Mercedes-Benz GLE COUPE Operator's Manual page 316

Jump-starting
314
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
G
WARNING
During charging and jump-starting, explosive gases can escape from the battery. There is a risk
of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over a battery.
G
WARNING
During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks
are created, the hydrogen gas can ignite. There is a risk of an explosion.
Make sure that the positive terminal of a connected battery does not come into contact with
R
vehicle parts.
Never place metal objects or tools on a battery.
R
It is important that you observe the described order of the battery terminals when connecting
R
and disconnecting a battery.
When jump-starting, make sure that the battery poles with identical polarity are connected.
R
It is particularly important to observe the described order when connecting and disconnecting
R
the jumper cables.
Never connect or disconnect the battery terminals while the engine is running.
R
G
WARNING
A discharged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is a risk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
!
Vehicles with a gasoline engine: avoid repeated and lengthy starting attempts. Otherwise, the
catalytic converter could be damaged by non-combusted fuel.
If the indicator/warning lamps do not light up at low temperatures, it is very likely that the dis-
charged battery has frozen. In this case you may neither jump-start the vehicle nor charge the
battery. The service life of a thawed-out battery may be shorter. The starting characteristics can be
impaired, particularly at low temperatures. Have the thawed-out battery checked at a qualified
specialist workshop.
Do not start the vehicle using a rapid charging device. If your vehicle's battery is discharged, the
engine can be jump-started from another vehicle or from a second battery using jumper cables.
Observe the following points:
The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-
R
start the vehicle using a second battery or a jump-starting device.
Vehicles with a gasoline engine: only jump-start the vehicle when the engine and exhaust
R
system are cold.
Do not start the engine if the battery is frozen. Let the battery thaw first.
R
Only jump-start from batteries with a 12 V voltage rating.
R
Only use jumper cables which have a sufficient cross-section and insulated terminal clamps.
R