Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
Picking the right Mercedes-Benz GLC ignition coil matters because a failing coil can cause rough idle, misfires, and reduced drivability. You want a part that fits precisely, delivers consistent spark energy, and lasts under the vehicle's typical duty cycle.This guide highlights seven shortlisted ignition coils that meet those goals. We evaluated each option on electrical performance and fitment accuracy, along with durability and connector integrity. Read on to see which features to prioritize before you replace an ignition coil.
Looking for other parts? See all Mercedes-Benz GLC parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Delphi GN10142 Ignition Coil |  |
| Most Popular A crowd favorite that many people choose with confidence | Bosch Original Equipment Ignition Coil (single) |  |
| Best Quality Built to a higher standard if you want something more solid | A-Premium Ignition Coil Pack Set with Iridium Spark Plugs (Set of 6) |  |
| Best Budget The cheapest option that still gets the job done reliably | AZ-HAPPYMALL Ignition Coil for Mercedes-Benz (UF-744 / 2709060500) |  |
| Most Sold A high-volume bestseller chosen again and again | Bosch Ignition Coil (0221604067) – Single |  |
| Best Value for Money The sweet spot between price and what you get | LCWRGS Set of 6 Ignition Coil Packs for 3.5L V6 Mercedes-Benz (UF535/UF585 Equivalent) |  |
| Best Overall The best all-around choice for most situations | ECCPP Ignition Coil Pack with Iridium Spark Plugs (set of 4) |  |
1. Delphi GN10142 Ignition Coil
| Brand | Delphi |
|---|---|
| Vehicle Service Type | Car |
| Installation Type | Screw-In or Bolt-On |
| Connector Gender | Male |
The Delphi GN10142 ignition coil is a direct-fit replacement coil intended to restore spark delivery and engine smoothness on compatible vehicles. It installs in place of a worn coil using the original mounting points and electrical connector and is typically used to replace a misfiring cylinder or to prevent drivability issues caused by degraded ignition components. The design emphasizes durability with controlled winding lengths, high-quality wire coatings, and epoxy potting that reduces air bubbles to improve insulation and resist energy punch-through. In practice that means reliable spark performance and a lower chance of premature electrical failure when compared with low-cost generic coils. Limitations include occasional fitment tolerance issues reported by some owners and differences in construction details versus a factory coil, so careful inspection at install and correct torqueing are recommended. If you need a straightforward replacement to get a GLC back to smooth operation, this coil delivers consistent real-world results when it matches factory fitment.
Best for: Reliability-focused buyers who prioritize a proven, factory-quality replacement to restore smooth running and prevent repeat misfires on their Mercedes-Benz GLC.
Less Ideal for: Buyers seeking an upgraded performance coil or an exact factory-replica build for concours-level restorations should consider other options.
- Factory-quality design and winding control aimed at reliable spark delivery
- High-grade wire coatings and epoxy potting to reduce insulation failures
- Direct-fit, vehicle-specific replacement that uses original connector and mounting points
- Some users report fitment and mounting-bushing differences compared with factory coils
- Not all construction details match factory original which may concern highly exacting restorations
Verdict A dependable, factory-quality replacement coil intended to restore reliable spark and drivability when it matches GLC factory fitment.
2. Bosch Original Equipment Ignition Coil (single)
| Brand Name | Bosch |
|---|---|
| Item Type Name | Ignition Coil |
| Manufacturer Part Number | 221503035 |
| Installation Type | Plug In |
| Part Interchange Info | 0001587803 |
This Bosch ignition coil is a single, direct-fit replacement built to meet or exceed factory-quality specifications for Mercedes-Benz applications. It supplies the correct high voltage to the spark plug electrode to improve cold starts, smooth idle and combustion consistency after installation. Typical use is as a one-to-one replacement when a misfire code or weak spark indicates a failed coil; installation is plug-in style so it is straightforward for a technician or experienced DIYer working on a GLC. Notable features include corrosion-resistant electrical connections and engineering for temperature and vibration resistance, which translate to reliable electrical contact and longer service life in an engine bay. Practical benefits are restored performance, reduced rough-idle and fewer diagnostic headaches compared with generic no-name parts. Limitations are that this listing is for a single coil pack rather than a multi-pack and compatibility must be checked against the GLC engine option and part interchange numbers before purchase.
