Ignition Coil and Iridium Spark Plugs for Mercedes Benz M-Class (1998-2003) 3.2L
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Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 1998-2003 Mercedes Benz M-Class
What it Does: Restores factory twin-spark ignition efficiency, eliminates multi-cylinder misfires, and stabilizes idle across all operating temperatures by replacing aged coil packs and worn dual-spark plugs.
The Stock M-Class Ignition Degradation
The Mercedes-Benz M112 V6 utilizes a dual-spark plug per cylinder configuration (12 plugs total fired by 6 coil packs) with sequential, staggered phase firing. Over time, underhood thermal cycling causes dielectric breakdown within the original epoxy coil housings and degrades internal secondary copper windings. Simultaneously, factory spark plug gaps erode, elevating secondary resistance and forcing higher ionization voltages. This excessive electrical load induces intermittent primary circuit failure, unburned hydrocarbon buildup, rough idle transitions, and recurring P0300 through P0306 DTC misfire codes.
The Engineering Solution
This comprehensive ignition service kit features high-grade magnetic copper primary and secondary windings encased in reinforced, heat-resistant thermoplastic housings designed to withstand prolonged engine bay heat soak. The paired fine-wire iridium spark plugs lower required breakdown voltage, provide stable spark kernel growth, and resist carbon fouling under variable combustion loads. High-dielectric silicone boots and direct-fit blade connectors ensure zero voltage arc-over and immediate plug-and-play communication with the Bosch ME ECU.
Technical Specifications
| Fitment | 1998-2003 Mercedes Benz M-Class |
| Engine / Chassis | 3.2L M112 V6 / W163 |
| Stock Output | 215 hp / 233 lb-ft (Approx) |
| Part Number | UF359, UF-359, A0001587303, A0001587803, PFR5B-11, E539A |
Compatibility
- 1998 Mercedes-Benz ML320 (3.2L V6 M112)
- 1999 Mercedes-Benz ML320 (3.2L V6 M112)
- 2000 Mercedes-Benz ML320 (3.2L V6 M112)
- 2001 Mercedes-Benz ML320 (3.2L V6 M112)
- 2002 Mercedes-Benz ML320 (3.2L V6 M112)
- 2003 Mercedes-Benz ML320 (3.2L V6 M112)
The Mercedes Benz Precision Standard
Engineered strictly for European OBD-II diagnostics compliance, this ignition system delivers precise spark advance timing, zero false misfire counts, and eliminates Check Engine lights without requiring ECU recalibration.
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