Best Spark Plugs For Mercedes Benz

When I first bought my Mercedes, the precision engineering was what truly impressed me. But maintaining that Mercedes Benz performance requires choosing components built to the same exacting standards. If you’ve started experiencing sluggish acceleration or rough idling, it’s time to talk about spark plug replacement. I’ve spent time testing and researching what works best for these specialized engines—because running a high-compression European engine on mediocre parts simply isn’t an option. Below is a detailed look at the best spark plugs for Mercedes Benz, focusing on longevity, ignitability, and the value they bring to your driving experience.

IMAGE	PRODUCT NAME	AMAZON LINK
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	Genuine Set of 4 Spark Plugs For Mercedes-Benz W205 C117…	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
	95983 Double Iridium Spark Plug Compatible with…	View on Amazon
	BOSCH YR7MPP33 OE Fine Wire Double Platinum Spark Plug -…	View on Amazon
	ENA Double Iridium Spark Plugs 6 Pack Compatible with…	View on Amazon
	ENA Set of 6 Ignition Coil with 12 Iridium Spark…	View on Amazon
	A-Premium Set of 4 Ignition Coil Pack and Iridium Spark…	View on Amazon
	A-Premium Iridium & Platinum Spark Plugs Compatible with…	View on Amazon

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

This A-Premium set is an excellent value option, particularly for Mercedes models equipped with the reliable M272/M273 V6 engines. By utilizing both Iridium on the tip and Platinum on the core, these plugs ensure outstanding longevity, giving you a smooth spark delivery that drastically improves cold starting. Engineered for longevity, this pack is designed to maintain optimal engine performance for up to 100,000 miles, making it a fantastic low-maintenance choice for daily drivers.

Key features that stand out:
– Dual Precious Metal Construction: Uses both Iridium (tip) and Platinum (core) for maximum wear resistance.
– Extensive V6 Fitment: Specifically designed to fit a wide range of popular 3.0L and 3.5L V6 Mercedes models from the mid-2000s to early 2010s.
– Optimized Gap Size: Factory gapped to 0.032 inches, simplifying installation right out of the box.

Pros:
– Long replacement interval (up to 100,000 miles).
– High value compared to OE dealer plugs.
– Excellent fitment for common V6 platforms.

Cons:
– While compatible with many models, always double-check your specific chassis code before purchasing.

Best for: Mercedes owners of older V6 models (like the E350 or ML350) seeking long-lasting reliability and excellent value.

Expert Opinion: The Iridium/Platinum combo is a robust solution for high-mileage Mercedes engines, offering great ignition stability without the premium price tag of pure OE components.

Genuine Set of 4 Spark Plugs For Mercedes-Benz W205 C117 W213 X156 R172

When you choose a Genuine Mercedes-Benz part, you are guaranteed OE (Original Equipment) quality and factory fitment. While the product description is sparse, the simple “Genuine Set” title speaks volumes: these plugs are what your vehicle came with, designed and tested by Mercedes specifically for modern 4-cylinder engines found in models like the C-Class (W205) and CLA (C117). Choosing genuine parts is the safest bet to maintain the precise ignition timing required by turbocharged M274 engines.

Key features that stand out:
– Original Equipment Quality: Guarantees factory performance and compatibility with sensitive modern engine management systems.
– Specific Fitment: Ideal for the contemporary generation of 4-cylinder turbo engines (found in models like C300 and CLA250).
– Assured Reliability: Reduces the risk of misfires or issues related to impedance variations that non-OE plugs can sometimes cause.

Pros:
– Guaranteed factory fit and function.
– Highest level of reliability and durability.
– Easiest installation due to guaranteed OE gap.

Cons:
– These typically come at a higher price point than aftermarket alternatives.

Best for: Owners of newer 4-cylinder Mercedes models who prioritize 100% factory compliance and wish to avoid any potential warranty issues.

Expert Opinion: For modern turbo engines, sticking with Genuine OE spark plugs is often recommended, as these components are meticulously matched to the highly specific requirements of the engine control unit (ECU).