Best for: Convenience-driven buyers who want a straightforward, factory-quality replacement to quickly fix a misfire or restore smooth running without extra diagnostic hassles.
Less Ideal for: Buyers looking to replace all coils at once or seeking a bulk multi-pack should consider multi-piece options instead.
- Factory-quality design that matches Mercedes-Benz replacement specifications
- Corrosion-resistant connectors for reliable electrical contact
- Engineered for temperature and vibration resistance to improve durability
- Plug-in installation simplifies replacement for technicians and competent DIYers
- Sold as a single coil so multiple purchases are needed for full-bank replacement
Verdict A reliable factory-quality single replacement coil for Mercedes-Benz GLC owners who need a quick, convenient fix for misfires or weak spark.
3. A-Premium Ignition Coil Pack Set with Iridium Spark Plugs (Set of 6)
| Applicable Engine | V6 3.0L |
|---|---|
| Coil Terminal Quantity | 4 |
| Primary Resistance | 0.1-0.12 ohms |
| Secondary Resistance | 2.21-2.71 KΩ |
| Spark Plug Material | Iridium+Nickel |
This kit pairs six ignition coils with iridium-tipped spark plugs intended as a direct replacement for the V6 3.0L Mercedes-Benz engines listed for fitment, including the GLC43 AMG. The coils are bolt-on style with pin terminals and are specified for valve-cover mounting, so installation follows the factory location and torque recommendations. The iridium plugs aim to improve starting, idle stability, and longevity compared with standard nickel plugs, while the coil resistance specs match common factory ranges to maintain consistent spark energy. For a performance-oriented owner, the bundled approach makes it convenient to refresh the entire ignition system at once, which can reduce misfires and keep the engine running smoothly under load. Important limitations: this is an aftermarket replacement rather than factory-brand parts, so fit and finish can vary and precise fit depends on the exact model year and production changes; professional installation is recommended to ensure correct torque and gap. Mileage-dependent wear and diagnostic checks should guide replacing the whole set versus a single failed component.
Best for: Performance-oriented buyers who prioritize consistent high-voltage spark and reliable combustion in the GLC43 AMG and want a single kit to refresh the entire ignition system for spirited driving and tuning support.
Less Ideal for: Drivers seeking exact factory-brand parts or those who only need a single replacement coil and prefer buying individual components as needed.
- Complete set of six coils and matching iridium spark plugs for a full ignition refresh
- Iridium central electrode for longer plug life and more stable idle and starts
- Coil electrical specs listed to match typical factory resistance for reliable spark delivery
- Bolt-on mount and valve-cover location follow factory placement for straightforward replacement
- Aftermarket product so fit or connector differences may require careful verification against the vehicle before installation
- Set includes six units even if only one cylinder is failing which may be unnecessary for some repairs
Verdict A convenient, performance-minded full ignition kit for the Mercedes-Benz V6 3.0L lineup that upgrades plugs to iridium while matching coil electrical specs, but expect the usual fit-checks of an aftermarket replacement.
4. AZ-HAPPYMALL Ignition Coil for Mercedes-Benz (UF-744 / 2709060500)
| Part Interchange Info | 270-906-05-00 |
|---|---|
| Connector Gender | Male |
| Automotive Fit Type | Vehicle Specific Fit |
| Installation Type | Bolt-On |
This AZ-HAPPYMALL ignition coil is a budget-oriented, vehicle-specific replacement intended for several Mercedes-Benz engines that use the UF-744 / 2709060500 part. It installs as a bolt-on unit and connects via a standard male connector, so a basic engine bay repair or mechanic can swap it in without modifications. The listing states the coil follows factory-style fitment and claims improved combustion and fuel efficiency compared with a worn unit, which in practice translates to restored idle smoothness and fewer misfires on affected cylinders. The single-piece supply is convenient when you only need one coil replaced. Limitations include the minimal documentation and the need to confirm exact model-year fitment before buying; this is not a multi-pack for replacing all coils at once. Buyers should also expect to verify compatibility with the vehicle’s ignition control since aftermarket coils can vary slightly in electrical characteristics. For a cost-focused repair on a GLC that uses the UF-744 reference, this coil offers a straightforward, affordable option with typical aftermarket caveats.
