Mercedes Coupes/Sedans/Wagons 1974-1984 Repair Guide



All Mercedes-Benz passenger cars are equipped with 12-volt Bosch electric starters of various rated outputs. The starter motor is actually nothing but a simple series-wound electric motor of high torque output, fitted with a drive pinion and a device to mesh the pinion with the flywheel ring gear. The carrier, which is connected to the pinion through the overrunning clutch, runs in splines machined in the armature shaft. When the armature rotates, these splines force the pinion into mesh. When the engine starts, the overrunning (one-way) clutch releases the pinion and the unit disengages. The starter is actuated and the pinion engaged by an electric solenoid mounted on top of the starter motor.

When removing the starter, note the exact position of all wires and washers, since they should be installed in their original locations. On some models it may be necessary to also position the front wheels to the left or right to provide working clearance.


See Figures 1, 2 and 3

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Fig. Fig. 1: To remove the starter, disengage its electrical connections ...

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Fig. Fig. 2: ... then unfasten the retaining bolts

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Fig. Fig. 3: Remove the starter motor from the engine

  1. Remove all wires from the starter and tag them as to location.
  3. Disconnect the battery cable.
  5. Unbolt the starter from the bell housing and remove the starter from underneath the car.
  7. Installation is the reverse of removal. Be sure to replace all wires and washers in their original locations.