Mercedes C63 Spark Plug Replacement In Dubai
Is your Mercedes C63 misfiring, lagging on throttle, or struggling with fuel economy? It might be time for a C63 spark plug replacement. AMG engines like the M156 and M177 rely on 8 high-performance spark plugs to maintain proper ignition timing, and in Dubai’s heat, they wear out faster—usually around 40,000 to 45,000 km, not the 60,000 km many assume. At our garage, we use OEM or iridium spark plugs designed for AMG setups and install them using factory torque specs—no shortcuts, no guessing. We offer a 10% discount on labor this month and a free diagnostic scan with every plug replacement. Don’t risk damage to coils or your catalytic converter—book your Mercedes C63 spark plug replacement in Dubai today with us.

What Are Spark Plugs in Mercedes C63?
Spark plugs are small parts that help your Mercedes C63 engine start and run. They create a spark that lights the fuel inside the engine, making power for your car to move. Each C63 engine—whether it is the M156 6.2L V8 or the M177 4.0L twin-turbo V8—uses 8 spark plugs, one for each cylinder. These plugs must fire at the right time, every time, especially in a high-performance engine like the C63.
In Dubai’s hot weather and heavy traffic, spark plugs wear out faster than usual. While Mercedes recommends changing them every 60,000 km, we often see problems by 40,000 to 45,000 km. Worn-out plugs can cause slow starts, rough idling, poor fuel economy, and engine misfires. Replacing them with the right type—usually iridium or platinum OEM spark plugs—keeps your engine smooth, powerful, and ready for any drive.
Types of Spark Plugs Used in Mercedes C63
The Mercedes C63 AMG uses 8 spark plugs, and the correct type depends on the engine—either the M156 6.2L V8 or the M177 4.0L twin-turbo V8. These engines run hot and need strong, high-quality plugs to keep ignition smooth, especially in Dubai’s driving conditions. Here are the actual spark plug types used:
🔧 For M156 Engine (2008–2015 C63 AMG)
- NGK LKR8AP (97506) – This is the factory-installed OEM spark plug for the M156. It handles high heat and strong ignition loads.
- Bosch FR7KPP332 – Another common OEM-type plug used for this engine.
- NGK Iridium IX – A good choice for tuned or high-performance M156 engines. Iridium tips last longer and stay strong under pressure.
🔧 For M177 Engine (2015+ C63 / C63 S AMG)
- NGK SILZKFR8E8S (95770) – This is the original spark plug installed in the newer M177 twin-turbo engine. It’s built for turbo heat and fast firing.
- Bosch 0242145541 – A reliable option that matches factory specs.
- Brisk Silver Racing DR14S – Used in tuned C63 AMG setups where a colder spark plug is needed for extra boost.
These Mercedes C63 spark plugs must be installed with the correct gap (0.8 mm) and torque (23 Nm). Using the right plug keeps the engine running clean and strong. The wrong type can lead to misfires, warning lights, or engine wear. Always choose spark plugs that match your driving style—whether daily use or performance tuning.
When to Replace Spark Plugs in Dubai
In normal conditions, Mercedes recommends replacing spark plugs every 60,000 km for the C63 AMG. However, Dubai’s heat, traffic, and stop-start driving put extra stress on the engine. In our garage, we often find that plugs in the Mercedes C63 start to wear out by 40,000 to 45,000 km—sometimes even earlier in tuned or hard-driven cars.
High temperatures cause faster electrode wear, and short trips prevent plugs from cleaning themselves properly. If you own a C63 AMG and drive daily in city traffic or during hot months, it is better to replace the spark plugs before 50,000 km. This keeps the engine smooth, fuel-efficient, and avoids problems like misfires or coil damage.


