Mercedes-Benz 2013 GLS Class - Manual (Page 167)

Problem Possible causes/consequences and M Solutions
Vehicles with a petrol
engine:
The engine is not run-
ning smoothly and is
misfiring. 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 con-
verter and damage it.
X Have the cause rectified immediately at a qualified specialist
workshop.
The coolant tempera-
ture display is showing
more than 120 †. The
coolant warning lamp
may also be lit 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 339). Observe the warning
notes as you do so and top up the coolant if necessary.
If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic.
Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position
D or
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission position
D or R,
always firmly depress the brake pedal and do
not simultaneously accelerate.
G
WARNING
The automatic transmission switches to neu-
tral position
N when you switch off the engine.
The vehicle may roll away. There is a risk of
an accident.
After switching off the engine, always switch
to parking position
P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
Automatic transmission
165
Driving and parking
Z