Location of the battery (G1): In the trunk, in the spare wheel well, on the right
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 a special compartment on the right side of the vehicle's trunk.
A starter is used to start the engine. The starter switch is an integral part of the ignition switch and when turned on, it excites the traction relay installed on the starter.
The charging control lamp built into the instrument panel indicates that the electrical equipment is working properly as long as the battery charge is normal.
Material taken from a web resource [MERCEDESMAN.ru]