2012 MERCEDES-BENZ A CLASS snow chains

R
at any time, you can intervene in the steer-
ing procedure to correct it. Active Parking
Assist will then be cancelled.
R when transporting a load which protrudes
from your vehicle, you should not use
Active Parking Assist.
R never use Active Parking Assist when snow
chains are fitted.
R make sure that the tyre pressures are
always correct. This has a direct influence
on the parking characteristics of the vehi-
cle.
General notes Active Parking Assist is an electronic parking
aid with ultrasound. Ultrasound is used to
measure

the road on both sides of the vehicle.
A suitable parking space is indicated by the
parking symbol. Active steering intervention
can assist you during parking.
You may also use PARKTRONIC
(Y page 182). When PARKTRONIC is switched
off, Active Parking Assist is also unavailable.
Use Active Parking Assist for parking spaces:
R that are parallel to the direction of travel
R that are on straight roads, not bends
R that are on the same level as the road, e.g.
not on the pavement
Detecting parking spaces Objects located above the height range of
Active Parking Assist will not be detected
when the parking space is measured. These
are not taken into account when the parking
procedure is calculated, e.g. overhanging
loads,

tail sections or loading ramps of goods
vehicles. G
WARNING
If objects are located above the detection
range,
Active Parking Assist may start to steer
into the parking space too soon. As a result,
you could cause a collision. There is a risk of
an accident. If objects are located above the detection
range, stop the vehicle and switch Active
Parking Assist off.
For further information on the detection
range (Y page 183).
Active Parking Assist does not support you
parking in spaces that are parallel to the
direction of travel if:
R the parking space is on a kerb stone
R the parking space appears to be blocked,
for example by foliage or grass paving
blocks
R the range of movement is too small
R the

parking space is bordered by an obsta-
cle which is not clearly defined such as a
tree or a trailer :
Detected parking space on the left
; Parking symbol
= Detected parking space on the right
Active Parking Assist is activated automati-
cally when driving forwards. The system is
operational

at speeds of up to approximately
35 km/h. While in operation, the system inde-
pendently locates and measures parking
spaces on both sides of the vehicle.
Active Parking Assist will only detect parking
spaces:
R that are parallel to the direction of travel
R that are at least 1.5 m wide
R that are at least 1.3 m longer than your
vehicle
i In the case of parking spaces that are at
right angles to the direction of travel,
please ensure that the parking space is
long enough to accommodate your vehicle. Driving systems
187
Driving and parking Z

Speed Limit Assist
Displaying Speed Limit Assist
X
Press the = or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
Speed Limit Assist.
X Press the a button.
Under certain conditions, detected speed
limits are shown in the multifunction dis-
play

(Y page 196).
Activating/deactivating the Speed Limit
Assist message function
X Press the =
or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
Speed Limit Assist.
X Press the a button.
The multifunction display shows Speed
Limit Assist.
X Press the : button.
The current selection is displayed.
X To activate or deactivate: press a.
If
the Speed Limit Assist message function
is activated, a detected speed limit is auto-
matically displayed for five seconds. Other
items in the multifunction display are not
shown during this time.
When Speed Limit Assist is operational and
the message function is activated, the
assistance graphic shows the Ä sym-
bol.
Deactivating/activating ESP ®i
Observe
the "Important safety notes" sec-
tion in the description of ESP ( Y page 65).G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only

deactivate ESP ®
in the situations descri-
bed in the following. It may be best to deactivate ESP
®
in the fol-
lowing situations:
R when using snow chains
R in deep snow
R on sand or gravel
Deactivating/activating ESP ®
on AMG vehi-
cles ( Y page 66).
For further information about ESP ®
, see
(Y page 65).
X Start the engine.
X Press the =
or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
ESP.
X Press the a button.
X To activate/deactivate: press the a
button again.
ESP ®
is deactivated if the å warning
lamp in the instrument cluster lights up
continuously when the engine is running.
If the ÷
warning lamp and the å warn-
ing lamp are lit continuously, ESP ®
is not
available due to a malfunction.
Observe the information on warning lamps
(Y page 260).
Observe the information on display messages
(Y page 230).
Activating/deactivating the distance
warning function X
Press the =
or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
Distance warning.
X Press the a button.
The current selection is displayed.
X To activate/deactivate: press the a
button again.
When the distance warning function is
deactivated, the æ symbol appears in
the multifunction display in the assistance
graphics display. 218
Menus and submenus
On-board computer and displays

does not exceed the maximum permissible
speed for the M+S tyres(Y page 172).
When you have fitted the M+S tyres:
X
Check the tyre pressures ( Y page 321).
X Restart the tyre pressure loss warning sys-
tem (Y page 323).
For more information on driving with the
emergency spare wheel, see (Y page 332). Snow chains
G
WARNING
If snow chains are fitted to the rear wheels,
they may scrape against the vehicle body or
chassis components. This could cause dam-
age

