Charging and starting systems Mercedes C-Class (W203)

General description of charging and starting systems
All vehicles covered in this guide have a 12-volt electrical system. The ground connection is via the negative battery terminal. The battery is located in the trunk. A...

Battery — Basic Information and Purchase
Please also refer to Section Checking the condition, adjusting and replacing windshield wiper blades . The installed 12V battery consists of six cans containing positive...

Checking and charging the battery
Low maintenance battery 1. If the annual mileage of the car is small, the density of the electrolyte should be measured every three months to check the battery charge....

Replacing the battery
Do not loosen or remove battery cables while the engine is running. Otherwise, electronic components may be damaged (for example, a generator). Attention! Disconnecting...

Storage of the battery
1. If the car has not been used for more than two months, the battery must be removed and charged. The optimal storage temperature for the battery is from 0 to +27°C. At...

Charging system — general information and safety precautions
The vehicle is equipped with an alternator. When installing additional electrical equipment, make sure that the alternator has sufficient power to power this equipment....

Checking the charging system
1. If you have detected a fault in the charging system, a faulty generator may not be the only cause. Perform the following checks: a) Inspect the drive belt to ensure...

Generator — removal, inspection and installation
The car has a three-phase alternating current generator. Depending on the model and equipment, generators of different power can be installed. Caution! If electrical...

Removal and installation the voltage regulator and replacing the brushes
Petrol engines 111, 112 Removal 1. Remove the generator, refer to the relevant section. 2. Unscrew the nuts on the terminals. 3. Unscrew the screws (1) and remove the...

Engine Starting System — General Information and Precautions
General information The sole purpose of the engine starting system is to ensure that the engine rotates at a speed sufficient to start it. The starting system consists...

Removal and installation the starter
To start an internal combustion engine, an electric motor called a starter is needed. To start the car engine, it must be spun up to a speed of at least 300 rpm. This...

Removal and installation the starter traction relay
Removal 1. Remove the starter, refer to the relevant section. 2. Clamp the starter in a clamp. Wrap the clamping jaws with a rag for protection. 3. Loosen the nut and...

Checking the engine starting system
Wiring diagram of the starter (2) and traction relay (1) Before performing the test, make sure the battery is fully charged and the anti-theft system is not activated....

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190 (W201) (1982-1993)