A-Premium Iridium & Platinum Spark Plugs Compatible with Mercedes-Benz C300, C350e, E300, Sprinter, GLC300, CLA250, GLA250 & Infiniti Q50, Q60, QX30 & Freightliner Sprinter 1500 2500, Pack of 4

Here is another strong offering from A-Premium, but this set is tailored specifically for modern 4-cylinder turbocharged Mercedes engines (2.0L). These dual-precious-metal plugs are designed to handle the higher heat and compression of forced-induction engines, ensuring exceptional ignitability even under heavy load. If you drive a newer C300 or GLA250 and need reliable, long-life replacements, this pack of four is a cost-effective and high-performance solution.

Key features that stand out:
– Turbo-Optimized: Specifically engineered to match OEM standards (SILZKFR8E7S reference number), ideal for 2.0L turbo engines.
– Dual Iridium/Platinum: Provides great durability, recommended for 80,000 to 100,000-mile service intervals.
– Low Resistance: With a resistance of 1000 ohms, it ensures consistent and fast energy transfer for a powerful spark.

Pros:
– Excellent performance for high-heat turbo applications.
– Wide compatibility across popular 4-cylinder models (C300, GLC300).
– Outstanding blend of performance and longevity.

Cons:
– The required gap size (0.023-0.027 IN) is very small and requires careful handling during installation.

Best for: Owners of L4 2.0L turbocharged Mercedes engines (M274) who want OE performance longevity at an aftermarket price.

Expert Opinion: The use of Iridium for the center electrode is critical for turbo engines as it maintains performance under extreme temperatures far better than traditional materials.

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

This complete ignition kit from LCWRGS is designed for the Mercedes M272 V6 engine, offering not just spark plugs, but also six new ignition coils. This is the best solution for addressing multiple misfires or if your vehicle has high mileage and both components are due for replacement. The manufacturer claims this setup can upgrade power delivery by 15% compared to old OE coils, offering a noticeable improvement in engine performance and efficiency immediately after installation.

Key features that stand out:
– Complete Ignition Overhaul: Includes 6 coils and 6 spark plugs, providing everything needed for a full tune-up.
– Enhanced Performance: Coils are designed to exceed OE specifications, using highly conductive copper wire.
– Wide M272/M273 Compatibility: Fits numerous V6 models including E350, ML350, and R350 from the mid-2000s era.

Pros:
– Excellent value proposition (coils and plugs included).
– Direct OEM design ensures easy, bolt-on installation.
– Addresses the source of common misfire issues in older V6 models.

Cons:
– While coils are enhanced, their long-term reliability may vary compared to premium OE brands.

Best for: Mercedes owners of older V6 platforms requiring a full ignition system replacement (coils and plugs) due to poor running conditions or high mileage.

Expert Opinion: Replacing coils and plugs simultaneously is often wise, especially when troubleshooting hesitation or poor gas mileage. This kit provides a convenient, all-in-one approach.

95983 Double Iridium Spark Plug Compatible with MERCEDES-BENZ C250 C300 C350 CL550 CLK350 CLS550 E300 GL450 GL550 ML350 ML450 S350 S400 S450 Dodge Sprinter Set of 6

This is a premium-grade Double Iridium spark plug designed for massive longevity and exceptional ignition performance. Double Iridium means that both the center electrode and the ground electrode feature Iridium tips, maximizing service life up to 100,000 kilometers (approx. 62,000 miles) and ensuring a consistent, stable spark. The superior cold-start performance and quick acceleration make this a favorite for those who demand immediate response from their Mercedes.

Key features that stand out:
– Double Iridium Construction: Ensures maximum durability and extended service intervals.
– Superior Ignitability: Iridium firing pin provides faster starts and optimized fuel economy.
– Wide V6 and V8 Fitment: Excellent compatibility across numerous Mercedes 3.5L V6 and 5.5L V8 engines (M272/M273/M278 platforms).

Pros:
– Highly durable construction for long life.
– Improves throttle response and cold-start reliability.
– Excellent customer service and warranty support offered.

Cons:
– The Double Iridium designation often makes these slightly pricier per plug than single Iridium options.

Best for: Mercedes owners across a wide variety of platforms (especially those with V8 engines) who want high performance and long service life from a reputable aftermarket part.

Expert Opinion: Double Iridium is the gold standard for long-life spark plugs, offering a significant advantage in maintaining the factory gap over tens of thousands of miles.