to the vehicle or the tyres. There is a risk
of an accident.
To avoid hazardous situations:
R never fit snow chains on the rear wheels
R always fit snow chains in pairs to the front
wheels.
! Vehicles with steel wheels: if you fit
snow chains on steel wheels, you may dam-
age the hub caps. Remove the hub caps
from the relevant wheels before fitting the
snow chains.
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains that
have been specially approved for your vehicle
by Mercedes-Benz, or that are of a corre-
sponding standard of quality.
If you intend to fit snow chains, please bear
the following points in mind:
R snow chains cannot be fitted to all wheel-
tyre combinations. Permissible wheel-tyre
combinations (Y page 329).
R only use snow chains when the road sur-
face is completely snow-covered. Remove
the snow chains as soon as possible when
you come to a road that is not snow-cov-
ered. R
local regulations may restrict the use of
snow

chains. Observe the appropriate reg-
ulations if you wish to fit snow chains.
R do not exceed the maximum permissible
speed of 50 km/h.
R when snow chains are fitted, never use
Active Parking Assist (Y page 186).
i You may wish to deactivate
ESP ®
(Y page 65) when pulling away with
snow chains fitted. This way you can allow
the wheels to spin in a controlled manner,
achieving an increased driving force (cut-
ting action).
Information about driving with an emergency
spare wheel ( Y page 332). Tyre pressure
Tyre pressure specifications
G
WARNING
Tyres with too low or too high tyre pressure
contain the following hazards:
R they

can burst, in particular if the vehicle is
heavily laden or when driven at high
speeds.
R the tyres can wear excessively and/or
unevenly, which can severely impair tyre
traction.
R the driving, steering and braking character-
istics may be severely impaired.
There is a risk of accident.
Follow recommended tyre inflation pressures
and check the pressure of all the tyres includ-
ing the spare wheel:
R at least every two weeks
R if the load changes
R before beginning a long journey
R for changed operating conditions, e.g. off-
road driving
If necessary, correct the tyre pressure. Tyre pressure
321
Wheels and tyres Z

i
The tyre pressure values given for low
loads are minimum values which offer you
good ride comfort characteristics.
However,
you can also use the values given
for higher loads. These are permissible and
will not adversely affect the running of the
vehicle. Tyre pressure loss warning system
Important safety notes While the vehicle is in motion, the tyre pres-
sure loss warning system monitors the set
tyre pressure using the rotational speed of
the

wheels. This enables the system to detect
significant pressure loss in a tyre. If the speed
of rotation of a wheel changes as a result of
a loss of pressure, a corresponding warning
message will appear in the multifunction dis-
play.
The tyre pressure warning system does not
warn you of an incorrectly set tyre pressure.
Observe the notes on the recommended tyre
pressure ( Y page 321).
The tyre pressure loss warning system does
not replace the need to regularly check your
vehicle's tyre pressures, since an even loss of
pressure on several tyres at the same time
cannot be detected by the tyre pressure loss
warning system.
The tyre pressure monitor is not able to warn
you of a sudden loss of pressure, e.g. if the
tyre is penetrated by a foreign object. In the
event of a sudden loss of pressure, bring the
vehicle to a halt by braking carefully. Avoid
abrupt steering manoeuvres.
The function of the tyre pressure loss warning
system is limited or delayed if:
R snow chains are fitted to your vehicle's
tyres.
R road conditions are wintry.
R you are driving on sand or gravel.
R you adopt a very sporty driving style (cor-
nering at high speeds or driving with high
rates of acceleration). R
you
are towing a very heavy or large trailer.
R you are driving with a heavy load (in the
vehicle or on the roof).
Restarting the tyre pressure loss warn-
ing system Restart the tyre pressure loss warning system
if you have:
R
changed the tyre pressure
R changed the wheels or tyres
R fitted new wheels or tyres
X Before restarting, make sure that the tyre
pressures

are set properly on all four tyres
for the respective operating conditions.
The recommended tyre pressures can be
found in the table on the fuel filler flap.
The tyre pressure loss warning system can
only give reliable warnings if you have set
the correct tyre pressure. If an incorrect
tyre pressure is set, these incorrect values
will be monitored.
X Observe the notes on tyre pressure
(Y page 321).
X Make sure that the key is in posi-
tion 2(Y page 143) in the ignition lock.
X Press the =
or ; button on the steer-
ing wheel to select the Service menu.
X Press the 9 or : button to select
Tyre pressure.
X Press the a button.
The Run Flat Indicator active
Restart

with OK message appears in the
multifunction display.
If you wish to confirm the restart:
X Press the a button.
The Tyre press. now OK? message
appears in the multifunction display.
X Press the 9 or : button to select
Yes.
X Press the a button.
The Run Flat Indicator restarted
message appears in the multifunction dis-
play. Tyre pressure
323
Wheels and tyres Z

