Assist systems
General information
WARNING■The assistance systems only serve to support and do not relieve the driv-
er of the responsibility for driving the vehicle.■
The increased safety provision, as well as the increased occupant protec-
tion provided by the assistance systems must not tempt you to take risks -
risk of accident!
■
Adjust the speed and driving style to the current visibility, weather, road
and traffic conditions.
■
The assistance systems have physical and system-related limitations. For
this reason, the driver may experience some undesired or delayed system
responses in certain situations. You should therefore always be alert and
ready to intervene!
■
Only activate, deactivate or set the assistance systems so that you have
the car fully under control in every traffic situation - risk of accident!
Braking and stabilisation systems
Introduction
This chapter contains information on the following subjects:
Stability Control (ESC)
110
Anti-lock braking system (ABS)
110
Engine drag torque control (MSR)
110
Traction control (TCS)
111
Electronic Differential Lock (EDL)
111
Driver Steering Recommendation (DSR)
111
Brake Assist (HBA)
111
Hill Start Assist (HHC)
111
Trailer stabilization system (TSA)
112
The brake and stabilization systems are automatically activated each time the
ignition is switched on, unless otherwise indicated.
The error display is in Chapter » page 31, Warning lights .
WARNINGThe general information relating to the use of assistance systems must be
observed » page 110, in section General information .
Stability Control (ESC)
Read and observe
on page 110 first.
The ESC improves vehicle stability when driving at the limit (e.g. if the vehiclestarts to skid) by braking individual wheels to maintain the desired direction.
If there is a TCS intervention, the warning light flashes in the instrument
cluster.
Anti-lock braking system (ABS)
Read and observe
on page 110 first.
ABS prevents the wheels locking when braking. Thus helping the driver to
maintain control of the vehicle.
The intervention of the ABS is noticeable from the pulsating movements of
the brake pedal which is accompanied by noises.
When the ABS system is active, do not brake periodically or reduce the pres-
sure on the brake pedal.
Engine drag torque control (MSR)
Read and observe
on page 110 first.
MSR counteracts the tendency of the drive wheels to lock during downshifts
or sudden deceleration (e.g. on icy or an otherwise slippery road surface).
If the drive wheels should lock, then the engine speed is automatically in-
creased. This reduces the braking effect of the engine and the wheels can ro-
tate freely again.
110Driving
›Jack up the vehicle
» page 158 until the wheel that needs changing is clear of
the ground.›
Unscrew the wheel bolts and place them on a clean surface (cloth, paper,
etc.).
›
Remove the wheel carefully.
›
Attach the spare wheel and slightly screw on the wheel bolts.
›
Lower the vehicle.
›
Tighten the wheel bolts opposite each other using the wheel wrench (“pull- ing crossways”) » page 158.
›
Replace the wheel trim » page 156 and caps » page 157 .
When fitting unidirectional tyres, ensure that the direction of rotation is cor-
rect » page 150 .
All bolts must be clean and must turn easily. If screws are corroded and diffi-
cult to move, these must be replaced.
WARNING■ Undo the wheel bolts just a little (about one turn), provided the vehicle
has not yet been jacked up. Otherwise the wheel could come loose and fall
off – risk of injury.■
Under no circumstances must the bolts be greased or oiled - cause an ac-
cident.
Subsequent steps
After changing the wheel, the following work must be carried out.
›
Stow the replaced wheel in the well under the floor covering of the luggage
compartment and secure with a locking screw.
›
Stow the vehicle tool kit in the space provided.
›
Check tyre pressure on the mounted wheel and adjust if necessary and, with
vehicles with tyre pressure monitoring, save the tyre pressure values in the
system » page 123 .
›
Have the tightening torque of the wheel bolts checked as soon as possible.
The prescribed tightening torque is 120 Nm.
Replace the damaged wheel or consult a specialist garage about repair op-
tions.
WARNINGTightening torque which is too high can damage the threads and this can
result in permanent deformation of the contact surfaces on the rim. Where
tightening torque is too low, the wheels may become loose while driving -
There is a risk of an accident. Therefore drive cautiously and only at a mod-
erate speed until the tightening torque has been checked.
Removing /stowing the spare wheel
Fig. 171
Take out the wheel
The spare wheel is located in a well under the floor covering in the luggage
compartment and is fixed in place with a fastening screw.
Take out the wheel
›
Lift up the floor in the luggage compartment.
›
Unscrew the locking screw in the direction of arrow » Fig. 171 and the remove
the wheel.
›
Remove the box with the tool kit.
Store wheel away
›
Store the box for the vehicle tools in the same place.
›
Place the wheel into the wheel well with the wheel rim pointing downwards.
›
Screw the locking screw against the direction of arrow until it stops » Fig. 171.
›
Fold back the floor in the luggage compartment.
Full wheel trim
Remove trim
›
Hang the clamps for removing the full wheel trims on the edge of the full
wheel trim.
›
Push the wheel wrench through the clamp, support on the tyre and pull off
the wheel trim.
156Do-it-yourself
