Page 57 of 345
54 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Seat heater
The seat heaters can be switched on with the electronic
key in steering lock positions 1 or 2.Notes:
When in operation, the seat heater consumes a large
amount of electrical power. It is not advisable to use the
seat heater longer than necessary.
The seat heaters may automatically switch off if too
many power consumers are switched on at the same
time, or if the battery charge is low. When this occurs,
the indicator lamp in the switch will blink (both
indicator lamps blink during rapid seat heating mode).
The seat heaters will switch on again automatically as
soon as sufficient voltage is available.
If the blinking of the indicator lamps is distracting to
you, the seat heaters can be switched off.
Page 133 of 345

130 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Rear window defroster
Turn electronic key in steering lock to position 2.
To select, press F button.
To cancel, press F button again.
Notes:
Heavy accumulation of snow and ice should be removed
before activating the defroster.
The rear window defroster uses a large amount of power.
To keep the battery drain to a minimum, turn off the
defroster as soon as the window is clear.
The defroster is automatically turned off after a
maximum of 12 minutes of operation.
If several power consumers are turned on
simultaneously, or the battery is only partially charged,
it is possible that the defroster will automatically turn
itself off. When this happens, the indicator lamp inside
the switch starts blinking.
As soon as the battery has sufficient voltage, the
defroster automatically turns itself back on.Air distribution
UPress b button for each side repeatedly until the
requested symbol is displayed.
Air volume
Press - or + side of rocker switch ï until the
requested blower speed is attained. A choice of 7 blower
speeds is available.
To switch the automatic climate control off, press - side
of rocker switch ï until symbol OFF is displayed.IThe fresh air supply to the car interior is shut off.
While driving, use this setting only temporarily,
otherwise the windshield could fog up.
To switch the automatic climate control on again, press
U, P, or + side of ï.
Page 157 of 345
154 Interior equipment
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Power w indows
Power window switches located on center console
Switches for:
1left, front
2left, rear
3right, front
4right, rear
5Switch for rear door window overridePower window switches located in rear doors
6Individual switches (rear doors)
Turn electronic key in steering lock to position 1 or 2.
Press switch in to resistance point:
kto open
jto close
Release switch when window is in desired position.
152
43
P54.25-2119-26
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155 Interior equipment
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Express opening and closing
Press switch k or j past resistance point and
release — window opens or closes completely.
To interrupt procedure, briefly press k or j.
If the upward movement of the window is blocked
during the closing procedure, the window will stop
during the last few inches before closure and open
slightly.
When pressing and holding the switch j to close the
window, and upward movement of the window is
blocked during the last few inches before closure, it will
stop but not
open slightly.Blocking of rear door window operation
If no operation of the rear windows by switch (6) (for
instance by children) is desired, slide override
switch (5) to right, symbol N becomes visible.
Note:
The power windows can also be opened or closed with
the electronic main key while unlocking or locking the
vehicle doors, see page 32.
Wa r n i n g !
When leaving the vehicle, always remove the
electronic key from the steering lock and lock the
vehicle. Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment can cause
serious personal injury.
Wa r n i n g !
When closing the windows, be sure that there is no
danger of anyone being harmed by the closing
procedure.In case of obstruction, the automatic reversal will
not operate if a window is being closed by pressing
the switch to its resistance point and holding it
there, or when using the remote control.The closing procedure can be immediately reversed
by either pressing the switch k, or pressing
button Œ on the remote control, and holding it.
Page 159 of 345
156 Interior equipment
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Synchronizing power windows
If the power supply was interrupted (battery
disconnected or low), the windows cannot be opened or
closed by the Express feature.
To resynchronize the express feature, press j side of
power window switch until the window is completely
closed and hold for additional 2 seconds. Repeat
procedure for each window.
The automatic full opening and closing procedure of the
windows should now be restored.Sliding / pop-up roof (optional)
1to slide roof open
Push to open half-way, push again to open fully.
2to slide roof closed
3to raise roof at rear
4to lower roof at rear
Turn electronic key in steering lock to position 1 or 2.
P68.00-2100-26
1
2
34
Page 161 of 345

158 Interior equipment
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Express opening of sliding / pop-up roof
Move switch past resistance point and release — the
sliding / pop-up roof slides open half-way. Move again to
open fully.
To interrupt procedure, briefly move switch in any
direction.Synchronizing sliding / pop-up roof
If the power supply was interrupted (battery
disconnected or low), or if the sliding/pop-up roof is
blocked during closing/opening procedure, the system
has to be synchronized.
To do so, turn electronic key in steering lock to
position 2, move and hold switch in direction (3) until
the sliding/pop-up roof is completely raised at rear, and
hold for additional 1 second.
Notes:
The sliding / pop-up roof can be opened or closed
manually should an electrical malfunction occur, see
page 301.
The sliding / pop-up roof can also be opened or closed
with the electronic main key while unlocking or locking
the vehicle doors, see page 32.
Page 186 of 345

183 Contents - Driving
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
DrivingControl and operation of radio
transmitters ............................... 184
The first 1 000 miles
(1 500 km) ................................. 185
Maintenance ................................... 185
Tele Aid............................................ 186
Catalytic converter......................... 196
Emission control ............................ 197
Steering lock ................................... 198
Starting and turning off
the engine .................................. 200
Automatic transmission................ 201
Parking brake ................................. 210Driving instructions....................... 211
Drive sensibly -
Save Fuel ...................................... 211
Drinking and Driving ................ 211
Pedals ........................................... 211
Power assistance .........................212
Brakes ...........................................212
Driving off ....................................213
Parking .........................................213
Tires ..............................................214
Snow chains ................................ 216
Winter driving instructions ......217
Block heater .................................218
Deep water ...................................219
Passenger compartment ............219
Traveling abroad ......................... 219Cruise control ................................. 220
Brake assist system
(BAS) ........................................... 223
Antilock brake system
(ABS) ........................................... 225
Four wheel electronic
traction system
(4MATIC) .................................... 227
Electronic stability
program
(ESP) ........................................... 228
Parking assist (Parktronic) .......... 232
What you should know
at the gas station ....................... 237
Check regularly and
before a long trip....................... 239
Page 202 of 345

199 Steering lock
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Important!
If the electronic key is left in the steering lock position 0
for an extended period of time, it can no longer be
turned in the lock. In this case, remove electronic key
from steering lock and reinsert.
Caution!
To prevent accelerated battery discharge and a possible
dead battery, always remove the electronic key from the
steering lock. Do not leave the electronic key in steering
lock position 0.Notes:
A warning sounds when the driver’s door is opened
while the electronic key is in steering lock position 1
or 0.
With the engine at idle speed, the charging rate of the
alternator (output) is limited.
It is therefore recommended that you turn off
unnecessary electrical consumers while driving in
stop-and-go traffic. This precaution helps to avoid
draining of the battery.
Unnecessary strain on the battery and charging system
may be minimized by turning off the following power
consumers, for example:
Heated seats, rear window defroster. In addition, the
automatic climate air volume control should be set to
the lowest position.
The steering lock can only be unlocked with the vehicle
battery properly charged and connected.