Mercedes-Benz Coupe Operator's Manual page 244

Towing and tow-starting
242
Connect negative terminal = of donor battery B to earth point ? of your vehicle using
X
the jumper cable, connecting the jumper cable to donor battery B first.
Start the engine.
X
Before disconnecting the jumper cables, let the engine run for several minutes.
X
First, remove the jumper cables from earth point ? and negative terminal =, then from
X
positive clamp : and positive terminal ;. Each time beginning with your vehicle's battery.
Slide cover A of the positive terminal in the opposite direction to the arrow.
X
Have the battery checked at a qualified specialist workshop.
X
i
Jump-starting is not considered to be a normal operating condition.
i
Jumper cables and further information regarding jump-starting can be obtained at any
qualified specialist workshop.
Towing and tow-starting
Important safety notes
If the vehicle can no longer be driven because
of an accident or breakdown, you have the
following options:
transporting the vehicle
R
As a rule, you should have the vehicle
transported.
towing the vehicle with the rear axle raised
R
Only tow the vehicle with the rear axle
raised in exceptional cases.
towing the vehicle with a tow rope or tow
R
bar
Only tow the vehicle in exceptional cases.
The engine must be running if you tow the
vehicle with a tow rope or tow bar. Observe
the following notes.
G
WARNING
The rear axle locks when:
the engine is not running
R
the engine stalls while the vehicle is being
R
towed
there is a malfunction in the power supply
R
or the vehicle's electrical system
There is a risk of an accident.
In the event of a breakdown, you should
always have the vehicle transported.
G
WARNING
If the brake system or power steering is
malfunctioning and your vehicle is then towed
away, significantly more effort may be
required to steer and brake than is normally
required. There is a risk of an accident.
In such cases, use a tow bar. Before towing,
make sure that the steering moves freely.
! Use the SmartKey instead of the Start/
Stop button when towing the vehicle.
Start the engine and keep it running. Turn
the SmartKey to position 2 in the ignition.
Set the transmission to N using the E-
SELECT lever. Make sure that you then
leave the SmartKey in position 2.
Check the transmission position in the
instrument cluster.
! Make sure that the electric parking brake
is released. If the electric parking brake is
faulty, visit a qualified specialist workshop.
Mercedes-Benz recommends that you use
an authorized Mercedes-Benz Center for
this purpose.
! When towing, pull away slowly and
smoothly. If the tractive power is too high,
the vehicles could be damaged.
! Only secure the tow rope or tow bar at the
towing eyes. Otherwise, the vehicle could
be damaged.