48 V On-Board Electrical System, Basic Function - GF54.10-P-1015A
WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.
Model all (CAR)
with code B01 (48V technology)
General
The 48 V on-board electrical system supplies all 48 V consumer (consumers with high energy requirement) with electrical energy. It also provides the electrical energy for starting the combustion engine with the starter-alternator. When the combustion engine is running, the starter-alternator generates the electrical energy for charging the 48 V battery. Depending on the version, the starter-alternator is either driven via a belt or integrated into the drivetrain.
The 48 V on-board electrical system supplies the 12 V on-board electrical system with electrical energy from the 48 V battery via the DC/DC converter. No 12 V alternator is installed.
Example illustration