Page 10 of 346

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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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  o nce  to un lock  dr iver’s  d oor 
and fuel filler flap.
Press transmit button Œ twice to unlock both doors, 
fuel filler flap, and trunk.
Global unlocking mode –
Press transmit button Œ  once to unlock both 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 they do not blink three times, a door or trunk is not 
properly closed.
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 288 and 290.
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        Page 33 of 346
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 approx. 6 seconds to reprogram the 
remote control. Battery check lamp will blink two times 
indicating the completed mode change.
Opening the trunk
Press transmit buttonŠ until trunk lid is released.
A minimum height clearance of 5.9 ft. (1.8 m) is 
required to open the trunk lid.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 58 of 346

55 Seats
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Multicontour seat 
(optional; standard on model CLK 55 AMG)
Some 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.We recommend to adjust the multicontour seat in the 
following order:
1Seat cushion depth 
Slide the switch fore or aft until your legs are 
supported comfortably.
2Backrest bottom
3Backrest center
4Side bolster adjustment 
Adjust the side bolster to provide good lateral 
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
2
3
4
P91.25-2063-26
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        Page 72 of 346

69 Restraint systems
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Initially, when the electronic key is turned from steering 
lock position 0 to positions 1 or 2, malfunctions in the 
crash-sensor 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.Front airbags
The driver and front passenger front airbags are 
designed to activate only in certain frontal impacts 
exceeding a preset threshold.
The front passenger airbag deploys only if the front 
passenger seat is occupied and the indicator lamp on 
the center console is not illuminated.
Note:
Heavy objects on the front passenger seat can appear to 
the “SRS” to indicate the presence of an occupant in 
that seat which causes the passenger front airbag to 
deploy in a crash exceeding the appropriate threshold.
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 125 of 346
122 Automatic climate control
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Display and controls
Press the desired button to activate, indicator lamp is on 
while activated.
UAutomatic mode
fRaise temperature
gLower temperaturePDefrost
OAir recirculation
FRear window defroster
bAir distribution, manual
SEconomy mode
ïAir volume, manual
TResidual engine heat utilization
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.
0
MAX
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123 Automatic climate control
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index 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 button b repeatedly until air is directed 
upward.
UTurn wheels (2) to position i to open left and right 
side air outlets (4). Adjust side air outlets upward.Defrosting
Turn wheels (2) to position i to open left and right 
side air outlets (4). Adjust side air outlets upward.
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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134 Audio system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Scan tuning
Press the SC key. Each strong 
receivable station on the band 
selected will be tuned in for 
8 seconds. The first scan will 
tune only the stations with a 
high signal strength. The second scan will tune every 
receivable station. By pressing either the  ,  , 
 or   buttons, or the “SC” key the scan mode 
can be cancelled.
Station memory
Ten stations can be stored in 
the AM and FM bands via the 
alpha-numeric keypad. The 
“0” button corresponds to 
location 10. Weatherband 
(WB) channels 1 to 7 can be retrieved via the alpha-
numeric keypad and are preset at the factory.Storing stations
Hold the number button down for approximately 
2 seconds. The currently displayed frequency is stored 
on the selected station button. The storage procedure is 
confirmed by a short signal tone.
Retrieving a station from memory
Press the desired station button.
Direct frequency input (AM and FM only)
Select the band. Press the 
“ button and enter the 
desired frequency using the 
alpha-numeric keypad. 
Frequencies outside of the 
frequency ranges (frequencies specified on page 133) 
will not be accepted. The frequency input mode is 
cancelled if no button is pressed within 4 seconds.
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