169
Driving
Driving SteeringIntroduction
The power steering is not hydraulic but electromechanical. The advantage
of this steering system is that it disposes of hydraulic tubes, hydraulic oil,
the pump, filter and other components. The electromechanical system
saves fuel. While a hydraulic system requires oil pressure to be maintained,
electromechanical steering only requires energy when the steering wheel is
turned.
With the power steering system, the assisted steering function automatical-
ly adjusts according to the vehicle speed, the steering torque and the wheel
turning angle. The power steering only works when the engine is running.
Additional information and warnings:
● Start and stop the engine ⇒ page 172
● Vehicle battery ⇒ page 292
● Tow starting and towing away ⇒ page 344
WARNING
If the power steering is not working then the steering wheel is much
more difficult to turn and the vehicle more difficult to control.
● The power steering only works when the engine is running.
● Never allow the vehicle to move when the engine is switched off.
● Never remove the key from the ignition if the vehicle is in motion. The
steering may lock and it will not be possible to turn the steering wheel.
Control and warning lamps
lights upPossible causeSolution
(red)Power steering faulty.The steering system should be
checked by a specialised work-
shop as soon as possible.
(yellow)
Power steering operation re-
duced.
The steering system should be
checked by a specialised work-
shop as soon as possible.
If, after restarting the engine
and driving for a short distance,
the yellow warning lamp no lon-
ger comes on, it will not be nec-
essary to take the vehicle to a
specialised workshop.
The vehicle battery was dis-
connected and has been re-
connected.Travel a short distance at about
15-20 km/h (9-12 mph).
Safety FirstOperating instructionsPractical TipsTechnical Specifications
270Checking and refilling levels
WARNING
Driving with insufficient fuel reserve could result in the vehicle breaking
down in traffic and a serious accident.
● If the fuel level is too low then the fuel supply to the engine can be-
come irregular especially on slopes.
● If the engine “is choked” or stalls due to lack of or irregularity of the
fuel supply, the power steering as well as all of the driver assistance sys-
tems including braking assistance will stop working.
● Always refuel when there is only one quarter of the fuel tank left to
avoid running out of fuel.
CAUTION
● Always pay attention to any lit control lamps and to the corresponding
descriptions and instructions to avoid damage to the vehicle.
● Never run the fuel tank completely dry. An irregular fuel supply may lead
to ignition faults and unburnt fuel could enter the exhaust system. This
could damage the catalytic converter filter or the diesel particulate filter!
Note
The arrow next to the fuel pump symbol on the instrument panel ⇒ Fig. 165
indicates the side of the vehicle on which the tank flap is located. Filling the tank with petrol or diesel
Fig. 166 Open tank flap
with tank cap attached to
the holder
Before refuelling, always turn off the engine, the ignition, mobile tele-
phones, auxiliary heating and keep them off during refuelling.
Opening the fuel tank cap
● The tank flap is at the rear of the vehicle on the right.
● Press the rear of the tank flap to open it.
● Unscrew the tank cap anticlockwise and insert it in the hole in the tank
flap hinge ⇒ Fig. 166.
Refuelling
The correct petrol type for the vehicle is located on a sticker inside the fuel
tank flap ⇒ page 271.
● If the automatic filler nozzle is operated correctly, it will switch itself off
as soon as the fuel tank is full
⇒
.
● Do not continue to refuel if it is turned off! Otherwise, this will fill the ex-
pansion chamber and fuel may leak out if the ambient conditions are warm.
