Page 122 of 521

121 Controls in detail
Locking and unlocking
1Remote trunk switch with indicator 
lamp (vehicles with trunk open-
ing/closing system*)
Pull remote trunk switch1 until the 
trunk begins to open. 
The trunk opens. The indicator lamp in 
the switch comes on and remains lit 
until the trunk is closed.
Closing the trunk
Closing the trunk from the inside auto-
matically*
In vehicles with trunk opening/closing sys-
tem* you can close the trunk from the in-
side using the remote trunk switch.
Press remote trunk switch 
(page 121) until the indicator lamp in 
the switch goes out and the trunk is 
closed.
To interrupt the closing procedure:
Release the remote trunk switch.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is 
sufficient overhead clearance.
Vehicles with trunk opening/closing 
system*: To stop the opening proce-
dure, press or pull remote trunk 
switch1.iIf the trunk does not open, it is still 
locked separately (
page 128).
iThe trunk can also be opened using 
button Š on the SmartKey or 
SmartKey with KEYLESS-GO* or from 
its inside in an emergency, see “Trunk 
lid emergency release” (
page 127).
iYou can also close the trunk by hand.
 
         
        
        
     
        
        Page 127 of 521

126 Controls in detailLocking and unlockingClosing the trunk and locking the vehi-
cle from the outside (vehicles with 
KEYLESS-GO*)
In vehicles with trunk opening/closing sys-
tem* and KEYLESS-GO, you can close the 
trunk and lock the vehicle simultaneously 
from the outside using the KEYLESS-GO 
locking/closing switch.
1KEYLESS-GO locking/closing switch
You can close the trunk and lock the vehi-
cle simultaneously.
Make sure you have the SmartKey with 
KEYLESS-GO with you.
Press switch1 briefly.
The trunk closes.
All turn signal lamps flash three 
times.
The locking knobs in the doors 
move down.
The anti-theft alarm system is 
armed.
If the trunk lid comes into contact with an 
object while closing (e.g. luggage that has 
been piled too high), the closing procedure 
is stopped and the trunk reopens slightly.
iYou can also close the trunk by hand.iTo prevent a possible inadvertent lock-
out, the trunk will open automatically if 
a SmartKey with KEYLESS-GO is recog-
nized inside the vehicle or in the trunk.
Warning!
G
Monitor the closing procedure carefully to 
make sure no one is in danger of being in-
jured. To prevent possible personal injury, 
always keep hands and fingers away from 
the trunk opening when closing the trunk. 
Be especially careful when small children 
are around. To stop the closing procedure, 
do one of the following: 
press KEYLESS-GO locking/closing 
switch1 (
page 126)
press trunk closing switch (
page 124)
press button Š on the SmartKey with 
KEYLESS-GO
press the remote trunk switch (on the 
driver’s door) (
page 120) 
         
        
        
     
        
        Page 130 of 521

129 Controls in detail
Locking and unlocking
Automatic central locking
The doors and the trunk automatically lock 
when the ignition is switched on and the 
wheels are turning at vehicle speeds of ap-
proximately 9mph (15km/h) or more.
You can open a locked door from the in-
side. Open door only when conditions are 
safe to do so.For more information on towing the vehi-
cle, see the “Practical hints” section 
(
page 457).
You can deactivate the automatic locking 
mode using the control system 
(page 174).
Locking and unlocking from the inside
You can lock or unlock the doors and the 
trunk from inside using the central locking 
switch. This can be useful, for example, if 
you want to lock the vehicle before starting 
to drive.
The fuel filler flap cannot be locked or un-
locked with the central locking switch.
iThe doors unlock automatically after an 
accident if the force of the impact ex-
ceeds a preset threshold.
The vehicle automatically locks when 
the ignition is switched on and the 
wheels are turning at vehicle speeds of 
approximately 9 mph (15 km/h) or 
more. You could therefore lock yourself 
out when the vehicle
is pushed or towed
is on a test stand
Warning!
G
When leaving the vehicle, always remove the 
SmartKey or the SmartKey with 
KEYLESS-GO* from the starter switch, take 
it with you, and lock the vehicle. Do not 
leave children unattended in the vehicle, or 
with access to an unlocked vehicle. Unsu-
pervised use of vehicle equipment may 
cause an accident and/or serious personal 
injury. 
         
        
        
     
        
        Page 136 of 521

135 Controls in detailSeats
Drive-dynamic features
Activating
Press button4 (
page 134).
The indicator lamp on the button 
comes on and the following display ap-
pears in the multifunction display for 
about 5 seconds.
Deactivating
Press button4 (
page 134) again.
The indicator lamp on the button goes 
out.Massage function (PULSE)
The massage function can help prevent 
muscle tension during long drives.
Press button6 (
page 134).
The indicator lamp on the button 
comes on. The air cushions in the lum-
bar area pulsate.
Seat heating*
Both switches for the front seats are locat-
ed in the center console. The red indicator 
lamps in the switch come on to show 
which heating level you have selected:
iYou can adjust the characteristics of 
the Drive - Dynamic seat using the con-
trol system (
page 177).
iWhen the engine is turned off, the last 
cushion setting is retained in memory. 
The cushion is automatically adjusted 
to this setting when the engine is re-
started.iThe massage function turns off auto-
matically after approximately 
5 minutes.
Level3
Three indicator lamps on 
(highest level)
The seat heating automatically 
switches to level2 after approxi-
mately 5 minutes.
2
Two indicator lamps on
The seat heating automatically 
switches to level1 after approxi-
mately 10 minutes.
1
One indicator lamp on 
(lowest level)
The seat heating automatically 
switches off after approximately 
20 minutes.
off
No indicator lamp on 
         
