Ignition Coil and Iridium Spark Plugs for Mercedes Benz SLK-Class (2005-2011) 3.5L
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Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2005-2011 Mercedes-Benz SLK-Class
What it Does: Restores factory ignition performance, eliminates cylinder misfires, and stabilizes engine idle across the entire RPM band on M272-equipped vehicles.
The Stock SLK-Class Thermal Degradation Issue
The compact engine bay of the R171 chassis subjects the M272 V6 ignition components to extreme thermal cycles. Over time, factory coil boots harden and develop micro-fissures, allowing secondary voltage to leak to ground rather than jumping the plug gap. Simultaneously, aged spark plug electrodes experience gap erosion and carbon fouling, elevating the required firing voltage and overtaxing the internal primary windings of the coils. This degradation leads to hesitation under load, erratic idle, and stored P0300-series misfire codes.
The Engineering Solution
This comprehensive service kit pairs six high-dielectric coil-on-plug assemblies with six fine-wire iridium spark plugs. The ignition coils feature high-conductivity copper primary and secondary windings encased in heat-resistant epoxy housings to resist dielectric breakdown under sustained thermal stress. The accompanying iridium spark plugs utilize laser-welded fine-wire center electrodes that require lower strike voltages while resisting gap erosion, ensuring crisp flame propagation, rapid cold-start ignition, and consistent combustion efficiency.
Technical Specifications
| Fitment | 2005-2011 Mercedes-Benz SLK-Class (SLK350) |
| Engine / Chassis | 3.5L M272 V6 / R171 |
| Stock Output | 268-301 hp / 258-265 lb-ft (Approx) |
| Part Number | 0001501980, 0001502680, UF535, 0001502780, 2729060060 |
Compatibility
- 2005-2011 Mercedes-Benz SLK-Class (SLK350 3.5L V6 - R171)
- Replaces OEM / Interchange Numbers: 0001501980, 0001502680, 0001502780, 2729060060, UF535, UF-535, 19005267, 68011844AA, 52-2103, E1035, 07C905, 07C905115
The Mercedes-Benz Precision Standard
Engineered to exact German OE specifications, this direct-fit ignition kit ensures precise signal communication with the Bosch ME engine management system, preventing phantom check engine lights and maintaining factory emission compliance.
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