Mercedes-Benz A Series 2015 Owner's Manual page 353

Towing away and tow-starting
350
Start the engine of the donor vehicle and run it at idling speed.
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Connect negative terminal ? of donor battery B to earth point A of your vehicle using the
X
jump lead, connecting the jump lead to donor battery B first.
If the battery is fully discharged, leave the battery that is being used to jump-start connected
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for a few minutes before attempting to start. This charges the empty battery a little.
Start the engine.
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Before disconnecting the jump leads, let the engines run for several minutes.
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First, remove the jump leads from earth point A and negative terminal ?, then from pos-
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itive clamp ; and positive terminal =. Begin each time at the contacts on your own vehicle
first.
Close cover : of positive clamp ; after removing the jump leads.
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Close the bonnet.
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Have the battery checked at a qualified specialist workshop.
X
i
Jump-starting is not considered to be a normal operating condition.
i Jump-starting cables and further information regarding jump starting can be obtained at
any qualified specialist workshop.
Towing away and tow-starting
Important safety notes
G WARNING
Safety relevant functions are restricted or no
longer available if:
the engine is not running
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the brake system or power steering is mal-
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functioning
there is a malfunction in the voltage supply
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or the vehicle's electrical system
When your vehicle is towed away or towed
started, you may require considerably more
effort to steer and brake. There is a risk of an
accident.
In such cases use a rigid towing bar. Before
being towed away or tow started, make sure
the steering moves freely.
WARNING
G
If the steering wheel lock is engaged, the vehi-
cle can no longer be steered. There is a risk of
an accident.
Always switch on the ignition when towing
with a tow rope or a towing bar.
G WARNING
When towing or tow-starting another vehicle
and its weight is greater than the permissible
gross weight of your vehicle, the:
towing eye may be torn off
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car/trailer combination may swerve or
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even overturn
There is a risk of an accident.
When towing or tow-starting another vehicle,
its weight should not be greater than the per-
missible gross weight of your vehicle.
Details on the permissible gross vehicle
weight of your vehicle can be found on the
vehicle identification plate (
! When COLLISION PREVENTION ASSIST
PLUS, DISTRONIC PLUS or the HOLD func-
tion is activated, the vehicle brakes auto-
matically in certain situations. To avoid
damage to the vehicle, deactivate these
systems in the following or similar situa-
tions:
when towing away
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in a car wash
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page 396).
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