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Transmission
116in order to prevent the engine from over-
revving, even if the shift range is restricted. Driving situation
è The braking effect of the engine can
be used in this position.
ç To use the braking effect of the
engine on downhill gradients and
for driving:
R
on steep mountain roads
R in mountainous terrain
R in arduous conditions æ To use the braking effect of the
engine on extremely steep downhill
gradients and long downhill
stretches
Restricting the shift range
X
Press the left-hand button on the steering
wheel (Y page 117).
The set shift range appears in the multi-
function display. Derestricting the shift range
X
Press the right-hand button on the steering
wheel (Y page 117).
The set shift range appears in the multi-
function display.
Automatic gearshift program You can select either gearshift program
Cor
S.
The program selector button is located on the
centre console. 1
Program selector button C
Comfort For comfort mode
S
Sport For all normal driving con-
ditions !
Only press program selector button 1
when the selector lever is in position P,N
or D. 1
Current gearshift program
i If gearshift program Cor Sis selected, the
automatic transmission remains in the
selected gearshift program if you start the
engine again.
i All models with diesel engines:
To reduce the demand placed on the torque
converter, the vehicle pulls away in first
gear regardless of the gearshift program
selected.
X Press program selector button 1repeat-
edly until the letter (C/S)for the desired
gearshift program appears in the multi-
function display.
Comfort mode Cis characterised by the fol-
lowing: Controls
251_AKB; 5; 7, en-GB
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Page 234 of 373

Winter driving
231Winter driving
Points to remember
Have your vehicle winterproofed at a qualified
specialist workshop, e.g. at a Mercedes-Benz
Service Centre, at the onset of winter. Winter tyres
In temperatures below +7 °C, always use all-
weather tyres or winter tyres and always use
winter tyres in wintry road conditions.
Only winter tyres displaying the snowflake
symbol in addition to the M+S marking pro-
vide optimum grip in wintry road conditions.
Only these tyres will allow the ABS and ESP
driving systems to function optimally in win-
ter, as these tyres have been designed spe-
cifically for driving on snow.
Use winter tyres of the same make and tread
on all wheels to maintain safe handling char-
acteristics. G
Risk of accident
Winter tyres with a tread depth of less than
4 mm must be replaced immediately. They
are no longer suitable for winter use, can
no longer provide sufficient grip. This could cause you to lose control of your vehicle
and cause an accident.
Always observe the maximum permitted
speed specified for the winter tyres you have
fitted. If you fit winter tyres which have a
lower maximum permitted speed than that of
the vehicle, affix an appropriate warning sign
in the driver's field of vision. This can be
obtained at a qualified specialist workshop,
e.g. from a Mercedes-Benz Service Centre.
Under these circumstances, you should also
restrict the maximum speed of the vehicle
using permanent Speedtronic 28
to the maxi-
mum permissible speed for the winter tyres
(Y page 151).
Once you have fitted the winter tyres:
X Check the tyre pressures (Y page 226).
X Restart the tyre pressure moni-
tor* (Y page 228). G
Risk of accident
If you fit the spare wheel* when driving with
winter tyres, bear in mind that driving sta-
bility will be impaired owing to unstable
cornering characteristics caused by the dif-
ferent tyres. You should therefore adapt
your driving style and drive carefully. Have the spare wheel* replaced at the
nearest qualified specialist workshop
which has the necessary specialist knowl-
edge and tools to carry out the work
required. Mercedes-Benz recommends
that you use a Mercedes-Benz Service
Centre for this purpose. In particular, work
relevant to safety or on safety-related sys-
tems must be carried out at a qualified
specialist workshop. Snow chains
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains which
have been specially approved for your vehicle
by Mercedes-Benz, or are of a corresponding
standard of quality.
! Information about the use of snow chain-
compatible AMG winter tyres is applicable
for AMG tyres. Use of snow chains is only
permissible with these tyres.
! Vehicles with the AIRMATIC package*: do
not drive in ADS SPORTmode when driving
with snow chains fitted.
If you intend to fit snow chains, please bear
the following points in mind:
28 Only available for certain countries. Operation
* optional
251_AKB; 5; 7, en-GB
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Page 325 of 373

Flat tyre
322The air pump can be operated again once
it has cooled down.
If the tyre pressure is higher than 3.0 bar:
X Version 1: open pressure release
screw 4on the pressure gauge until the
tyre pressure is correct.
X Version 2: press pressure release button
6 until the tyre pressure is correct.
X Switch off the electric air pump with on/off
switch 2, remove from the tyre valve and
stow it away.
Lowering the vehicle X
Place the ratchet ring spanner onto the
hexagon nut of the jack so that the lettering
AB is visible.
X Lower the vehicle by turning the ratchet
ring spanner until the vehicle is once again
standing firmly on the ground.
X Place the jack to one side. 1
–5 Wheel bolts
X Tighten the wheel bolts evenly in a cross-
wise pattern in the sequence indica-
ted (1 to5). The tightening torque is
150 Nm . G
Risk of accident
Have the tightening torque checked imme-
diately after a wheel is changed. The wheels
could work loose if they are not tightened
to a torque of 150 Nm.
X Turn the jack back to its initial position and
stow it and the rest of the vehicle tool kit in
the luggage compartment. X
Transport the faulty wheel in the boot.
or
X Depending on the size of the wheel, you
may also be able to secure the faulty wheel
in the emergency spare wheel well. In this
case, you will have to remove the stowage
tray from the emergency spare wheel well
and stow it securely in the luggage com-
partment.
i Do not activate the tyre pressure moni-
tor* until the deflated tyre has been
removed from the vehicle. MOExtended run-flat system*
The MOExtended run-flat system must only
be used in conjunction with the tyre pressure
loss warning system*.
! The maximum permissible distance which
can be driven in run-flat mode depends on
the load in the vehicle. It is 50 km if the
vehicle is partially laden and 30 km if fully
laden.
The maximum range that can be driven in
emergency operation is measured from the
point at which the pressure loss warning
message appears in the multi-function dis-
play. Practical advice
* optional
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Page 351 of 373
Tyres and wheels
348 Mixed tyres
Sports package* All models
19" Front axle Summer tyres 255/5
0 R19 103W Light-alloy wheels 8.5J
x 19 ET 64 Rear axle
Summer tyres
48 285/45 R19 107W
Light-alloy wheels 9.5 J x 19 ET64
AMG equipment*
All models
21" Front axle Summer tyres 265/40 ZR21 105Y XL
Light-alloy wheels 9J x 21 ET 60
48
Snow chains not permitted. Technical data
* optional
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