Charging and starting systems Mercedes C-Class (W203)
General description of charge and launch systems All vehicles covered in this manual have a 12V electrical system. The ground connection is through the negative battery terminal. The battery is in the trunk. The...
Battery — Basics and Purchasing See also Section Checking the condition, adjusting and replacing the wiper blades . The installed 12V battery consists of six jars containing positive and negative...
Checking and charging the battery Low maintenance battery 1. If the annual mileage of the car is low, the density of the electrolyte should be measured every three months to check the battery charge. 2....
Replacing the battery Do not loosen or remove battery cables while the engine is running. Otherwise, electronic components may be damaged (e.g. generator). Attention! When the battery is...
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 optimum battery storage temperature is between 0 and +27°C. At...
Charging system — general information and safety measures The vehicle has an alternator. When installing additional electrical equipment, make sure that the generator has enough power to power this equipment. The generator is...
Checking the charging system 1. If you find a malfunction in the charging system, a generator malfunction cannot be the only reason. Perform the following checks: a) Inspect the drive belt to make...
Generator — removal, check and installation The vehicle has a three-phase alternator. Depending on the model and equipment, generators of various capacities can be installed. Attention! If electrical appliances...
Removal and installation of a starter To start an internal combustion engine, an electric motor, called a starter, is needed. In order for the car engine to work, it must be revved up to a speed of at least...
Checking the engine start system Starter wiring diagram (2) and traction relay (1) Before testing, make sure the battery is fully charged and the anti-theft system is not activated. 1. If an automatic...