Page 10 of 350

7 IntroductionProduct information
Kindly observe the following in your own best interest:
We recommend using Mercedes-Benz original parts as well as conversion parts and accessories
explicitly approved by us for your vehicle model.
We have tested these parts to determine their reliability, safety and their special
suitability for Mercedes-Benz vehicles.
We are unable to make an assessment for other products and therefore cannot be held responsible
for them, even if in individual cases an official approval or authorization by governmental or other
agencies should exist. Use of such parts and accessories could adversely affect the safety, performance
or reliability of your vehicle. Please do not use them.
Mercedes-Benz original parts as well as conversion parts and accessories approved by us are available
at your authorized Mercedes-Benz Center where you will receive comprehensive information, also on
permissible technical modifications, and where proper installation will be performed.
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Page 32 of 350

29 Central locking system
Technical
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Locking and unlocking with remote control
Unlocking:
Press transmit button Œ. All turn signal lamps blink
once to indicate that the vehicle is unlocked.
The remote control can be programmed for two kinds of
unlocking modes (see below):
Selective unlocking mode –
Press transmit button Œ once to unlock driver’s
door and fuel filler flap.
Press transmit button Œ twice to unlock all doors,
fuel filler flap, and trunk.
Global unlocking mode –
Press transmit button Œ once to unlock all doors,
fuel filler flap, and trunk.
Notes:
If the trunk was previously locked separately, it will
remain locked, see page 37.
The presently active unlocking mode (selective or
global) can only be determined by unlocking the vehicle
with the remote control (see below for changing mode).If within 40 seconds of unlocking with the remote
control, neither door nor trunk is opened, the electronic
key is not inserted in the steering lock, or the central
locking switch is not activated, the vehicle will
automatically lock.
Locking:
Press transmit button ‹ once. All turn signal lamps
blink three times to indicate that the vehicle is locked.
If the turn signal lamps do not blink, a door or trunk is
not closed properly.
Note:
If the vehicle cannot be locked or unlocked by pressing
the transmit button, then it may be necessary to change
the batteries in the electronic key (if ok, battery check
lamp in electronic key will light briefly when pressing
transmit button) or to synchronize the remote control,
see pages 294 and 296.
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Page 33 of 350
30 Central locking system
Technical
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Choosing global or selective mode on remote control
Press and hold transmit buttons ‹ and Œ
simultaneously for five seconds to reprogram the
remote control. Battery check lamp will blink two times
indicating the completed mode change.Opening the trunk
The trunk lid will swing open automatically. You should
always make sure there is sufficient clearance.
A minimum height clearance of 5.9 ft. (1.8 m) is
required to open the trunk lid.
Press transmit button Š until trunk lid is open.
Important!
Do not place remote control in trunk since trunk is
locked when the lid is closed if the vehicle is centrally
locked.
Note:
If the trunk was previously locked separately, it will
remain locked, see page 37.
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Page 56 of 350

53 Seats
Technical
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Multicontour seat (optional)
We recommend to adjust the multicontour seat in the
following order:
1Seat cushion depth
2Backrest bottom
3Backrest center
4Side bolster adjustmentSome models may be equipped with multicontour seats.
These seats have movable seat cushions, and inflatable
air cushions built into the backrest to provide additional
lumbar and side support.
The seat cushion movement and amount of backrest
cushion height and curvature can be continuously
varied with regulators (1, 2 and 3) after turning the
electronic key in steering lock to position 2.
The side bolsters of the backrest can be adjusted with
rocker switch (4):
•press to the right – increase side support,
•press to the left – decrease side support.
If the engine is turned off, the last cushion setting is
retained in memory, and automatically adjusts the
cushion to this setting when the engine is restarted.
1
234
P91.25-2025-26
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Page 73 of 350

70 Restraint systems
Technical
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
The following system components are monitored or
undergo a selfcheck: crash-sensor(s), airbag ignition
circuits, front seat belt buckles, emergency tensioning
retractors, seat sensor.
Initially, when the electronic key is turned from
steering lock position 0 to position 1 or 2, malfunctions
in the crash-sensors are detected and indicated (the
“SRS” indicator lamp stays on longer than 4 seconds or
does not come on).
Have the system checked at your authorized
Mercedes-Benz Center immediately.
In the operational mode, after the indicator lamp has
gone out following the initial check, interruptions or
short circuits in the airbag ignition circuit and in the
driver and front passenger seat belt buckle harnesses,
and low voltage in the entire system are detected and
indicated.Note:
See page 236 for information on the Supplemental
Restraint System (SRS) indicator lamp.
Wa r n i n g !
In the event a malfunction of the “SRS” is indicated
as outlined above, the “SRS” may not be
operational. For your safety, we strongly
recommend that you visit an authorized
Mercedes-Benz Center immediately to have the
system checked; otherwise the “SRS” may not be
activated when needed in an accident, which could
result in serious or fatal injury, or it might deploy
unexpectedly and unnecessarily which could also
result in injury.
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Page 131 of 350
128 Automatic climate control
Technical
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Display and controlsPress the desired button to activate, indicator lamp is on
while activated.
UAutomatic mode
fRaise temperature
gLower temperature
PDefrost
OAir recirculation
eActivated charcoal filter
FRear window defroster
bAir distribution, manual
SEconomy mode
ïAir volume, manual
TResidual engine heat utilization
0
MAX
P83.40-2167-26
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Page 132 of 350

129 Automatic climate control
Technical
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Basic setting - automatic mode
Press left and right U button for automatic mode.
Simultaneously press both f and g buttons for
temperature setting of 72
°F.
QAir volume and distribution are controlled
automatically.
This setting can be used all year around.
Economy
The function of this setting corresponds to the
automatic mode. However, because the air conditioning
compressor will not engage (fuel savings), it is not
possible to air condition in this setting.
Press S button to activate.
Press S button once again to return to previous
setting.Special settings
(use only for short duration)
Defogging windows
Switch off O button.
Press left and right U buttons.
Press b button repeatedly until air is directed
upward.
STurn wheels (2) to position to open left and right
defroster outlets (5).
Defrosting
Turn wheels (2) to position l to open left and right
defroster outlets (5).
Press P button. Maximum heated and automatically
controlled amount of air is directed to the windshield
and side windows.PPress P button once again to return to previous
setting.
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132 Automatic climate control
Technical
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Activated charcoal filter
An activated charcoal filter markedly reduces bad odors
and removes pollutants from the air entering the
passenger compartment.
To select, press e button.
To c a nc el, pr ess e button again.
The blower speed is slightly increased to supply a
constant volume of air.
The system switches automatically to the air
recirculation mode, if the carbon monoxide (CO) or
nitric oxide (NO
X) of the outside air increases beyond a
predetermined level.
When pressing button P or S, the filter is also
switched off.
Notes:
The automatic air recirculation does not function when
selecting the Economy mode S, or the outside
temperature is below 45
°F (7
°C).
The activated charcoal filter should be switched off
when windows fog up on the inside, or if the passenger
compartment needs to be quickly heated or cooled
down.Residual engine heat utilization
With the engine switched off, it is possible to continue
heating the interior for a short while.
Air volume and distribution are controlled
automatically.
To s e l e c t :
Turn electronic key in steering lock to position 1 or 0 or
remove electronic key. Close air outlet in rear
passenger compartment.
Press T button.
This function selection will not activate if the battery
charge level is insufficient.
To c a n c e l :
Press T button.
The system will automatically shut off
•If you turn electronic key in steering lock to
position 2,
•after approximately 30 minutes,
•if the battery voltage drops.
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