Pick-Up Coil Resistance Check

Make sure ignition switch is "OFF". Disconnect pick-up coil connector (Green cable) from control module. Set ohmmeter to x1000 scale. Attach ohmmeter leads to center pin (terminal 7) and to larger, outer, circular pin (terminal 3) of Green cable.
If resistance readings are not to specifications, remove connector from distributor, and take reading at pick-up coil pins at distributor. If readings are now correct, replace wiring harness. If readings are still not to specifications, replace pick-up coil.

Fig 1: Ohmmeter Hookups for Pick-Up Coil Resistance & Short Checks

PICK-UP COIL RESISTANCE SPECIFICATIONS

Application	Ohms
Mercedes-Benz	500-700