Best Spark Plugs For Mercedes C230

When my Mercedes C230 started running a little rough—that subtle hesitation when accelerating and a slightly choppy idle—I knew exactly where to start: the spark plugs. Choosing the correct plug isn’t just about avoiding a dreaded misfire; it’s essential for maximizing your luxury sedan’s engine performance and fuel economy. Whether you drive the older M111/M271 four-cylinder Kompressor or the later V6 M272, finding the best spark plugs for Mercedes C230 requires precision engineering like Iridium or Platinum. I’ve compiled this hands-on guide to help you choose tested options that will get your C-Class running smoothly again, ensuring longevity and reliability.

IMAGE	PRODUCT NAME	AMAZON LINK
	A-Premium Iridium & Platinum Spark Plugs Compatible with…	View on Amazon
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	Set of 6 Ignition Coil Pack Spark Plugs Fits for…	View on Amazon
	A-Premium Set of 4 Ignition Coil Pack and Iridium Spark…	View on Amazon
	UF535 Ignition Coil Pack/95983 Spark Plugs 6PCS For…	View on Amazon

A-Premium Iridium & Platinum Spark Plugs Compatible with Mercedes-Benz C230 2002, SLK230 2001-2004 & Saab 9-3 2004-2011, 9-3X 2010-2011, 2.0L 2.3L, Pack of 4

If you own the classic 2002 C230 L4 Kompressor, these A-Premium plugs are an excellent choice for reliable ignition performance. Designed to meet or exceed OEM specifications, this four-pack utilizes the superior conductive properties of iridium and platinum, giving you a strong, consistent spark. They are specifically optimized for older four-cylinder Mercedes engines, helping restore lost horsepower and smooth out any rough idling you might be experiencing. The Iridium center electrode ensures outstanding durability and excellent ignitability right out of the box.

Key features that stand out:

• Center Electrode Tip Material: Iridium for durability and conductivity.
• Engineered for Longevity: Recommended replacement interval of 80,000 to 100,000 miles.
• Gap Size: Pre-gapped at 0.035 inches, matching specifications for the 2.3L L4 engine.
• OEM Design: Designed alongside OEM standards for maximum ignition performance.

Pros:
– Excellent lifespan due to iridium and platinum construction.
– Specifically designed for the 2002 L4 2.3L C230 Kompressor model.
– Improves throttle response and fuel efficiency.

Cons:
– Only fits the specific four-cylinder C230 (2002) and not the later V6 models.

Best for: Owners of the 2002 Mercedes C230 with the L4 2.3L Kompressor engine looking for a direct OEM-spec replacement focused on high mileage.

Expert Opinion: This set is a dependable choice for those maintaining the M111/M271 engine platform. The combination of iridium and platinum offers a substantial performance upgrade over standard copper plugs, providing better cold starts and reduced wear over time.

A-Premium Iridium Platinum Spark Plugs Compatible with Mercedes-Benz E280, E300, GLK350, ML350, ML450, S350, SLK280, SLK300, R350, C250 & Mitsubishi Outlander & Dodge & Freightliner, Pack of 6

For those driving the newer generation of the C230 (V6 2.5L, 2006-2009 W204 chassis), you need a pack of six spark plugs. This A-Premium set provides platinum and iridium electrodes engineered for the V6 M272 engine. The advanced materials deliver a high-energy spark, resulting in more efficient combustion and enhanced overall engine output. With a long replacement interval, these plugs offer incredible value and reliability for the popular V6 platform shared across many Mercedes models.

Key features that stand out:

• Pack of 6: Correct quantity for V6 M272/M273 engines.
• High Resistance: Rated at 5000 ohms for stable electrical flow and noise suppression.
• Wide Vehicle Fitment: Covers various 2.5L, 3.0L, and 3.5L Mercedes V6 engines, confirming proper fitment for the later C230 V6 models.
• Material: Iridium tip and Platinum core ensure a sharp, focused spark over thousands of miles.

Pros:
– Ideal fitment for 2006-2009 C230 V6 engines.
– Long-lasting performance (80,000–100,000 miles interval).
– Restores smooth idle and resolves potential V6 misfires.

Cons:
– Requires careful confirmation of the engine code, as V6 specs differ greatly from the 4-cylinder models.

Best for: Owners of the 2006-2009 V6 C230 models who need a reliable, high-mileage six-pack of iridium/platinum plugs.

Expert Opinion: When servicing a V6 C230, it’s often easier to use plugs designed specifically for the M272 family like these. They handle the higher operating temperatures common in these engines well and provide the necessary resilience required by the OEM.

