Driving 192
Driving
Steering
Introduction
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, electro-
mechanical steering only requires energy when the steering wheel is turned.
With the power steering system, the assisted steering function automatically
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:
xStart and stop the engine Ÿpage 195
xVehicle battery Ÿpage 318
xTow-starting and towing away Ÿpage 375
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.
xThe power steering only works when the engine is running.
xNever allow the vehicle to move when the engine is switched off.
xNever 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
D (red)Power steering faulty.The steering system should be
checked by a qualified workshop
as soon as possible.
D (yel-
low)
Power steering operation
reduced.
The steering system should be
checked by a qualified workshop
as soon as possible.
If, after restarting the engine and
driving for a short distance, the
yellow warning light no longer
comes on, it will not be neces-
sary to take the vehicle to a spe-
cialised workshop.
The vehicle battery was dis-
connected and has been
reconnected.Drive for a short distance at 15 –
20 km/h.
Checking and refilling levels295
Safety FirstOperating instructionsPractical tipsTe c h n i c a l D a t a
WARNING
Driving with insufficient fuel reserve could result in the vehicle breaking
down in traffic and a serious accident.
xIf the fuel level is too low then the fuel supply to the engine can become
irregular especially on slopes.
xIf 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
systems including braking assistance will stop working.
xAlways refuel when there is only one quarter of the fuel tank left to
avoid running out of fuel.
Caution
xAlways pay attention to any lit lamps and to the corresponding descrip-
tions and instructions to avoid damage to the vehicle.
xNever run the 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 Ÿpage 294,
fig. 169 indicates the side of the vehicle on which the tank flap is located.
Filling the tank with petrol or diesel
Before refuelling, always turn off the engine, the ignition, mobile telephones,
auxiliary heating and keep them off during refuelling.
Unscrewing the tank cap
xThe tank flap is at the rear of the vehicle on the right.
xPress the rear of the tank flap to open it.
xUnscrew the tank cap anti-clockwise and insert it in the hole in the tank
flap hinge Ÿfig. 170.
Refilling
The correct petrol type for the vehicle is located on a sticker inside the fuel
tank flap Ÿpage 297.
xIf the automatic filler nozzle is operated correctly, it will switch itself off as
soon as the tank is full Ÿ.
xDo not continue to refuel if it is turned off! Otherwise, this will fill the
expansion chamber and fuel may leak out if the ambient conditions are warm.
Fig. 170 Open tank flap
with tank cap attached to
the holder.
