Mercedes-Benz SL SERIES Operator's Manual page 560

Battery (vehicle)
558
The jump-starting connection point is in the
engine compartment.
If the indicator/warning lamps do not light up
at low temperatures, it is very likely that the
discharged battery has frozen. In this case,
you may neither charge the battery nor jump-
start the vehicle. The service life of a thawed-
out battery may be shorter. The starting char-
acteristics can be impaired, particularly at
low temperatures. Have the thawed-out bat-
tery checked at a qualified specialist work-
shop.
Read the battery charger's operating instruc-
tions before charging the battery.
Open the hood.
X
Connect the battery charger to the positive
X
terminal and ground point in the same
order as when connecting the donor bat-
tery in the jump-starting procedure
( page 559).
Y