Power electrical devices Mercedes A-Class (W168)

Battery — Removal and Installation
The battery is located in the front passenger footwell under a cover, next to the main fuse box. Caution! When the battery is disconnected, data is deleted from the...

Battery — Check
Before the winter season, the battery must be checked. At low temperatures, when the engine is started, the voltage of a relatively weakly charged battery drops sharply....

Battery — charging
Precautionary measures Do not disconnect the battery while the engine is running. Do not short-circuit the battery, i.e. do not connect the positive (+) and negative (-)...

Checking the generator voltage
1. Connect the voltmeter to the battery terminals. 2. Start the engine. When starting, the voltage may drop to 8 volts (at an ambient temperature of +20°C). 3. Increase...

Generator — removal and installation
Depending on the model and configuration of the vehicle, generators of different capacities can be installed. For example, generators installed on cars with diesel...

Starter — removal and installation
To start an internal combustion engine, a small electric motor, a starter, is needed. In order for the engine to start at all, the starter must spin it up to at least...

Traction relay — removal, installation and testing
If traction relay 1 is faulty, starter pinion 2 is not attracted to the flywheel ring gear, and as a result, the starter cannot turn the engine crankshaft (see...

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