Power electrical equipment Mercedes C-Class (W202)
Battery — removal and installation The battery is located on the right side under the boot floor. Attention! Some standard car radios are coded. The anti-theft coding prevents incompetent commissioning of...
Maintenance-free batteries Mercedes C-Class vehicles are equipped as standard with a low-maintenance battery. This battery does not need to be topped up with distilled water as before, but you...
Checking the battery There are two options for checking the battery. Depending on them, the use of different test instruments will be required. Electrolyte Density Check In combination with...
Battery self-discharge Depending on the vehicle's equipment, the natural discharging of the battery is aided by the consumption of current by various control systems, even when the engine is...
Charging the battery Items marked with + refer only to the maintenance-free battery, which is installed as standard. Pay attention to these instructions. If an additional battery has been...
Storage of the battery Batteries that have not been used for a long time discharge themselves and, in addition, their plates can be sulphated. If these batteries are charged with a quick...
Diagnostics of battery malfunctions Battery troubleshooting CAUSE SOLUTION Too low electrolyte level Overcharge. Evaporation (especially in summer) Top up with distilled water to the prescribed level (for...
Generator — Description and Safety The engines of Mercedes C-class cars work with a three-phase alternator. Depending on the model and equipment, generators of various capacities are installed. The...
Generator — removal and installation Removing 1. Terminal 30 wire (B+); 2. Terminal 61 wire (D+); 3. Bolts; 4. Contact protection; 5. Generator 1. Disconnect the ground wire from the battery terminal (–)....
Checking the alternator charging voltage 1. Connect a voltmeter between the positive and negative battery terminals. 2. Start the engine. During startup, the voltage may drop to 9.5 V. 3. With an engine speed...
Diagnostics of malfunctions of the generator Diagnostics of malfunctions of the generator CAUSE SOLUTION When the ignition is on, the battery charge indicator does not light up The battery is empty Charge the...
Starter — general description The internal combustion engine drives a small electric motor called a starter. In order to be able to start the engine at all, the starter must be accelerated to a speed...
Starter — removal and installation 1. Terminal 30 wire; 2. Terminal 50 wire; 3. Bolts; 4, 6. Holder; 5. Holder (only for petrol engines); 7. Spring clip / holder; M1. Starter Removing 1. Disconnect the...
Starter Troubleshooting If the starter does not turn, then, first of all, check whether there is a voltage on terminal 50 of the traction relay necessary for retracting - at least 8V. If the...
Traction relay — removal, inspection and installation If the traction relay malfunctions, the gear in the starter is not attracted to the gear rim of the flywheel. Because of this, the starter cannot turn the engine shaft....
The main malfunctions of the starter and generator The most common malfunction in electric motors is insulation breakdown in the windings. Let's say you put the car in the parking lot, and turn off "wipers" forgot. Three...