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Replacement Parts for Mercedes-Benz Spark Plug
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Mercedes-Benz Spark Plug

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Spark Plugs & Wires
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  • Denso Iridium Long-Life Spark Plug for Mercedes-Benz - 3457

    Denso® Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 3457
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 24
    • Hex Size: 9/16" (14 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 12 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511034570
    • Part Description: Mercedes-Benz Iridium Long-Life Spark Plug
    More Info
    $15.69
  • Denso Iridium Long-Life Spark Plug for Mercedes-Benz - 3442

    Denso® Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 3442
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 22
    • Hex Size: 9/16" (14 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 12 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511034426
    • Part Description: Mercedes-Benz Iridium Long-Life Spark Plug
    More Info
    $15.18
  • Denso Iridium Long-Life Spark Plug for Mercedes-Benz - 3495

    Denso® Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 3495
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 22
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 12 mm
    • Thread Pitch: 1.25 mm
    • Part Description: Mercedes-Benz Iridium Long-Life Spark Plug
    More Info
    $13.11
  • Denso Cold Type Iridium Long-Life Spark Plug for Mercedes-Benz - 3403

    Denso® Cold Type Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 3403
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .031" (0.8 mm)
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 0.8 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511034037
    • Part Description: Mercedes-Benz Cold Type Iridium Long-Life Spark Plug
    More Info
    $10.22
  • Denso Iridium Long-Life Spark Plug for Mercedes-Benz - 3433

    Denso® Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 3433
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511034334
    • Part Description: Mercedes-Benz Iridium Long-Life Spark Plug
    More Info
    $10.22
  • Denso Hot Type Iridium Long-Life Spark Plug for Mercedes-Benz - 3435

    Denso® Hot Type Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 3435
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .031" (0.8 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 0.8 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • Part Description: Mercedes-Benz Hot Type Iridium Long-Life Spark Plug
    More Info
    $10.26
  • Denso Iridium TT™ Spark Plug for Mercedes-Benz - 4704

    Denso® Iridium TT™ Spark Plug for Mercedes-Benz

    PartNumber: 4704
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Ground Electrode Quantity: 1
    • Ground Electrode Tip Design: Platinum Twin-Tip
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Material: Nickel
    • Nominal Gap: 1 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Spark Plug Reach: 26.50 mm
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047044
    • Wrench Diameter: 16 mm
    • Part Description: Mercedes-Benz Iridium TT™ Spark Plug
    More Info
    $7.50
  • Denso Iridium Long-Life Spark Plug for Mercedes-Benz - 3421

    Denso® Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 3421
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Ground Electrode Quantity: 1
    • Ground Electrode Tip Design: Platinum Chip
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Material: Nickel
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Spark Plug Reach: 16.50 mm
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511034211
    • Part Description: Mercedes-Benz Iridium Long-Life Spark Plug
    More Info
    $7.36
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5344

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5344
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Ground Electrode Quantity: 1
    • Ground Electrode Tip Design: Tapercut, U-Groove
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Material: Nickel
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Spark Plug Reach: 26.50 mm
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053441
    • Wrench Diameter: 16 mm
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $6.67
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5353

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5353
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .035" (0.9 mm)
    • Heat Range: 22
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 0.9 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 12 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053533
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $7.69
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5356

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5356
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .035" (0.9 mm)
    • Heat Range: 22
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 0.9 mm
    • Overall Height: ISO
    • Reach: 26.5 mm (1.04")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 12 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053564
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $7.72
  • Denso Iridium Long-Life Spark Plug for Mercedes-Benz - 5087

    Denso® Iridium Long-Life Spark Plug for Mercedes-Benz

    PartNumber: 5087
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • OE Part Number: ZT20EPR11
    • Overall Height: JIS
    • Reach: 18.00 mm
    • Seat Type: Tapered
    • Terminal Type: Solid
    • Thread Diameter: 14.00 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511050877
    • Wrench Diameter: 16 mm
    • Part Description: Mercedes-Benz Iridium Long-Life Spark Plug
    More Info
    $5.83
  • Denso Iridium TT™ Hot Type Spark Plug for Mercedes-Benz - 4701

