

• Allow the engine to cool fully before removal - cylinder heads are easily damaged when warm.
• Use the correct deep-socket plug spanner (16 mm) and avoid impact tools.
• Inspect the existing plug for fouling, oil contamination, or worn electrodes - may indicate engine condition issues.
• Verify the gap if your supplied plug is not factory-set; consult your service manual for the correct value.
• Apply a small amount of anti-seize to the threads (sparingly) and torque to manufacturer specification.

Common Questions

Will this NGK spark plug fit my Mercedes-Benz?
This part (ILFR6A) is listed for the applications shown on this page. Always confirm the correct heat range, thread size and electrode design against your vehicle's service manual or a parts lookup before ordering. Verify VIN/engine.

What does the NGK part code mean?
The NGK trade number encodes physical and performance characteristics - thread/reach, electrode design, heat rating, and projection. Each digit and letter has meaning in NGK's naming convention. The heat range is usually the standalone digit (e.g. BPR6ES is heat range 6).

What is the difference between this NGK plug and a Bosch / Champion / Denso equivalent?
The cross-references listed under OEM Reference Numbers are functionally equivalent for the same applications, but materials, electrode design and heat dissipation can differ slightly. NGK is OEM-supply quality and most manufacturers specify NGK or Denso as their factory plug.

How do I confirm fitment if my engine variant isn't listed?
Match the supplied thread size, reach, electrode design and heat range against your existing plug. If unsure, request fitment assistance before ordering.