Set of 6 Ignition Coil Pack Spark Plugs Fits for 2006 2007 2008 2009 2010 2011 2012 Mercedes Benz E350 ML350 R350 C230 C280 C300 C350 GLK350 SLK350 CLK350 3.5 V6 Ignition Coils Spark Plugs UF535

Sometimes, changing the plugs isn’t enough; the coils can also contribute to misfires and poor performance. This comprehensive kit addresses both issues simultaneously. Specifically compatible with the 2006-2007 V6 C230, this set includes six high-performance ignition coils and matching spark plugs, providing a total ignition system overhaul. This product claims to upgrade 15% more energy than OE coils, ensuring a powerful and consistent spark, leading to better throttle response and potentially improved gas mileage.

Key features that stand out:

• Complete System Kit: Includes 6 coils (UF535) and 6 spark plugs.
• Premium Copper Wire: Highly conductive copper wire used in coils for better connectivity.
• Enhanced Performance: Designed to boost ignition energy output by 15% over standard OE parts.
• Warranty: Backed by a 24-month warranty for peace of mind.

Pros:
– Solves both spark plug and ignition coil issues in one package.
– Direct OEM design ensures easy, hassle-free installation.
– Significant upgrade in ignition energy leads to improved performance metrics.

Cons:
– While coils are included, the quality of included plugs might not match specialized long-life iridium plugs.

Best for: V6 C230 owners (2006-2007) dealing with persistent misfires or check engine lights, needing a complete ignition system replacement for maximum confidence.

Expert Opinion: We generally recommend replacing coils alongside plugs if the vehicle has high mileage (over 100k). This combined kit offers excellent value and efficiency, eliminating guesswork about which component is causing ignition issues.

A-Premium Set of 4 Ignition Coil Pack and Iridium Spark Plugs Compatible with Mercedes-Benz R170 Series SLK230 2001-2004, CL203 Series C230 2002, 2.3L

Here is another fantastic bundled option, but this time tailored for the four-cylinder, 2.3L Kompressor C230 (2002 model). This A-Premium kit contains four iridium spark plugs plus four direct-fit ignition coil packs. This is a must-have if you notice that classic sluggish feeling under acceleration, which often suggests tired plugs and weak coils that can no longer handle the boost pressures of the supercharged engine. The iridium plugs offer nearly a threefold life extension compared to standard plugs, making this a reliable and long-term solution.

Key features that stand out:

• Kit Contents: 4 Iridium Spark Plugs and 4 Ignition Coils (A0001501780 reference).
• Iridium Material Benefits: Ensures a more stable idle speed, better fuel efficiency, and reduced emissions.
• Fitment: Guaranteed fitment for the 2002 L4 2.3L C230 Kompressor (RWD only).
• Installation: Bolt-on mount type for simple DIY replacement.

Pros:
– Complete ignition refresh designed specifically for the L4 Kompressor engine.
– Iridium provides superior engine starting and performance under boost.
– Backed by a one-year unlimited-mileage guarantee.

Cons:
– Only applicable to the specific 2002 model year, limiting compatibility.

Best for: Owners of the 2002 2.3L C230 Kompressor who want to completely refresh their ignition system with high-quality, long-life components.

Expert Opinion: The L4 Kompressor relies heavily on efficient ignition, especially under load. Bundling coils and iridium plugs like this ensures optimal performance and prevents early coil failure often associated with running old, worn-out plugs.

UF535 Ignition Coil Pack/95983 Spark Plugs 6PCS For Mercedes 2005-2015 C230 C280 C300 C350 CLS550 G550 GLK350 ML550 S400 SL550 SLK280 SLK300,for Dodge Sprinter 2500 3500 19005267

This is another high-value, V6-specific coil and spark plug kit, covering C230 models from 2006-2007. Featuring the widely referenced UF535 coil pack OEM number and 95983 LKR7BGP8 spark plugs, this combo ensures you’re getting parts that are manufactured in TS16949 certified facilities, guaranteeing quality control. The included plugs feature a trivalent metal plating for superior anti-corrosion protection and enhanced longevity, making them perfect for daily driving conditions and high temperatures.

Key features that stand out:

• Quality Control: Manufactured in TS16949 certified facilities, ensuring reliability.
• Coil/Plug Match: Coils (UF535) and plugs (95983) are factory-matched for optimal performance on the V6 engine.
• Corrosion Resistance: Trivalent metal plated spark plugs offer excellent protection against seizing.
• Fitment Range: Wide range of compatibility across the Mercedes V6 and V8 family (M272/M273).

Pros:
– Excellent quality control and rigorous testing standards (103% function tested).
– Coil/plug combination offers an immediate and noticeable performance uplift.
– Highly resistant to engine heat and chemical corrosion.

Cons:
– The sheer number of compatible models listed might require double-checking specific V6 C230 sub-model requirements.

Best for: V6 C230 owners seeking a rigorously tested, high-quality replacement kit for both coils and plugs, prioritizing long-term reliability and anti-corrosion features.

