About the Mantis MTP-1029 AMG M139 Performance Ignition Coils.
The world's most powerful production four-cylinder deserves better than tired coils.
The M139 makes 421PS from two litres as standard - over 200PS per litre - and mapped cars go far beyond. Cylinder pressures that high expose any weakness in the ignition system, and until now the only coil you could buy was genuine Mercedes at £75-90 each.
The Mantis MTP-1029 is a direct replacement engineered around a neodymium core delivering 12% more spark energy than the standard OE coil - built for the hardest-working production four-cylinder there is.
Signs your 45 S needs new coils
> Misfires or breakup under full boost
> Hesitation on tip-in, rough idle
> Misfire codes after a map
> Down on power against the clock
Fits A45 / A45 S (W177), CLA45 / 45 S (C118), GLA45 / 45 S (H247) • 4 coils per engine • 2-year warranty • Every unit tested
