Spark Plug: Description and Operation

GF15.10-P-2000AMG Component Description For Spark Plugs
ENGINE 156.980 in MODEL 164, 251 up to Model Year 8
ENGINE 156.982 in MODEL 209
ENGINE 156.983 in MODEL 211, 219
ENGINE 156.984 in MODEL 216, 221 up to Model Year 8





Location

R4 Spark plugs
T1/8 Ignition coil cylinder 8

On each cylinder, a spark plug is inserted from the top of the cylinder head to centrally in the combustion chamber.

Task
The spark plugs ignite the suctioned and compressed fuel-air mixture due to arcing between the electrodes.

Function
The ignition voltage flows from the ignition lines of the directly plugged in ignition coils to the spark plugs and causes arcing in the air gap between the central electrode and ground electrode.

All the spark plug characteristics are defined by the type symbols provided by the manufacturer (e.g. heat rating, seat shape, thread, width across flats, electrode material, spark position).