    Denso® Iridium TT™ Hot Type Spark Plug for Mercedes-Benz

    PartNumber: 4701
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Resistance: 5000 Ohms
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047013
    • Part Description: Mercedes-Benz Iridium TT™ Hot Type Spark Plug
    More Info
    $6.67
  • Denso Iridium TT™ Cold Type Spark Plug for Mercedes-Benz - 4702

    Denso® Iridium TT™ Cold Type Spark Plug for Mercedes-Benz

    PartNumber: 4702
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Ground Electrode Quantity: 1
    • Ground Electrode Tip Design: Platinum Twin -Tip
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Material: Nickel
    • Nominal Gap: 1 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Resistance: 5000 Ohms
    • Seat Type: Gasket
    • Spark Plug Reach: 19 mm
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047020
    • Wrench Diameter: 16 mm
    • Part Description: Mercedes-Benz Iridium TT™ Cold Type Spark Plug
    More Info
    $6.67
  • Denso Iridium TT™ Spark Plug for Mercedes-Benz - 4706

    Denso® Iridium TT™ Spark Plug for Mercedes-Benz

    PartNumber: 4706
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047068
    • Part Description: Mercedes-Benz Iridium TT™ Spark Plug
    More Info
    $7.01
  • Denso Iridium TT™ Spark Plug for Mercedes-Benz - 4707

    Denso® Iridium TT™ Spark Plug for Mercedes-Benz

    PartNumber: 4707
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047075
    • Part Description: Mercedes-Benz Iridium TT™ Spark Plug
    More Info
    $7.03
  • Denso Iridium TT™ Spark Plug for Mercedes-Benz - 4708

    Denso® Iridium TT™ Spark Plug for Mercedes-Benz

    PartNumber: 4708
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Heat Range: 16
    • Hex Size: 13/16" (21 mm)
    • Nominal Gap: 1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047082
    • Part Description: Mercedes-Benz Iridium TT™ Spark Plug
    More Info
    $7.01
  • Denso Iridium TT™ Spark Plug for Mercedes-Benz - 4709

    Denso® Iridium TT™ Spark Plug for Mercedes-Benz

    PartNumber: 4709
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Heat Range: 20
    • Hex Size: 13/16" (21 mm)
    • Nominal Gap: 1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047099
    • Part Description: Mercedes-Benz Iridium TT™ Spark Plug
    More Info
    $7.03
  • Denso Iridium TT™ Spark Plug for Mercedes-Benz - 4713

    Denso® Iridium TT™ Spark Plug for Mercedes-Benz

    PartNumber: 4713
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1 mm
    • Overall Height: JIS
    • Reach: 18.00 mm
    • Seat Type: Tapered
    • Terminal Type: Solid
    • Thread Diameter: 14.00 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047136
    • Part Description: Mercedes-Benz Iridium TT™ Spark Plug
    More Info
    $7.01
  • Denso Iridium TT™ Spark Plug for Mercedes-Benz - 4714

    Denso® Iridium TT™ Spark Plug for Mercedes-Benz

    PartNumber: 4714
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .039" (1.0 mm)
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1 mm
    • Overall Height: JIS
    • Reach: 17.5 mm (.689")
    • Seat Type: Tapered
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511047143
    • Part Description: Mercedes-Benz Iridium TT™ Spark Plug
    More Info
    $7.03
  • Denso Double Platinum Spark Plug for Mercedes-Benz - 3004

    Denso® Double Platinum Spark Plug for Mercedes-Benz

    PartNumber: 3004
    Product Specifications
    • Electrode Material: Platinum
    • Gap: .043" (1.1 mm)
    • Heat Range: 16
    • Hex Size: 13/16" (21 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Spark Plug Reach: 0.748"
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511030046
    • Part Description: Mercedes-Benz Double Platinum Spark Plug
    More Info
    $6.08
  • Denso Double Platinum Spark Plug for Mercedes-Benz - 3301