Best for: Budget-conscious owners focused on an inexpensive, targeted repair who prioritize low upfront cost and quick bolt-on replacement.
Less Ideal for: Drivers seeking a full-engine refresh or long-term performance tuning who want to replace all coils at once or require manufacturer-specified matching sets.
- Vehicle-specific fitment for Mercedes-Benz models using part 270-906-05-00 makes installation straightforward.
- Bolt-on installation with a standard male connector reduces labor time for a single-coil replacement.
- Sold as a single unit so you only buy what you need for a targeted repair.
- Limited product documentation and fitment guidance require careful model-year confirmation before purchase.
- Single-piece sale means higher per-cylinder cost if multiple coils need replacement.
Verdict A low-cost, vehicle-specific replacement coil that restores cylinder function quickly but requires careful fitment checks and is sold as a single unit.
5. Bosch Ignition Coil (0221604067) – Single
| Brand Name | Bosch |
|---|---|
| Item Type Name | Ignition Coil |
| Model Number | 0221604067 |
| Installation Type | Bolt-On |
| Part Interchange Info | Interchange part. Check compatibility with your vehicle. |
This Bosch ignition coil supplies the high-voltage spark energy a Mercedes-Benz GLC needs for reliable starts and smooth running. It is a direct bolt-on replacement designed for vehicle-specific fitment and installs where the original coil sits above each spark plug. Bosch emphasizes corrosion-resistant electrical connections and materials engineered for temperature and vibration resistance, which translate to steady firing, reduced misfires, and improved cold-start behavior in everyday driving. Typical use is replacement of a failed or degraded coil during routine repairs or when diagnosing engine roughness and check-engine codes. Practical benefits include predictable compatibility with Mercedes-Benz part numbers listed, industry-recognized build quality, and a service life comparable to factory-quality coils. Important limitations are that this is a single coil rather than a multi-pack, so buyers replacing multiple cylinders will need additional units, and compatibility must be verified against the GLC VIN or parts list before purchase.
Best for: A risk-averse mainstream buyer who prioritizes factory-quality replacements and predictable, OEM-like reliability for routine maintenance on a Mercedes-Benz GLC.
Less Ideal for: Drivers looking for a budget bulk option or those who want an all-cylinder kit in one purchase should consider alternatives offering multi-packs or aftermarket value bundles.
- Factory-quality design that meets or exceeds Mercedes-Benz equivalent part numbers
- Corrosion-resistant electrical connections for reliable conductivity over time
- Engineered for temperature and vibration resistance to extend service life
- Bolt-on installation type for straightforward replacement
- Sold as a single coil rather than a multi-pack, requiring multiple purchases for multi-cylinder replacements
- Must confirm exact GLC fitment against VIN or parts list before installing
Verdict A factory-quality single replacement coil that delivers reliable, OEM-like performance for the Mercedes‑Benz GLC but is sold per unit so plan purchases accordingly.
6. LCWRGS Set of 6 Ignition Coil Packs for 3.5L V6 Mercedes-Benz (UF535/UF585 Equivalent)
| Compatible with Vehicle Type | Mercedes Benz 3.5L V6 models |
|---|---|
| Part Interchange Info | IC615, IC665, UF535, UF585, 07C905115 equivalents |
| Connector Gender | Female |
| Automotive Fit Type | Vehicle Specific Fit |
These LCWRGS ignition coil packs replace the factory units on Mercedes-Benz 3.5L V6 engines and are supplied as a complete set of six for full-bank replacement. They are built to match factory fitment and electrical connections so a DIYer or technician can swap them in without modification. The listing highlights conductive copper windings and high-dielectric epoxy for durability and claims improved energy output versus original coils, which in practical terms can reduce misfires, restore smooth idle, and clear ignition-related fault codes. The pack includes part-number cross-references (UF535, UF585 and others) which helps confirm fitment for Mercedes models with the 3.5 V6. Expect straightforward installation and immediate drivability improvements on engines experiencing weak spark. Limitations: these are aftermarket coils so long-term durability can vary versus factory-brand items and you should confirm the exact part number and connector before purchase to avoid fitment errors on certain model years.
