Ignition Coil Resistance Check

Turn ignition switch "OFF". Remove coil wires. Using an ohmmeter set at the low scale, attach leads to ignition coil primary terminals 1 and 15 (wires removed). See Fig 1. Take primary resistance reading.

Fig 1: Ohmmeter Hookup for Ignition Coil Primary and Secondary Resistance Checks
Courtesy of NOT AVAILABLE

Diagram also shows ohmmeter hookup for ballast resistor check.
On Mercedes-Benz models, the coil has a pressure relief plug located on top of the coil. Make sure the plug has not popped out. If it has popped out, replace coil.
Set ohmmeter to x1000 scale. Connect ohmmeter leads to negative terminal 1 and coil tower terminal 4 (high tension). Take secondary resistance reading.

If either the primary or the secondary reading was not within specifications, replace coil.

IGNITION COIL RESISTANCE SPECIFICATION