Mercedes-Benz 2012 B Class - Manual (Page 292)

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:
R
The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible,
jump-start the vehicle using a second battery or a jump-starting device.
R
You may only jump-start the vehicle when the engine and exhaust system are cold.
R
Do not start the engine if the battery is frozen. Let the battery thaw first.
R
Jump-starting may only be performed from batteries with a nominal voltage of 12 V.
R
Only use jumper cables which have a sufficient cross-section and insulated terminal clamps.
R
If the battery is fully discharged, leave the battery that is being used to jump-start connected
for a few minutes before attempting to start. This charges the battery slightly.
R
Make sure that the two vehicles do not touch.
Make sure that:
R
the jumper cables are not damaged.
R
bare parts of the terminal clamp do not come into contact with other metal parts while the
jumper cables are connected to the battery.
R
the jumper cables cannot come into contact with parts which can move when the engine
is running, such as the V-belt pulley or the fan.
X Secure the vehicle by applying the electric parking brake.
X Shift the transmission to position P.
X Turn the SmartKey to position 0 in the ignition lock and remove it.
X Switch off all electrical consumers (e.g. radio, blower, etc.).
X Open the hood ( Y page 266).
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Jump-starting
Breakdown assistance