Mercedes-Benz Metris 2021 Operating Instructions Manual page 194

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192 Breakdown assistance
Immediately rinse battery acid off thor‐
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oughly with plenty of clean water and
seek medical attention immediately.
Starting assistance
* NOTE Damage caused by numerous or
extended attempts to start the engine
Numerous or extended attempts to start the
engine may damage the catalytic converter
due to non-combusted fuel.
Avoid numerous and extended attempts
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to start the engine.
Do not use a rapid charging device to start the
vehicle. If your vehicle's battery is discharged,
the engine can be jump-started from another
vehicle or from a donor battery using jumper
cables. For this purpose, the vehicle has a jump-
start connection point in the engine compart‐
ment.
When jump-starting, observe the following points:
The battery is not accessible in all vehicles. If
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the other vehicle's battery is not accessible,
starting assistance is to be provided using a
donor battery or a starting assistance device.
You may only jump-start the vehicle when the
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engine and exhaust system are cold.
Do not start the engine if the battery is fro‐
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zen. Let the battery thaw first.
Starting assistance may only be provided
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using batteries with a nominal voltage of 12 V.
Only use jumper cables that have a sufficient
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cross-section and insulated terminal clamps.
If the battery is fully discharged, attach the
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donor battery for a few minutes before
attempting to start. This charges the dis‐
charged battery a little.
Make sure that the two vehicles do not touch.
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Jumper cables and further information regarding
starting assistance can be obtained at any quali‐
fied specialist workshop.
Ensure the following before connecting the
jumper cables:
The jumper cables are not damaged.
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Parts of the terminal clamps which are not
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insulated do not come into contact with other
metal parts while the jumper cables are con‐
nected to the battery.
The jumper cables do not touch moving parts
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when the engine is started and while it is run‐
ning, such as the V-belt pulley or the fan.
Apply the parking brake.
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Shift the transmission to position j.
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Switch off all electrical consumers, e.g. audio
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device, blower.
Switch off the ignition immediately and
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remove the key.
Open the hood (
page 176).
/
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Connecting and disconnecting the jumper
cables
Example: jump-start connection point
Push contact protection cover
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jump-start connection point towards the rear
of the vehicle against the spring pressure as
far as it will go.
The jump-start connection point is visible.
1
of the

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