HG Motorsport ignition coils for Mercedes-Benz M112.9/M113.9, M155.9, M266.9

Technical optimisation for maximum performance

HG Motorsport high-performance ignition coils

Maximum spark energy and thermal stability for modern high-performance engines. In modern vehicles, particularly those with uprated engines, original ignition coils quickly reach their limits. Misfires, uneven combustion and thermal overload can be the result. HG Motorsport high-performance ignition coils have been specifically developed to overcome these challenges. They provide increased spark energy, improved thermal stability and consistently reliable performance, even under the most demanding conditions.

Technical features of the HG Motorsport ignition coils

• Optimised primary and secondary windings: additional windings and high-quality copper wire provide improved energy transfer and consistently high ignition voltage.
• Increased spark energy (+10% compared with OE): perfect spark plug supply throughout the entire dwell period, ideal for high-performance engines.
• Consistent energy output under high load: particularly suitable for turbocharged and supercharged engines that require stable ignition voltage over extended periods.
• Extended service life: high-quality insulation materials and optimised windings minimise thermal loads and protect against internal short circuits.
• Thermal resilience: continuous operation up to 120°C and stable operation up to 140°C without loss of performance.
• Optimised spark formation: stable ignition even at high boost pressures and with richer mixtures, significantly improving combustion efficiency.

The diagram shows the superior spark energy of the HG Motorsport ignition coils compared with standard components:

• Up to 1.5 ms: both coil types deliver comparable energy.
• From 2.0 ms: the energy of standard ignition coils drops significantly, while the HG Motorsport ignition coils continue to deliver consistently high values.
• At 3.0 ms: the HG Motorsport ignition coils deliver almost 25% more energy, which is decisive at high engine speeds and in uprated engines.

Even at a temperature of 140°C, the spark energy of the HG Motorsport ignition coils remains stable at 70 mJ, while OE coils have already failed or reached critical values.

Ideal applications

• High-performance engines: optimum ignition even under extreme loads.
• Motorsport and trackdays: stability and consistent energy during continuous operation.
• Daily drivers with increased power: improved efficiency and ignition stability in everyday use.
• Replacement for OEM ignition coils: greater reliability and longer service life.

Winding structure and operation

The ignition coils use an optimised primary and secondary coil structure. The primary winding generates a strong magnetic field which, as it collapses, induces a high voltage in the secondary winding. The increased number of windings and improved insulation ensure consistent spark energy even at high engine speeds and peak loads.

Thermal testing and long-term results

1. Continuous thermal load
   Test setup: continuous operation at 120°C with simulated load changes over 100 hours.
   Result: no reduction in performance and no thermal degradation of the HG Motorsport ignition coils.
   Comparison: OE ignition coils lost approximately 25% of their energy after 50 hours, followed by initial material changes.
2. Additional test at 140°C
   HG Motorsport: stable operation for 8 hours without failures.
   OE ignition coils: performance drop of up to 40% after 4 hours, followed by thermal failures.

Summary of laboratory data

• Maximum spark energy: HG Motorsport 120 mJ; OE ignition coil 90 mJ.
• Continuous load at 120°C: HG Motorsport > 100 hours; OE ignition coil 50 hours.
• Operation at 140°C: HG Motorsport stable for up to 8 hours; OE ignition coil performance drop after 4 hours.
• Insulation resistance (500 V): HG Motorsport > 20 MΩ; OE ignition coil approx. 10 MΩ.

OE numbers replaced by the ignition coil: A0001587803, A0001587303, 5098138AA, 51259190016.

Suitable for: Mercedes-Benz A-Class II (W169), Mercedes-Benz B-Class I (W245), Mercedes-Benz C-Class I (W202) / II (W203), Mercedes-Benz E-Class I (W210) / II (W210/S210) / II (W211) / III (W211/S211), Mercedes-Benz G-Class I (W463), Mercedes-Benz M-Class I (W163), Mercedes-Benz S-Class V (W220), Mercedes-Benz Vito II (W639).

Manufacturer’s vehicle data

• HG Hochleistungs Zündspulen Mercedes A/B/C/E/G/M/S Vito M112.9 M113.9, M155.9, M266.9 Motoren

Original product name by HG Motorsport (»z.B.« = e.g.). Please check model, year and engine of your vehicle before ordering; if in doubt, contact us and we will check for you.