Signs Your Spark Plugs Need Replacement in Mercedes C63
In the Mercedes C63 AMG, especially models with the M156 or M177 engine, spark plugs play a key role in keeping the ignition system stable. Based on our diagnostic reports in Dubai, here are specific signs that the spark plugs are worn or failing:
- Misfire Code P0304 or P0306
These codes show up when cylinder 4 or 6 fails to ignite properly—most common after 40,000 km on M156 and M177 engines. - Engine Shaking at Idle (600–700 RPM)
Rough idle with RPM jumping by ±50 is a clear sign of uneven firing, often caused by weak or fouled spark plugs. - Check Engine Light with Fuel Trim Error
Diagnostic tools reveal long-term fuel trims above +10%, as the engine tries to balance poor combustion from worn plugs. - Acceleration Delay (0–100 km/h Slower by 1 sec)
A tuned C63 that used to hit 100 km/h in 3.9 seconds might now take over 5 seconds, showing plug degradation. - Carbon-Fouled Plug Tips During Inspection
At around 45,000 km, we often remove plugs and find blackened electrodes or oil buildup—especially if there’s a valve cover leak. - Engine Struggles on Cold Start
A noticeable crank delay or rough start when the car is cold, especially in the morning, usually means the plugs are no longer sparking well.
If you experience any of the above, it’s time to schedule a Mercedes C63 spark plug replacement—waiting too long can damage ignition coils or lead to catalytic converter issues.
Mercedes C63 Spark Plug Replacement Cost in Dubai
At our specialized Mercedes garage in Dubai, we provide Mercedes C63 spark plug replacement services with transparent and competitive pricing. Our services cater to both M156 (6.2L V8) and M177 (4.0L twin-turbo V8) engine variants, ensuring optimal performance and longevity.
🔧 Spark Plug Replacement Cost Breakdown:
- Standard Service (OEM Spark Plugs):
- Labor: AED 350–500
- Parts (8 OEM spark plugs): AED 400–600
- Total: AED 750–1,100
- Performance Service (High-Performance Spark Plugs for Tuned Engines):
- Labor: AED 500–650
- Parts (8 high-performance spark plugs): AED 600–900
- Total: AED 1,100–1,550
💡 What’s Included:
- Installation of 8 spark plugs with correct torque and gap settings
- Engine diagnostics and misfire code scan
- Visual inspection of ignition coils and plug condition
- Resetting of ECU ignition parameters
🎁 Current Offers:
- 10% discount on labor charges for first-time customers
- Free engine diagnostic scan with every spark plug replacement
- Complimentary pick-up and drop-off service within Dubai
For a precise quote tailored to your Mercedes C63 AMG, please contact us directly. Our team is ready to provide expert service and ensure your vehicle performs at its best.
How We Replace Spark Plugs – Step by Step
We follow a clear, detailed process for every Mercedes-Benz C63 spark plug replacement at our Dubai garage. Whether your C63 has the M156 6.2L V8 or M177 4.0L twin-turbo V8, we use proper tools, factory torque specs, and OEM or iridium spark plugs to keep your engine running smooth. Here’s our actual step-by-step method:
- Run Diagnostic Scan (XENTRY or Autologic) – We connect the car to Mercedes XENTRY to check for fault codes like P0300–P0308 (misfires) or fuel trim errors. Live misfire counters and coil voltage readings help confirm faulty spark plugs before any parts are removed.
- Remove Engine Covers and Ignition Coil Packs – We unclip and remove the engine top covers, air intake ducts and coil wiring harnesses. Ignition coils are carefully pulled using coil puller tools to prevent cracking—especially on M177 coils, which are tightly packed.
- Clean Plug Wells With Compressed Air – Before removing the old spark plugs, we blow compressed air into each plug well to prevent dirt or sand from falling into the combustion chamber. This is especially important in Dubai’s dusty environment.
- Remove Spark Plugs Using Torque-Limited Tools – We use a 3/8″ drive torque wrench with a magnetic spark plug socket to safely remove the plugs. Old plugs are inspected for carbon fouling, oil leaks, or burnt tips—common after 40,000–45,000 km in C63s.