    Denso® Double Platinum Spark Plug for Mercedes-Benz

    PartNumber: 3301
    Product Specifications
    • Electrode Material: Platinum
    • Gap: .031" (0.8 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 0.8 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Spark Plug Reach: 0.748"
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511033016
    • Part Description: Mercedes-Benz Double Platinum Spark Plug
    More Info
    $6.12
  • Denso Double Platinum Spark Plug for Mercedes-Benz - 5091

    Denso® Double Platinum Spark Plug for Mercedes-Benz

    PartNumber: 5091
    Product Specifications
    • Electrode Material: Platinum
    • Gap: .039" (1.0 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1 mm
    • Overall Height: JIS
    • Quantity: 1 Piece
    • Reach: 19 mm (3/4")
    • Seat Type: Tapered
    • Spark Plug Reach: 0.748"
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511050914
    • Part Description: Mercedes-Benz Double Platinum Spark Plug
    More Info
    $5.64
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5301

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5301
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053014
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $6.31
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5302

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5302
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053021
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $6.31
  • Denso Iridium Power™ Hot Type Spark Plug for Mercedes-Benz - 5303

    Denso® Iridium Power™ Hot Type Spark Plug for Mercedes-Benz

    PartNumber: 5303
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053038
    • Part Description: Mercedes-Benz Iridium Power™ Hot Type Spark Plug
    More Info
    $6.02
  • Denso Iridium Power™ Cold Type Spark Plug for Mercedes-Benz - 5304

    Denso® Iridium Power™ Cold Type Spark Plug for Mercedes-Benz

    PartNumber: 5304
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 20
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: ISO
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Solid
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053045
    • Part Description: Mercedes-Benz Iridium Power™ Cold Type Spark Plug
    More Info
    $6.02
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5305

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5305
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 16
    • Hex Size: 13/16" (21 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Removable Nut
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053052
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $6.29
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5306

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5306
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 20
    • Hex Size: 13/16" (21 mm)
    • Nominal Gap: 1.1 mm
    • Overall Height: JIS
    • Reach: 19 mm (3/4")
    • Seat Type: Gasket
    • Terminal Type: Removable Nut
    • Thread Diameter: 14 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053069
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $6.31
  • Denso Iridium Power™ Spark Plug for Mercedes-Benz - 5325

    Denso® Iridium Power™ Spark Plug for Mercedes-Benz

    PartNumber: 5325
    Product Specifications
    • Electrode Material: Iridium
    • Gap: .043" (1.1 mm)
    • Heat Range: 16
    • Hex Size: 5/8" (16 mm)
    • Nominal Gap: 1.1 mm
    • OE Part Number: IT16
    • Overall Height: JIS
    • Reach: 18.00 mm
    • Seat Type: Tapered
    • Terminal Type: Solid
    • Thread Diameter: 14.00 mm
    • Thread Pitch: 1.25 mm
    • UPC: 042511053250
    • Part Description: Mercedes-Benz Iridium Power™ Spark Plug
    More Info
    $6.17
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About Mercedes-Benz Spark Plug

Mercedes-Benz is a German vehicle automotive brand established in 1926. It is famous for its high-performing parts. Classic parts like the spark plugs contribute to the success of Mercedes-Benz. The Mercedes-Benz spark plugs are used for ionization of cylinders when they are not firing. The Mercedes-Benz spark plugs need a voltage of a minimum of 12,000 to 25,000 to work properly, and they can even surpass 25,000.
Mercedes-Benz stands out for its great parts. However, consumers will need new spark plugs if these parts are worn or damaged. The parts are made from an insulator that surrounds an electrode that protrudes down its center. The electrode protrudes from the end of the parts. They help produce a gap across the arc and into the combustion chamber which helps ignite the air/fuel mixture in the combustion chamber. Here are the steps to service the spark plugs. First, you should disconnect the negative battery terminal. Next, remove the spark plug wire boots by pulling and twisting them, and remove the spark plugs using the correct size socket. Then adjust the new spark plug gap with the spark plug gap tool and add anti-seize to the threads. Finally, tighten the new spark plugs to the proper torque, and plug in the spark plug wire boot to the new set of plugs. We offer you a variety of Mercedes-Benz parts at a reasonable price. There are a lot of premium Mercedes-Benz parts and devices online.