BOSCH YR7MPP33 OE Fine Wire Double Platinum Spark Plug – Single

Bosch is synonymous with German engineering and is often the OE supplier for Mercedes-Benz components, including spark plugs. The YR7MPP33 is a classic Double Platinum design, highly recommended for specific Mercedes engines that require this composition for optimal heat transfer and longevity. This plug is manufactured in Europe to exacting standards, ensuring it meets or exceeds the original equipment specifications required by the ECU.

Key features that stand out:
– OE Quality Bosch: Manufactured by one of the key global automotive suppliers, ensuring strict quality control.
– Double Platinum Alloy: Precious metal alloy on both electrodes provides excellent wear resistance and a stable gap over time.
– Factory Pre-Set Gap: Installation is straightforward as no gap adjustment is needed or recommended by Bosch.

Pros:
– Reliable OE supplier quality.
– Excellent stability in older ignition systems.
– Robust construction designed for long, consistent performance.

Cons:
– Sold individually, which requires purchasing the exact number needed for your engine (4, 6, or 8).

Best for: Mercedes owners who prefer to use the same brand that often supplies the factory, ensuring compatibility and trust in the brand’s reputation for quality German components.

Expert Opinion: When in doubt about fitment or quality, Bosch is always a safe bet for European vehicles. Double Platinum provides proven longevity in non-turbo, naturally aspirated engines.

ENA Double Iridium Spark Plugs 6 Pack Compatible with Mercedes-Benz C300 E350 ML350 GLE350 GLK350 R350 SLK350 2012 2013 2014 2015 2016 2017 2018 3.5L V6 Sparkplugs Replacement for ZR6SII3320 7430

This ENA spark plug set is tailored for later model V6 3.5L engines (like the M276), focusing heavily on precise ignition delivery. These double Iridium plugs feature a fine-wire design which significantly enhances throttle response and drastically reduces the potential for misfires by providing a more concentrated spark. If you drive a newer E350 or GLE350, this pack offers high performance and a guaranteed good fit for your M276 engine platform.

Key features that stand out:
– Fine-Wire Iridium Design: Ensures precise ignition and improved fuel efficiency through focused spark delivery.
– M276 Engine Focus: Specifically targets post-2012 3.5L V6 engines common in modern E-Class and GLE models.
– Pre-Gapped: Engineered for easy, direct installation, eliminating the need for complex adjustments.

Pros:
– Greatly improved throttle response reported by users.
– Reduces misfires due to focused spark delivery.
– Highly durable Double Iridium construction.

Cons:
– Less suitable for pre-2012 V6 models, requiring careful year/model verification.

Best for: Owners of 2012 and newer Mercedes V6 3.5L engines (M276 generation) looking for enhanced responsiveness and long-term durability.

Expert Opinion: The fine-wire iridium technology is paramount for modern engines that rely on extremely precise combustion to meet stringent emission and performance targets.

ENA Set of 6 Ignition Coil with 12 Iridium Spark Plug and Wire Set Compatible with Mercedes-Benz Crossfire C240 C280 C320 CLK320 E320 ML320 ML350 SLK320 Replacement for 0001587303 UF359

For those driving classic V6 or V8 Mercedes models from the late 90s and early 2000s, this ENA kit offers an enormous amount of value: 6 ignition coils, 12 iridium spark plugs, and a wire set. This comprehensive package covers every single component in the older ignition system that is prone to wear, ensuring that misfires and rough idling are eliminated entirely. This is essential for bringing classic Mercedes platforms back up to peak performance.

Key features that stand out:
– Massive Tune-Up Kit: Includes coils, 12 plugs (enough for 2 tune-ups or a V12 engine, depending on application), and a wire set.
– Broad Classic Fitment: Compatible with a huge range of older 3.2L, 4.3L, and 5.0L Mercedes engines.
– Iridium Plugs Included: Provides a durable upgrade over older copper or platinum plugs.

Pros:
– Unbeatable value for a full ignition system refresh.
– Ideal for high-mileage vintage Mercedes models.
– Provides all necessary components, including ignition wires which often degrade over time.

Cons:
– You may end up with extra spark plugs if your engine only requires 6 or 8.

