Driving and operating129
may be a fault in the diesel particle
filter 3 85. Cleaning is not possible,
seek the assistance of a workshop
immediately.Caution
If the cleaning process is
interrupted, there is a risk of
provoking severe engine damage.
Cleaning takes place quickest at high engine speeds and loads.
Do not switch off the engine until the
cleaning process is complete. This is
indicated by the extinguished control
indicator %.
Catalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gases.
Caution
Fuel grades other than those listed on pages 3 144, 3 202 could
damage the catalytic converter or
electronic components.
Unburnt petrol will overheat and
damage the catalytic converter.
Therefore avoid excessive use of the starter, running the fuel tank
dry and starting the engine by
pushing or towing.
In the event of misfiring, uneven
engine running, a reduction in engine performance or other unusual
problems, have the cause of the fault
rectified by a workshop as soon as
possible. In an emergency, driving
can be continued for a short period,
keeping vehicle speed and engine
speed low.
Malfunction indicator light 3 85.
Automatic transmission
The automatic transmission permits
automatic gearshifting (automatic
mode) or manual gearshifting
(manual mode).
Transmission display
The mode or selected gear is shown
in the transmission display.
P=park positionR=reverse gearN=neutral
132Driving and operating
Activation
In automatic mode, press button
s ; control indicator s
illuminates in the instrument cluster 3 89.
The settings of certain electronic
systems are adapted to reduce fuel
consumption:
■ The engine reacts less quickly to the accelerator pedal.
■ Automatic upshift points occur sooner and downshift points occur
later.
■ The transmission locks itself to the engine at cruising speeds, to
improve efficiency and increase
power and torque.
■ The fuel supply is automatically cut-
off more quickly during vehicle
deceleration. Overrun cut-off
3 125.
Do not use fuel economy mode whilst towing, e.g. a trailer.Deactivation
Fuel economy mode is switched off
by pressing button s again;
control indicator s extinguishes in
the instrument cluster.
Fault
In the event of a fault in the automatic
transmission, control indicator Z
illuminates in the instrument cluster 3 85 . Automatic shifting may be much
harsher than normal or, in the case of
a serious fault, cancelled altogether.
Have the cause of the fault remedied
by a workshop.
If control indicator g illuminates in
the instrument cluster when the
engine is running, this may indicate a
fault in the transmission electronics
3 85. The electronics switch to the
emergency running programme, fuel
consumption may increase and the
driveability of the vehicle may be
affected. Seek the assistance of a
workshop.Interruption of power
supply
The clutch is not disengaged if the
vehicle battery is discharged and a
gear has been selected. The vehicle
cannot move. The selector lever
cannot be moved out of position P or
N .
If the battery is discharged, start the
vehicle using jump leads 3 187.
If the battery is not the cause of the
fault, release the selector lever:
1. Switch off ignition and remove the
key.
2. Depress and hold foot brake.
