Mercedes-Benz 260 E 124 1988 Owner's Manual page 88

Battery
Check electrolyte level in each cell
approximately every four weeks, and
more frequently during the summer
and in hot climates.
Refill battery with distilled or tap water.
Do not use metal funnels or push
through the overfill-protection dia­
phragms in the filler holes.
The battery is completely filled when
the water stops draining through the
overfill-protection diaphragm.
To check the battery charge with a
hydrometer, push its tip through the
overfill-protection diaphragm and take
an electrolyte sample.
86
Coat battery terminal clamps with
acid-proof grease. Keep battery clean
and dry.
The service life of the battery is also
dependent on its condition of charge.
It must always be sufficiently charged
for the battery to last an optimum
length of time.
Therefore, we recommend that you
have the battery charge checked fre­
quently if you use the vehicle mostly
for short distance trips, or if it is not
used for long periods of time.
Only charge a battery with a battery
charger after it has been disconnected
from the vehicle electrical circuit.
W arning!
Battery fluid contains sulfuric acid.
Do not allow this fluid to come in
contact with eyes, skin, or clothing.
In case it does, immediately flush
affected area with water and seek
medical help.
A battery will also produce hydro­
gen gas, which is flammable and
explosive. Keep flames or sparks
away from battery, i.e. improper
connection of jum per cables,
smoking, etc..
While the engine is running the bat­
tery terminal clamps must not be
loosened or detached as otherwise
the alternator and other electronic
units would be damaged.
Only tow vehicle with the battery
connected.