Best for: Practical optimizers who prioritize getting reliable factory-quality fit at a lower cost and want a single purchase to replace all coils and restore day-to-day drivability.
Less Ideal for: Buyers seeking factory-brand replacement with guaranteed long-term OEM-backed durability or those who prefer parts sourced directly through a Mercedes-Benz dealer.
- Sold as a full set of six for complete bank replacement, avoiding partial swaps.
- Direct-fit, vehicle-specific design with female connectors for plug-and-play installation.
- Cross-references common Mercedes-Benz part numbers for easier compatibility checks.
- Claims higher energy output than stock coils which can improve misfire-prone engines.
- Aftermarket construction may not match factory-brand longevity in all cases.
- Fitment still requires verifying part numbers and plug style for certain model years.
Verdict A cost-conscious, full-bank replacement that delivers plug-and-play fit and improved ignition performance for Mercedes-Benz 3.5L V6 engines, with the usual durability caveat of aftermarket parts.
7. ECCPP Ignition Coil Pack with Iridium Spark Plugs (set of 4)
| Compatible with Vehicle Type | Mercedes‑Benz SLK250 and C250 1.8L (2012–2015) |
|---|---|
| Part Interchange Info | Replaces A0001502580, C931, UF-658, IC761, GN10552, E1158 |
| Connector Gender | male |
| Installation Type | Bolt-On |
This ECCPP kit bundles four ignition coils and four iridium spark plugs intended as direct replacement parts for Mercedes‑Benz 1.8L models from 2012 to 2015. The coils are bolt‑on replacements that match common factory part numbers and use epoxy potting and rubber contacts to resist heat and electrical leakage. Typical use is straightforward: swap out old, failing coils and plugs to clear misfires, restore smooth idle and improve starting and fuel efficiency. The included iridium plugs let you replace both coils and plugs at once, which is convenient during a tune‑up. Practical benefits include matched components, easy installation for a DIYer with basic tools, and many owners reporting improved drivability after the swap. Limitations are variable long‑term durability reported by some users and occasional unit failures that required rework or replacement; buyers who expect dealer‑level longevity may prefer a factory‑branded unit. Also this kit is specifically for compatible Mercedes‑Benz 1.8L applications and should be checked against your vehicle before purchase.
Best for: Balanced buyers who want a complete, cost‑effective ignition service kit to restore smooth running and fuel economy while preferring the convenience of replacing coils and plugs together.
Less Ideal for: Buyers seeking dealer‑grade, long‑term OEM branded parts or extended factory‑level durability should consider factory‑quality replacements instead.
- Sold as a matched set of four coils plus four iridium spark plugs for a complete ignition service
- Listed as direct replacements for specific Mercedes‑Benz 1.8L factory part numbers
- Epoxy potting and rubber contacts to help resist heat and prevent electrical leakage
- Bolt‑on installation type suitable for DIY replacement with basic tools
- Some users report premature failures or parts separating during removal, indicating inconsistent long‑term durability
Verdict A convenient matched coil‑and‑plug kit that restores drivability for compatible Mercedes‑Benz 1.8L cars but with mixed long‑term durability reports.
Choosing the Right Mercedes-Benz GLC Ignition Coil: Key Factors to Consider
Fitment and Connector Type
Correct fitment ensures the coil mounts securely and the electrical connector seats properly. Mismatched mounting points or connector pinouts can prevent installation or cause intermittent electrical contact.
Paying attention to OEM-style connectors and boot length matters because the coil must reach the spark plug without stressing the plug or surrounding components. A coil that looks similar but uses a different connector type can introduce diagnostic trouble codes or erratic engine behavior.
Electrical Output and Resistance
The coil’s ability to produce a stable high-voltage output affects combustion quality. Specifications such as primary and secondary resistance, and the coil’s rated voltage handling, influence spark intensity and consistency under various loads.
Lower-than-expected output can lead to misfires, while excessive resistance may cause weak spark. Choose coils with electrical specifications that align with the GLC’s ignition control strategy to maintain consistent performance.
Thermal Durability and Materials
Ignition coils operate in a high-temperature environment. Materials and potting compounds that resist heat and oil ingress extend service life and reduce the risk of internal breakdown.
