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Problem
Possible causes/consequences and MM Solutions
The engine does not
start. You cannot hear
the starter motor.
The on-board voltage is too low because the battery is too weak or
discharged.
X
Jump-start the vehicle (Y page 282).
If the engine does not start despite attempts to jump-start it:
X
Consult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
X
Allow the starter motor to cool down for approximately two minutes.
X
Try to start the engine again.
If the engine still does not start:
X
Consult a qualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing.
There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
X
Have the cause rectified immediately at a qualified specialist work-
shop.
The coolant temperature
gauge shows a value
above 248 ‡ (120 †).
The coolant warning
lamp may also be on and
a warning tone may
sound.
The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant to
cool down.
X
Check the coolant level (Y page 263). Observe the warning notes
as you do so and add coolant if necessary.
Notes on towing vehicles
The vehicle is not suitable for attaching tow bar
systems, such as those used for flat towing or
dinghy towing.
Attaching or using tow bar systems may result in
damage to the vehicle.
When towing a vehicle with tow bar systems,
safe driving characteristics cannot be guaran-
teed for the towing vehicle or the towed vehicle.
The vehicle/trailer combination may swerve.
Observe the permissible towing methods
(Y page 287) and the notes on towing with both
axles on the ground (Y page 286).
DYNAMIC SELECT button (all vehicles
except Mercedes-AMG vehicles)
Use the DYNAMIC SELECT button to change the
drive program. Depending on the drive program
selected the following vehicle characteristics
will change:
R
the drive (engine and transmission manage-
ment)
R
the suspension (vehicles with damping sys-
tem or AMG adaptive sport suspension sys-
tem)
R
the sound of the exhaust system (vehicles
with sports exhaust system)
R
the steering
R
the availability of the ECO start/stop function
R
the climate control
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program C is
DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles)
129
Driving and parking
Z
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