        
        
     
        
        Page 139 of 521

138 Controls in detailMemory functionPrior to operating the vehicle, the driver 
should check and adjust the seat height, 
seat position fore and aft, and seat back-
rest angle if necessary, to ensure adequate 
control, reach and comfort. The head re-
straint should also be adjusted for proper 
height. See also the section on air bags 
(page 67) for more information on prop-
er seat positioning.
In addition, adjust the steering wheel to 
ensure adequate control, reach, operation 
and comfort. Both the interior and exterior 
rear view mirrors should be adjusted for 
adequate rear vision.
Fasten seat belts. Infants and small chil-
dren should be seated in a properly se-
cured restraint system that complies with 
U.S. Federal Motor Vehicle Safety Stan-
dards 213 and 225 and Canadian Motor 
Vehicle Safety Standards 213 and 210.2.The following settings are stored when us-
ing the buttons on the driver’s door:
Driver’s seat, backrest, head restraint 
position and settings for multicontour 
seat
Steering wheel position
Exterior rear view mirror positions
The following settings are stored when us-
ing the buttons on the front passenger 
door:
Front passenger seat, backrest, head 
restraint position and settings for mul-
ticontour seat
Warning!
G
Do not activate the memory function while 
driving. Activating the memory function 
while driving could cause the driver to lose 
control of the vehicle. 
         
        
        
     
        
        Page 143 of 521

142 Controls in detailLightingManual headlamp mode
The low beam headlamps and the parking 
lamps can be switched on and off with the 
exterior lamp switch.
Automatic headlamp mode
The following lamps switch on and off au-
tomatically depending on the brightness of 
the ambient light:
Low beam headlamps
Tail and parking lamps
License plate lamps 
Side marker lamps
Turn exterior lamp switch to 
positionU.
With the SmartKey in starter switch 
position1 or the KEYLESS-GO* start/stop 
button pressed once, only the parking 
lamps will switch on and off automatically.When the engine is running, the low beam 
headlamps, the tail and parking lamps, the 
license plate lamps, and the side marker 
lamps will switch on and off automatically.
Daytime running lamp mode
Turn the exterior lamp switch to 
positionM orU.
When the engine is running, the low 
beam headlamps are automatically 
switched on.
In low ambient light conditions, the fol-
lowing lamps will switch on additional-
ly:
Tail and parking lamps
License plate lamps
Side marker lamps
For nighttime driving you should turn the 
exterior lamp switch to positionB to 
permit activation of the high beam head-
lamps.
Warning!
G
If the exterior lamp switch is set toU,
the headlamps may switch off unexpect-
edly when the system senses bright am-
bient light, for example light from 
oncoming traffic. 
the headlamps will not be automatically 
switched on under foggy conditions. 
To minimize risk to you and to others, acti-
vate headlamps by turning exterior lamp 
switch to B when driving or when traffic 
and/or ambient lighting conditions require 
you to do so.
In low ambient lighting conditions, only 
switch from position U to B with the 
vehicle at a standstill in a safe location. 
Switching from U to B will briefly 
switch off the headlamps. Doing so while 
driving in low ambient lighting conditions 
may result in an accident.
The automatic headlamp feature is only an 
aid to the driver. The driver is responsible for 
the operation of the vehicle’s lights at all 
times. 
         
        
        
     
        
        Page 144 of 521

143 Controls in detail
Lighting
Canada only:
The daytime running lamp mode is manda-
tory and therefore in a constant mode.
When the engine is running, and you shift 
from a driving position to positionN orP, 
the low beam headlamps will switch off 
with a three-minute delay.
When the engine is running, and you
turn the exterior lamp switch to 
positionC, the parking lamps 
switch on additionally.
turn the exterior lamp switch to 
positionB, the manual headlamp 
mode has priority over the daytime run-
ning lamp mode.
The corresponding exterior lamps 
switch on (
page 54).USA only:
By default, the daytime running lamp mode 
is deactivated. Activate the daytime run-
ning lamp mode using the control system, 
see “Setting daytime running lamp mode 
(USA only)” (
page 170).
When the engine is running, and you turn 
the exterior lamp switch to 
positionCorB, the manual head-
lamp mode has priority over the daytime 
running lamp mode.
The corresponding exterior lamps switch 
on (
page 54).
iWith the daytime running lamp mode 
activated and the exterior lamp switch 
in positionM, the high beam head-
lamps cannot be switched on.
The high beam flasher is available at all 
times. 
         
        
        
     
        
        Page 150 of 521
149 Controls in detail
Lighting
Interior lighting in the rear
The overhead control panel is located 
above the rear seat bench.
1Ambient lighting switch, to brighten
2Rear reading lamp
3Rear reading lamp on/off
4Rear interior lamp
5Ambient lighting
6Ambient lighting switch, to dimRear reading lamps
Press respective rear reading lamp 
switch3 to switch on the correspond-
ing rear reading lamp.
Press respective rear reading lamp 
switch3 again to switch off the corre-
sponding rear reading lamp.
Ambient lighting
Press ambient lighting switch1or6 
repeatedly until ambient lighting5 
has reached the desired intensity.
You can switch the ambient lighting on and 
off, using the Control system 
(
page 172).
Trunk lamp
The trunk lamp switches on if the trunk is 
opened.
If the trunk remains open, the trunk lamp 
switches off automatically after approxi-
mately 10 minutes.