Look for coils with robust housings and proven insulation materials. Heat-resistant designs are especially important if you drive in hot climates or subject the vehicle to sustained high-load conditions, because thermal degradation often precedes electrical failure.
Sealing and Boot Integrity
Seals and boots keep contaminants out of the coil-to-plug interface and maintain proper electrical isolation. Degraded boots can allow moisture or oil to short the spark or corrode connectors.
A well-sealed boot also helps preserve spark energy transfer and prevents arcing. When choosing a coil, consider the quality of boot materials and whether the assembly includes protective features to minimize exposure to engine bay contaminants.
Compatibility With Diagnostic Systems
Modern engines rely on precise ignition timing and feedback for diagnostics. A coil must communicate reliably with the vehicle’s engine management system and not introduce false readings or erratic signals.
Coils that mimic factory electrical characteristics reduce the chance of triggering diagnostic trouble codes. Consider whether the coil will allow normal operation of misfire detection and other onboard monitoring features without requiring calibration.
Installation Ease and Serviceability
Ease of installation affects time and potential for error during replacement. Coils that match factory mounting and connector locations are faster to install and reduce the risk of wiring strain.
Also consider how accessible the coils are on the GLC’s engine and whether additional components must be removed. A design that allows straightforward installation and later service reduces labor and the chance of damage during handling.
FAQ
What are common symptoms of a failing ignition coil on a Mercedes-Benz GLC?
Common symptoms often include rough idle, engine misfires, reduced power, and difficulty starting. You may also notice the check engine light illuminate with misfire-related codes. Symptoms can vary in severity and sometimes appear intermittently.
How can you test an ignition coil before replacing it?
You can check for trouble codes with an OBD-II scanner and observe misfire or ignition-related codes. Basic testing often includes checking primary and secondary resistance with a multimeter and inspecting for visible damage or corrosion. Dynamic testing with a professional ignition tester or oscilloscope gives more conclusive results.
Is an ignition coil replacement something you can do yourself on a GLC?
Many owners can replace coils if they have basic mechanical skills and the right tools, because the job typically involves unplugging the coil, removing fasteners, and installing the new unit. However, access can vary by engine layout, and care is needed to avoid damaging connectors or spark plugs.
Will switching to an aftermarket ignition coil cause engine management issues?
It depends on how closely the aftermarket coil matches factory electrical and connector specifications. Units that mirror OEM characteristics usually integrate without issue, while coils with different electrical behavior can sometimes trigger diagnostic codes or affect misfire detection.
How long do ignition coils typically last on a Mercedes-Benz GLC?
Lifespan varies based on driving conditions, heat exposure, and build quality. Coils can often last many tens of thousands of miles but may fail earlier if exposed to oil contamination, overheating, or repeated high-load operation. Regular inspection helps catch early signs of degradation.
How We Chose the Best Mercedes-Benz GLC Ignition Coil
We prioritized products that match Mercedes-Benz GLC-specific fitment and electrical requirements, focusing on coils designed to meet factory mounting, connector type, and ignition timing needs. Key evaluation criteria included electrical output consistency under load, connector and boot compatibility, heat tolerance and materials, and expected service life based on construction.We also assessed installation considerations such as form factor, ease of access for typical GLC engine layouts, and whether the coil integrates with the vehicle's diagnostic and ignition control systems. Units that required engine modifications or had unclear fitment documentation were excluded. We did not consider general-purpose coils that lack GLC-specific fit data. The result is a set of options that balance fit, performance, longevity, and installation practicality for Mercedes-Benz GLC owners.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Mercedes-Benz GLC ignition coil, prioritize correct fitment and electrical compatibility with the vehicle’s ignition system. Thermal durability and good sealing help ensure long service life, while OEM-style connectors and specifications reduce the chance of diagnostic or performance issues.Balance installation ease with the coil’s materials and electrical specs. Focusing on those factors will help you select a coil that restores reliable starting, smooth idling, and consistent engine performance.
Explore More:
- Check out all Mercedes-Benz GLC parts & accessories
- Explore Ignition Coils Maintenance & Repair Guides
- Explore Engine
- Browse all Auto Parts
