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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz C-Class (from 1993 to 2000, the year of issue)

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Mercedes-Benz C-class
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Troubleshooting Starter



If the starter does not turn, then first check whether there is a terminal 50 of the traction relay required to draw power - no less than 8V. If the specified voltage is supplied, you should check on the wiring lines that belong to the starter circuit. Retractable whether the starter in the presence of a full battery voltage can be checked as follows:

- Does not include any transmission, turn on the ignition;
- Shunt wire (cross-section of at least 4 mm 2) terminals 30 and 50 on the starter. See also wiring diagram Electrical - starter, alternator, battery (DB 111 HFM / PMS).

If the starter is started normally, the fault lies in the wire to the starter. In this case, check the starter in the removed state.

Test condition: the need to tighten the connection failure, and they should not be oxidized.

CAUSE
REMEDY
Starter does not rotate during actuation of the ignition starter switch
The battery is discharged Charge the battery.
A broken line 50, which goes to the ignition starter switch, starter switch is faulty Repair the open, replace faulty parts.
Broken wire or connection; discharged battery Check battery cables and connections, measure the battery voltage, charge it if necessary.
Inadequate flow of current due to frayed or oxidized compounds Clean the poles and battery terminals.
There is no voltage at terminal 50 (the traction relay) Restore the fused connection between the battery, starter and the vehicle body.
Starter turns too slowly and the engine will not start
The battery is discharged Charge the battery.
In the winter there is no engine power or multigrade oil Fill multigrade oil.
Inadequate flow of current due to loose or oxidized compounds Clean poles and terminals of the battery and clean the connections on the starter, tighten the connection.
The carbon brushes are not adjacent to the collector terminals in their contact surfaces are worn, torn, oily or contaminated Check, clean or replace the carbon brushes, make sure the contact surfaces.
Insufficient gap between the carbon brushes and the collector Replace carbon brushes and clean the contact surface of the carbon brushes.
Collector scratched or burned and dirty Grind collector or replace an anchor.
At terminal 50 there is no voltage (at least 8) Check the ignition switch and the starter or the traction relay.
Faulty magnetic switch Replace magnetic switch.
Starter runs, and retracts the motor shaft does not rotate or rotates in jerks
Defective pinion gear Replace a gear transmission.
Gear contaminated Clean the gear.
Defective ring gear on the flywheel Modify the ring gear, if necessary, replace the flywheel.
It does not work pinion gear
Dirty or faulty pinion gear or a steep thread Clear a gear transmission, replace it if necessary.
Faulty magnetic switch Replace magnetic switch.
Loose or broken return spring Restore the return spring.
The starter continues to run after the ignition has been turned off
Hangs traction relay, not disabled Immediately turn off the ignition, replace the magnetic switch.
Not turned off the ignition key switch and devices Immediately disconnect the wires from the battery, replace the ignition key switch and devices




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