Mercedes-Benz Body & Equipment Guideline for Metris - BM 447, Version November 27, 2015.
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9.9 Automatic start/stop system
9 Electrical system
9.9
Automatic start/stop system
The purpose of the automatic start/stop system is
to reduce the emission levels. If the automatic start/
stop system is used, an enhanced on-board electrical
system is used for stabilizing the on-board electrical
system voltage. This includes an additional backup
battery and a modified fuse box.
To avoid dropping below the defined charge capacity of
the battery, the system is automatically deactivated if
the power consumption exceeds 140 A or if the charge
state of the battery is low.