Mercedes-Benz Body & Equipment Guideline for Metris - BM 447, Version November 27, 2015.
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Please observe the revision notes compared to 09/18/2015 ! Only print out complete sections of the current version!
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9.3 Battery
9 Electrical system
Retrofitting an additional battery
An additional battery may only be installed in the left
seat base.
An additional battery may only be connected to the
vehicle on-board electrical system via a suitable cutoff
relay and using an appropriate electrical fuse.
The additional battery may only be used to power
defined auxiliary consumers such as a stationary
heater, loading aids or electrical equipment in motor-
homes (refrigerator etc.).
Only the same type of battery must be used for main
and additional batteries.
An AGM battery must always be used on vehicles with
an automatic start/stop system.
Location of additional battery
1
Additional battery
Arrow Direction of travel
Other additional batteries
!
Note
If the vehicle is already equipped with an additional
battery, no further additional batteries may be
connected in parallel without a charging current
limiter. This can be realized through supplementary
electronics. A maximum charging current for both
additional batteries of 40 A must be ensured by the
upfitter. If this is not the case, the basic vehicle may
be damaged.
A positive total charge balance is to be assured through
selection of a suitable alternator.