ZR6SII3320 Bosch Spark Plug
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Bosch Spark Plug | ZR6SII3320

Mercedes E350, C300, ML350, S550, GL450, GLK350, E550, GLE350, CLS550, SL550 & more
$11.39
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$11.86
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$24.50
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P/N: ZR6SII3320 Bosch OEM
Cross References:
  • 0242140521
  • 0041592503
  • 0041596003
  • 0041596303
  • 0041596403
  • 0041598103
  • 2761410180
  • BS0041598103
Part Details:
  • Original equipment Bosch 7430 spark plug replacement for Mercedes spark plug part number 0041598103
  • Used to ignite air/fuel mixture in cylinders for combustion in Mercedes M276 V6 and M278 and M157 V8 engines
  • (6) per V6 engine, (8) per V8 engine
  • This Bosch 7430 spark plug replaces fouled spark plugs that are not igniting air/fuel mixture in the engine for combustion
  • Recommended to be replaced when replacing ignition coils
  • Recommended to be replaced every 60,000 miles
  • Not for models with Ethanol Fuel code 929
  • Fits Mercedes C300 2013-2014, C350 2012-2015, CL550 2011-2014, CL63 AMG 2011-2014, CLS550 2012-2018, CLS63 AMG 2012-2014, CLS63 AMG S 2014-2018, E350 2012-2016, E400 Hybrid 2013-2015, E550 2012-2017, E63 AMG 2012-2015, E63 AMG S 2014-2016, G63 AMG 2013-2018, GL450 2013-2014, GL550 2013-2016, GL63 AMG 2013-2016, GLE350 2016-2018, GLE63 AMG 2016-2019, GLE63 AMG S 2016-2019, GLK350 2013-2015, GLS550 2017-2019, GLS63 AMG 2017-2019, Maybach S550 2017, ML350 2012-2015, ML550 2012-2014, ML63 AMG 2012-2015, R350 4Matic 2012, S550 2012-2017, S63 AMG 2011-2017, SL550 2013-2020, SL63 AMG 2013-2019, SLK350 2012-2016, and SLK55 AMG 2012-2016

Spark plugs provide the spark needed to ignite the air/fuel mixture in each cylinder for engine combustion. High voltage from the ignition coil is transferred through the spark plug to an air gap between the spark plug tip and the spark plug ground to the engine. Once the voltage reaches the air gap, the voltage jumps the gap in the form of a spark, igniting a compressed air fuel charge inside the cylinder. The air fuel charge explodes, creating the force needed to push the cylinder down and turning the engine crankshaft to propel the engine. In short, spark plugs serve a vital function in keeping your Mercedes running properly.

Components of a Spark Plug
  • A metal terminal that connects to the ignition system
  • A center electrode for current to flow through the spark plug with a tip for the current to jump making the spark
  • A ribbed ceramic insulator to keep current flowing through the spark plug center electrode and not into other parts of the engine
  • A threaded metal case to anchor the spark plug into the cylinder head with a ground electrode for the spark to jump to
  • A seal to seal the spark plug case to the cylinder head to prevent cylinder compression from escaping
Types of Spark Plugs

The biggest differences in spark plug construction are the materials used for the electrodes, their conductivity, and their wearability.

  • Copper is the base material for the center electrode on most spark plugs as it provides superb conductivity. These tend to wear quickly from the electrical transfer created by the spark and fully copper spark plugs need to be replaced every 15,000 miles.
  • Copper core spark plugs with yttrium or nickel tipped electrodes and grounds take longer to wear and can last up to 30,000 miles.
  • Platinum tipped copper core electrodes wear even less, provide superior conductivity, and can last up to 60,000 miles.
  • Iridium tipped copper core spark plugs wear the least and can last over 100,000 miles.

When a spark plug fails prematurely it will provide a weak spark or no spark at all. Causes of premature spark plug failure can include oil leaking from the valve cover into the spark plug chamber, your engine running too lean and overheating the spark plug, and your engine running too rich and fuel fouling the plug.

Most engines are designed to run on only one type of spark plug based on its use. Be sure to check your owner’s manual for the right type of spark plug needed for your Mercedes.

View more Mercedes Spark Plugs.

Bosch is the world's largest supplier of components to the automotive industry. The Bosch product line includes alternators & starters, brakes, electronic controls and sensors, fuel system parts and management, ignition system components, and steering system components. All Bosch automotive parts are either OEM (Original Equipment Manufacturer) or made to their specs as a replacement part for the OEM unit.
Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

Frequently Viewed Together

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What This Bosch Spark Plug Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

Mercedes
13-14 - C300 4Matic, 4Matic Luxury, 4Matic Sport
12-15 - C350 Base, 4Matic, Sport
Not for cars that use Ethanol Fuel (Code 929). There was mixed installation of the spark plugs in this vehicle. Check the plugs in the car before replacing.
13-13 - C350 Coupe
Not for cars that use Ethanol Fuel (Code 929). There was mixed installation of the spark plugs in this vehicle. Check the plugs in the car before replacing.
11-14 - CL550 4Matic
11-14 - CL63 AMG
12-18 - CLS550 Base, 4Matic
12-14 - CLS63 AMG Base, 4Matic
14-18 - CLS63 AMG S 4Matic
12-16 - E350 Base, 4Matic
Check the number on the spark plug in the vehicle before ordering. There was mixed installation on some models.
12-12 - E350 Bluetec
M276 Manufacturer torque specifications must be followed These plugs require indexing; Fuel Type: GAS
13-13 - E350 Bluetec
Manufacturer torque specifications must be followed These plugs require indexing; Fuel Type: GAS
13-13 - E350 Coupe/Convertible
Check the number on the spark plug in the vehicle before ordering. There was mixed installation on some models.
13-13 - E350 Sedan
Check the number on the spark plug in the vehicle before ordering. There was mixed installation on some models.
14-15 - E400 Hybrid
Not for cars that use Ethanol Fuel (Code 929).
12-17 - E550 Base, 4Matic
12-15 - E63 AMG Base, 4Matic
14-16 - E63 AMG S 4Matic
13-18 - G63 AMG
13-14 - GL450