Jump-Starting - Mercedes-Benz R-Class Owner's Manual

Jump-starting

If your vehicle's battery is discharged, the
engine can be jump-started from another
vehicle or from an external battery using jump
leads.
Observe the following points:
Jump-starting may only be performed when
R
the engine and catalytic converter are cold.
Do not start the engine if the battery is fro-
R
zen. Let the battery thaw first.
Jump-starting may only be performed from
R
batteries with a nominal voltage of 12 V.
Only use jump leads which are protected
R
against polarity reversal and which have a
sufficient cross-section and insulated ter-
minal clamps.
i
Jump leads which are protected against
polarity reversal and further information
about jump-starting can be obtained from
any Mercedes-Benz Service Centre.
!
Avoid repeated and lengthy starting
attempts.
Never start the vehicle using a rapid battery
charger.
G Risk of injury
There is a risk of acid burns when jump-
starting a vehicle due to the gases which
escape from the battery. Do not lean over
the battery while the engine is being jump-
started.
G Risk of explosion
Gases escaping from the battery during
jump-starting may cause minor explosions.
Avoid creating sparks. Keep naked flames
away from the battery, and do not smoke.
Comply with safety precautions and take
protective measures when handling batter-
ies. You will find these under "Battery" in
the index.
Make sure that the two vehicles do not
X
touch.
Depress the parking brake firmly.
X
Move the selector lever to P.
X
Switch off all electrical consumers.
X
Practical advice
Jump-starting
Earth point on your vehicle
1
2 Positive terminal on your vehicle
Negative terminal of donor battery
3
Positive terminal of donor battery
4
Connect positive terminal 2
X
cle to positive terminal 4 of the donor
battery using the jump lead, beginning with
your own battery.
Start the engine of the donor vehicle and
X
run it at idling speed.
Connect negative terminal 3
X
battery to the earth point 1
using the jump lead, connecting the jump
lead to the donor battery first.
Start the engine.
X
on your vehi-
of the donor
of your vehicle
Z
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