- Install New Spark Plugs (OEM NGK or Bosch) – We install NGK LKR8AP (97506) for M156 or NGK SILZKFR8E8S (95770) for M177 engines. Gap is checked with a feeler gauge and set to 0.8 mm. Each plug is torqued to 23 Nm using a calibrated wrench. Anti-seize compound is applied only if cylinder head threads show signs of corrosion.
- Reinstall Coils and Secure Connectors – Coils are placed back in the same position, and dielectric grease is applied to the boots. We tighten all fasteners using a T30 Torx bit and re-secure intake ducts and covers.
- Final Test and ECU Reset – We restart the engine and re-scan using XENTRY. If no misfire codes return, we clear fault history and reset the ignition adaptive values. A road test confirms smooth acceleration and stable idle.
This step-by-step method ensures your Mercedes C63 spark plug replacement is done right the first time—without cutting corners or risking engine damage.
Tools and Parts We Use – Mercedes C63 Spark Plug Replacement
At our Mercedes garage in Dubai, we use the exact tools and high-quality parts required for Mercedes C63 spark plug replacement. Each step is handled using factory-correct specifications to ensure your AMG engine stays reliable and performs at its best. Whether you own a C63 with the M156 6.2L or the M177 4.0L twin-turbo, here’s what we use to get the job done right:
- NGK OEM Spark Plugs – We install NGK LKR8AP (97506) for M156 engines and NGK SILZKFR8E8S (95770) for M177 engines. These are the same spark plugs used at the factory. They come pre-gapped at 0.8 mm and are built to handle AMG firing loads and temperature.
- Bosch OEM-Equivalent Spark Plugs – As a reliable alternative, we also use Bosch FR7KPP332 or Bosch 0242145541, which match Mercedes standards and are suitable for both stock and tuned engines.
- Snap-on 3/8″ Drive Torque Wrench – This is used to tighten plugs to exactly 23 Nm, the required spec for C63 engines. Overtightening can damage the threads, so this step is never done by feel.
- 14 mm Magnetic Spark Plug Socket – We use magnetic sockets to safely remove and install spark plugs deep inside the cylinder heads. This prevents the plug from falling and cracking during handling.
- Feeler Gauge Set (0.75–0.85 mm) – Used to measure and adjust the plug gap. Although most plugs are pre-gapped, we always verify the correct spacing to avoid misfire or weak ignition.
- Ignition Coil Puller Tool – Essential for removing AMG ignition coils, especially on tight M177 engine bays. This tool prevents coil breakage or wire damage during removal.
- Compressed Air Gun – Before removing any plug, we clean the area with compressed air to remove sand or dust. This is very important in Dubai’s climate to avoid particles falling into the engine.
- XENTRY Diagnosis System – Mercedes’ official diagnostic tool. We use it to read live misfire data, confirm fault codes like P0304, and reset the ECU after new plugs are installed.
- Dielectric Grease – Applied to ignition coil boots to ensure strong electrical contact and reduce the chance of arc faults or moisture buildup.
- Anti-Seize (Used Only When Needed) – We use a small amount on plug threads only if there’s corrosion risk, usually in older engines or those with high mileage.
Every Mercedes C63 spark plug replacement job we do is handled using these exact tools and parts—no guesswork, no shortcuts. This ensures the job is done to AMG standards, with long-term reliability and engine safety.

Extra Checks We Perform During Spark Plug Replacement
When we carry out a Mercedes C63 spark plug replacement, we do more than just swap the plugs. To protect your engine and catch early issues, we include several important checks during the same visit—at no extra cost for inspection. These checks help us find other problems that might affect ignition, performance, or long-term engine health.
- Ignition Coil Condition Check – We inspect each coil for signs of cracking, carbon tracking, or heat damage. If any coil is weak or showing signs of misfire, we inform you before reinstallation.
- Valve Cover Leak Inspection – Oil in the spark plug wells is a common issue on C63 models. We check for leaks around the valve cover gaskets that could lead to plug fouling or coil failure.