Best for: Enthusiasts and mechanics working on older Mercedes platforms (M112/M113 engines) who need a full, comprehensive ignition system replacement, including the often-overlooked wire set.

Expert Opinion: For engines relying on spark plug wires rather than coil-on-plug technology, replacing the wires is just as crucial as replacing the plugs, making this kit very beneficial.

A-Premium Set of 4 Ignition Coil Pack and Iridium Spark Plugs Compatible with Mercedes-Benz C300, C350e, E300, Sprinter, GLC300, GLC350e, GLA250, CLA250, Metris, SLC300, SLK300 & Infiniti Q50, Q60

This A-Premium kit is focused entirely on the modern L4 2.0L turbocharged engines, providing 4 Iridium spark plugs and 4 new ignition coils. When dealing with modern direct-injection turbo engines, both the coil and the plug work extremely hard. This package ensures you replace the entire system with high-quality Iridium components and new UF-820 specification coils, restoring fuel efficiency and providing a more stable idle speed and faster startup.

Key features that stand out:
– Iridium Spark Plug Material: Extends plug life nearly threefold compared to standard nickel or copper plugs.
– Integrated Kit: Eliminates ignition system variables by replacing both coils and plugs simultaneously.
– L4 Turbo Compatibility: Perfect fit for the vast range of modern 4-cylinder Mercedes models built after 2014.

Pros:
– Addresses both weak coil and old plug performance in one go.
– Coils meet stringent OE mounting and voltage specifications (12V).
– Improves fuel efficiency and reduces emissions right away.

Cons:
– Due to the nature of turbo engines, it is still recommended to use the highest quality gasoline available.

Best for: Owners of late-model 2.0L turbo Mercedes vehicles (C300, GLA250, GLC300) looking for a complete, high-performance ignition system refresh.

Expert Opinion: The synergy of a new high-output coil and a long-life Iridium plug is essential for maximizing the output and efficiency of modern turbocharged Mercedes engines.

A-Premium Iridium & Platinum Spark Plugs Compatible with Mercedes-Benz C300, C350, C400, C43, C450, E300, E350, E400, E43 AMG, S450, S550e, S560e, GLE350, GL450, GLC43, GLS450, SL400, ML350, Pack of 6

This final A-Premium selection targets a mixture of V6 3.5L (Flex Fuel) and V6 3.0L turbocharged engines, covering many of the newer, more advanced Mercedes models. These plugs feature Iridium and Platinum construction, providing the durability needed for vehicles that often run extended service intervals. They are explicitly designed to handle the unique thermal demands of Flex Fuel and turbocharged 3.0L AMG-line engines (like the C43 and GLC43).

Key features that stand out:
– Targeted for Modern Engines: Specifically engineered for compatibility with newer 3.0L turbo and 3.5L Flex Fuel V6 platforms.
– High Longevity: Designed for service intervals between 80,000 to 100,000 miles.
– Reference 95875 / SILZKFR8D7S: Confirms OE-level specifications for highly sensitive Mercedes ECU tuning.

Pros:
– Handles the higher thermal loads of Flex Fuel and modern turbo engines.
– Extremely broad V6 compatibility across recent Mercedes platforms.
– Outstanding long-term value and stability.

Cons:
– Requires extremely precise fitment verification due to the engine specification variations (e.g., conventional hex vs. internal hex plugs).

Best for: Owners of late-model Mercedes V6 models (post-2015) including performance and hybrid variants that need high-grade, long-life plugs.

Expert Opinion: Modern engines, particularly those using direct injection and turbocharging (like the 3.0L V6 biturbo), require plugs with very specific heat ranges, which these Iridium/Platinum designs are optimized to meet.

Comparison and Buying Short Insights

When picking the best spark plugs for your Mercedes Benz, the most important factor is the engine generation (M272 V6 vs. M274 Turbo L4 vs. M276 V6).

For owners with the classic M272/M273 V6 engines (pre-2012 E350, ML350): Look for kits like the A-Premium Iridium Platinum (Product 1) or the 95983 Double Iridium (Product 5). They offer excellent 100k-mile longevity and great compatibility across the platform.