Tyres
Summer tyres Light-alloy wheels V
1 V
2 V
3 V
4 V
5 V
6 V
7 BA 195/65 R15 91 T 6.5 J x 15 H2 ET 47 — #
— — — — —
BA
195/65 R15 91 H
13 6.5 J x 15 H2 ET 47 #
— — — — — —
BA 205/55 R16 91 H 6.5 J x 16 H2 ET 49 # #
— #
— — —
BA
205/55 R16 91 V
14 6.5 J x 16 H2 ET 49 # # # #
— — —
BA 205/55 R16 91 V
MOExtended
14, 15 6.5 J x 16 H2 ET 49 # # # #
— — —
BA
225/45 R17 91 V
14, 16 7.5 J x 17 H2 ET 52.5 # # # # #
— —
BA 225/45 R17 91 W
MOExtended
14, 15, 16 7.5 J x 17 H2 ET 52.5 # # # # #
— —
BA 225/40 R18 92 W XL
MOExtended
14, 15, 16, 17 7.5 J x 18 H2 ET 52 # # # # #
— —
BA
235/40 ZR18 95 Y XL
16 8.0 J x 18 H2 ET 48 — — — — — # #
BA
235/35 ZR19 91 Y XL
16 8.0 J x 19 H2 ET 48 — — — — — — #
Winter tyres Light-alloy wheels V
1 V
2 V
3 V
4 V
5 V
6 V
7 BA 195/65 R15 91 T
M+S
i 13 6.5 J x 15 H2 ET 47 # #
— — — — —
BA 205/55 R16 91 H
M+S
i 14 6.5 J x 16 H2 ET 49 # # # #
— — —
BA 205/55 R16 91 H
M+S
iMOExtended 14, 15 6.5 J x 16 H2 ET 49 # # # #
— — —
BA 205/50 R17 93 H XL
M+S
i 6.5 J x 17 H2 ET 49 # # # # # #
—
BA 205/50 R17 93 H XL
M+S
iMOExtended 14, 15 6.5 J x 17 H2 ET 49 # # # # # #
—
13
A 180 BlueEFFICIENCY: only for vehicles with 15" tyres fitted at the factory.
14 A 250 BlueEFFICIENCY: not in conjunction with Sports Edition package (code P84).
15 MOExtended tyres (tyres featuring run-flat characteristics) only in combination with an activated tyre pres-
sure loss warning system.
16 Use of snow chains not permitted. Observe the notes in the "Snow chains" section.
17 Observe notes on "Large wheels" in the "Wheel/tyre combinations" section. Wheel and tyre combinations
331Wheels and tyres Z

Winter tyres Light-alloy wheels V
1 V
2 V
3 V
4 V
5 V
6 V
7 BA 215/45 R18 93 V XL
M+S
i 7.5 J x 18 H2 ET 42 — — — — — — #
BA 235/40 R18 95 V XL
M+S
i 16 8.0 J x 18 H2 ET 48 — — — — — — #
Emergency spare wheel
Important safety notes
G
WARNING
The wheel/tyre dimensions and the tyre type
of the spare wheel/emergency spare wheel
and the wheel to be replaced may differ. Fit-
ting a spare wheel/emergency spare wheel
may severely impair the driving characteris-
tics. There is a risk of accident.
To prevent hazardous situations:
R Adapt your driving style accordingly and
drive carefully.
R Never
fit more than one spare wheel/emer-
gency spare wheel if the dimesions are dif-
ferent to those of the wheel being replaced.
R Only use a spare wheel/emergency spare
wheel briefly if the dimesions are different
to those of the wheel being replaced.
R Do not switch off ESP ®
.
R Have the spare wheel/emergency spare
wheel in question replaced at the nearest
qualified specialist workshop. Make sure
that the wheel/tyre dimensions and tyre
type are correct.
When using an emergency spare wheel or
spare wheel of a different size, you must not
exceed the maximum speed of 80 km/h.
Snow chains must not be fitted to emergency
spare wheels. General notes
You should regularly check the pressure of
the

emergency spare wheel, particularly prior
to long trips, and correct the pressure as nec-
essary ( Y page 321). The value on the wheel
or as given in the "Technical data" section
(Y page 329) is valid.
i When you are driving with the emergency
spare wheel fitted, the tyre pressure loss
warning system cannot function reliably.
Only restart the tyre pressure loss warning
system when the defective wheel has been
replaced with a new wheel.
An emergency spare wheel may also be fitted
against the direction of rotation. Observe the
time restriction on use as well as the speed
limitation specified on the emergency spare
wheel.
Replace the tyres after six years at the latest,
regardless of wear. This also applies to the
emergency spare wheel. Removing the emergency spare wheel
16
Use of snow chains not permitted. Observe the notes in the "Snow chains" section.332
Emergency spare wheel
Wheels and tyres