- Live Misfire Data Monitoring – Using XENTRY, we check live cylinder performance to make sure the misfire counters are stable after plug installation. This ensures all cylinders are firing correctly.
- Compression Drop Clues – If plug tips show uneven wear or heavy deposits on certain cylinders, we make a note. This could be an early sign of compression imbalance, and we may recommend a follow-up compression test.
- Air-Fuel Ratio and Fuel Trim Scan – We run a short test to check if long-term fuel trims are within range. Abnormal values may point to intake leaks or injector issues—not just plugs.
- Exhaust Odor and Idle Sound Check – We check tailpipe smell for raw fuel (a sign of incomplete combustion) and listen to the idle for uneven rhythm. This confirms whether the engine is running clean post-replacement.
These extra checks during your Mercedes C63 spark plug replacement help prevent future problems and give you peace of mind. It’s part of our complete service approach—focused on performance, safety, and long-term engine health.

Why Choose Us for Mercedes C63 Spark Plug Service
When it comes to Mercedes C63 spark plug replacement in Dubai, not every garage understands the demands of AMG engines. At our workshop, we go beyond basic plug changes—we follow correct torque specs, use approved diagnostic tools, and work with M156 and M177 engines daily. Here’s why C63 owners trust us:
- Specialized in AMG Engines – We handle over 25 Mercedes C63 spark plug replacements every month, including tuned and stock models. Our team knows the layout of the M177 twin-turbo and M156 naturally aspirated engines inside out.
- OEM Parts Always Used – We use only NGK LKR8AP (97506) or NGK SILZKFR8E8S (95770) plugs—same as factory-installed. We never install low-grade or generic plugs that might cause misfires or early wear.
- XENTRY-Based ECU Reset and Scan – After every plug job, we run a full scan using Mercedes-Benz XENTRY diagnostics. We clear any stored codes, check misfire data, and reset ignition values so your car runs perfectly.
- Clean and Damage-Free Removal – Our team uses coil pullers, torque-limited tools, and anti-static gloves to remove components without breaking covers, clips, or wires—no broken plastic, no missing screws.
We don’t rush the job, and we don’t guess. Our focus is long-term performance and proper ignition function. If you want your Mercedes C63 AMG to stay strong, smooth, and safe—this is the service your engine deserves.

Book Your Mercedes C63 Spark Plug Replacement in Dubai Today
If your Mercedes C63 AMG is showing signs of misfire, rough idle, or poor throttle response, do not wait—spark plug failure can lead to coil damage or even catalytic converter issues. At our Dubai garage, we offer same-day appointments for Mercedes C63 spark plug replacement, using OEM NGK plugs and applying the exact 23 Nm torque spec. We service both M156 and M177 engines, and every job includes a full engine scan, misfire code check, and ignition reset using XENTRY diagnostics.
We also offer a free engine health check with every plug job and 10% off labor charges for new customers. Whether your car is stock or tuned, we use only the right tools and parts. You can book your appointment through WhatsApp, phone, or our online form. Free pick-up and drop-off is available across Dubai. Keep your Mercedes C63 running smooth—book your spark plug service now and let our AMG team take care of the rest.
FAQs About Mercedes C63 Spark Plug Replacement in Dubai
Yes, we offer a standalone spark plug inspection service. We remove and examine one or two plugs to check wear, gap erosion, or oil fouling—especially useful if your C63 is showing mild misfire or hesitation. This allows us to decide if a full Mercedes C63 spark plug replacement is needed or if the issue lies elsewhere (e.g., coils, injectors, or air leaks).
Absolutely. After every Mercedes C63 spark plug job, we provide a detailed report that includes:
- Plug brand and part numbers installed
- Torque values used
- Before-and-after diagnostic scan results
- Misfire history and reset confirmation
This helps you maintain your service history, especially important for AMG resale value in Dubai.