If you drive a modern 2.0L Turbo (C300, CLA250, GLC300): The ignition system works harder. You should prioritize the A-Premium Iridium & Platinum 4-Pack (Product 3) or the full system upgrade kit (Product 9). These are specifically tailored for high-heat, turbocharged applications. If budget isn’t a concern, the Genuine Set (Product 2) provides the ultimate peace of mind.

For those needing a full ignition system replacement: Kits that include coils, such as LCWRGS (Product 4) or ENA (Product 8/9), offer superior value and immediately solve complex misfire issues caused by aging coils and plugs working together.

Remember: Double-check the OE reference number (like SILZKFR8E7S) against your current plug, as Mercedes often uses multiple suppliers (NGK, Bosch, Beru) even for the same engine.

The Winner’s Circle: Our Top Recommendations

Choosing the right components for your Mercedes is about matching performance to precision. Based on value, reliability, and specific engine needs, here are our top picks:

Best Overall Longevity (V6 Engines): The 95983 Double Iridium Spark Plug (Product 5) gets the nod here. Its Double Iridium construction ensures the longest lifespan and maintains the highest performance stability across diverse V6 and V8 naturally aspirated engines.

Best Value Ignition Kit (Older V6 Engines): The Set of 6 Ignition Coil Pack Spark Plugs (Product 4) is a standout. When you factor in the cost of six quality coils and six plugs, this LCWRGS kit provides the most comprehensive solution for high-mileage M272/M273 platforms.

Best for Modern L4 Turbo Engines: For the increasingly common C300 and GLC300 models, the A-Premium Set of 4 Ignition Coil Pack and Iridium Spark Plugs (Product 9) is the top choice. It directly addresses the higher demands of turbocharging by replacing both the plugs and coils, guaranteeing restored factory performance.

Frequently Asked Questions About the Best Spark Plugs for Mercedes-Benz

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

A: Most modern Mercedes engines (especially those using Iridium or Platinum plugs) have extended replacement intervals, typically between 80,000 to 100,000 miles. However, if you drive a high-performance AMG model or a vehicle that has been tuned or runs Flex Fuel, it’s often recommended to reduce that interval to 40,000–60,000 miles to ensure peak performance and prevent potential misfires under high boost.

Q2: What are the common symptoms that my Mercedes spark plugs need replacing?

A: The most common signs of failing spark plugs include rough idling (the engine shaking noticeably at a stop), hesitation or sluggish acceleration, poor fuel economy, or the illumination of the Check Engine Light (often triggered by an engine misfire, which requires the correct M272 spark plug or similar fitment).

Q3: Should I use Iridium or Platinum spark plugs for my Mercedes?

A: Almost all modern Mercedes engines are designed to run on either Iridium or Double Platinum plugs. Iridium spark plugs are generally considered superior for high-heat applications like turbocharged engines (e.g., C300 2.0L turbo), as Iridium offers the highest melting point and longest durability. Platinum is an excellent, long-lasting choice for older, naturally aspirated Mercedes Benz V6 engine models. Never use standard copper plugs unless specified by the manufacturer, as they will wear out too quickly.

Q4: Do Mercedes spark plugs need to be gapped before installation?

A: Most high-quality Iridium and Double Platinum spark plugs, especially those from reputable brands like Bosch or A-Premium, come pre-gapped to the precise specifications needed for your specific Mercedes engine. You should always verify the gap size with a feeler gauge, but generally, you should not attempt to adjust the gap on fine-wire Iridium plugs, as this can easily damage the delicate electrode tip.

Q5: Is it better to buy spark plugs and ignition coils separately or as a kit?

A: If your Mercedes has over 80,000 miles and you are noticing misfires, buying a coil and spark plug kit (like Products 4 or 9) is highly recommended. The ignition coils and spark plugs work as a pair, and an aging coil may not provide enough voltage to fire a new plug efficiently, while a failing plug can stress a good coil. Replacing them together guarantees optimum system performance.

Q6: Can using the wrong spark plug type damage my Mercedes engine?

A: Yes, using a plug with the incorrect heat range or physical dimensions can cause serious problems. A plug that is too “hot” can lead to pre-ignition and engine damage, while a plug that is too “cold” can cause fouling and poor performance. Always match the OE reference number (found on your old plug) or use the specific engine application guide provided in the product listings.