Automatic Transmission - Mercedes-Benz M-Class Owner's Manual

Problem
Vehicles with a petrol
engine:
The engine is not run-
ning smoothly and is
misfiring.
The coolant tempera-
ture display is showing
more than 120 †. The
coolant warning lamp
may also be on and a
warning tone may
sound.

Automatic transmission

Important safety notes
G
WARNING
The movement of the pedals must not be
impaired in any way. Do not keep any objects
in the driver's footwell. Make sure that floor-
mats or carpets are correctly secured and
that there is sufficient clearance for the ped-
als.
Do not place several floormats on top of one
another.
G
WARNING
Do not change down for additional engine
braking on a slippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid. This could cause you
Possible causes/consequences and M Solutions
There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
Only depress the accelerator pedal slightly.
X
Have the cause rectified immediately at a qualified specialist
X
workshop, e.g. a Mercedes-Benz Service Centre.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
Stop as soon as possible and allow the engine and the coolant
X
to cool down.
Check the coolant level (
X
notes as you do so and top up the coolant if necessary.
If the coolant level is correct, the radiator fan may be faulty. The
coolant is too hot and the engine is no longer being cooled suffi-
ciently.
At coolant temperatures under 120 †, drive on to the nearest
X
qualified specialist workshop, e.g. to a Mercedes-Benz Service
Centre.
Avoid heavy loads on the engine as you do so, e.g. driving on
X
mountain roads and stop-start traffic.
Automatic transmission
page 321). Observe the warning
Y
to lose control of your vehicle and cause an
accident.
DIRECT SELECT lever
Overview of transmission positions
The DIRECT SELECT lever is on the right of the
steering column.
145
Z