Expert Opinion: When looking at aftermarket bundled kits, certifications like TS16949 are critical. This product’s focus on strict quality control provides assurance that you won’t face premature failure, which is especially important for complex V6 engines.

Comparison Short Insights

When evaluating the best spark plugs for Mercedes C230, the first distinction you must make is based on your engine type: 4-Cylinder Kompressor (L4 2.3L) vs. 6-Cylinder V6 (2.5L or 3.0L). If you have the older Kompressor model, you’ll need a pack of four, like the A-Premium Iridium & Platinum (Product 1) or the bundled Coil/Plug Kit (Product 4). These are optimized for forced induction.

If you drive the newer V6 C230 (2006 onwards), you absolutely require a six-pack. Between the single plug sets (Product 2) and the coil/plug kits (Products 3 and 5), your decision hinges on the vehicle’s mileage and current running condition. If your coils are original and mileage is high (over 80,000 miles), choosing a bundle provides the best preventative maintenance and performance upgrade.

Focusing purely on plug material, the Iridium and Platinum combinations are standard for modern Mercedes engines, offering superior durability and ignition efficiency compared to standard copper or nickel plugs. The long replacement interval of 80,000 to 100,000 miles offered by Products 1 and 2 is a key benefit for owners seeking maximum maintenance convenience.

Final Verdict: Choosing the Right Spark Plug

Selecting the right plug depends entirely on your specific C230 engine and your maintenance needs. Here’s a quick breakdown of who should buy which set:

Best for High-Mileage V6 Reliability: The A-Premium Iridium Platinum Spark Plugs (Pack of 6, Product 2) win for V6 owners who only need plugs. They offer the optimal material composition (Iridium/Platinum) for extreme longevity and consistent performance across the M272 platform.

Best Complete Ignition Overhaul (V6): If you suspect coil failure or simply want a full refresh, the Set of 6 Ignition Coil Pack Spark Plugs (Product 3) offers exceptional value. Getting OE-spec coils and plugs together is the most efficient way to eliminate misfire symptoms caused by age or wear.

Best for the 2002 Kompressor Engine: The A-Premium Set of 4 Ignition Coil Pack and Iridium Spark Plugs (Product 4) is the clear winner for L4 C230 owners. This kit is specifically tailored to the Kompressor’s requirements and provides both new coils and long-life iridium plugs, ensuring the supercharged engine gets the clean, powerful spark it needs.

Common Questions About the Best Spark Plugs for Mercedes C230

Q1: How often should I replace the spark plugs in my Mercedes C230?

A: For modern Mercedes C230 models using high-quality Iridium or Platinum spark plugs (which all the products reviewed utilize), the general recommended replacement interval is between 80,000 to 100,000 miles. However, if you notice symptoms like rough idle, misfire, or decreased gas mileage, you should inspect and potentially replace them sooner, regardless of the mileage.

Q2: What are the common symptoms of bad spark plugs in a Mercedes C230?

A: The most common symptoms include the engine misfire (especially noticeable during acceleration), a rough or inconsistent idle speed, difficulty starting the car, reduced power, and poor fuel economy. In severe cases, the “Check Engine” light may illuminate, indicating a cylinder misfire code (P0300 series).

Q3: Do I need 4 spark plugs or 6 spark plugs for my C230?

A: It depends entirely on your engine:
* 4 Plugs: Required for C230 models equipped with the 4-cylinder (L4) 2.3L Kompressor engine (typically model years up to 2005).
* 6 Plugs: Required for C230 models equipped with the 6-cylinder (V6) 2.5L or 3.0L engine (typically model years 2006 and later). Always confirm your engine type before purchasing.

Q4: Should I replace the ignition coils when changing the spark plugs?

A: While not strictly required every time, replacing the ignition coil packs at the same time is highly recommended, especially if your vehicle has over 80,000 miles or if you are experiencing intermittent misfires. Old coils often struggle to keep up with new plugs, leading to premature plug fouling or persistent ignition issues. Buying a bundled kit (like Products 3 or 5) saves labor time and ensures all ignition components are fresh.

Q5: Do these spark plugs come pre-gapped, and do I need to check the gapping?

A: Most high-quality Iridium or Platinum Mercedes C230 spark plugs are sold pre-gapped. However, due to handling and shipping, it is always a good practice to double-check the gap size against the manufacturer’s specifications for your specific engine model using a proper gapping tool. Iridium tips are brittle, so use caution when adjusting the gap.

Q6: What is the difference between Iridium and Platinum spark plugs?

A: Iridium is generally the superior material. Iridium is harder, stronger, and has a much higher melting point than platinum, allowing the center electrode to be finer and sharper. This results in a more reliable spark and much longer service life. Plugs featuring both materials (Iridium tip, Platinum ground electrode) offer the best longevity and ignition stability.