Page 39 of 430

36 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Opening the trunk
The trunk lid will swing open automatically. You should 
always make sure there is sufficient clearance.
A minimum height clearance of 6 ft. (1.85 m) is 
required to open the trunk lid.
Press transmit buttonŠ 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.
Notes:
If the trunk was previously locked separately, it will 
remain locked, see page 51.
Vehicles with optional remote trunk lid
opening / closing system, see page 56:
The switch operated opening/closing procedure can be 
immediately halted by pressing buttonŠ on the 
electronic key.KEYLESS-GO
Important!
For the KEYLESS-GO-system to function properly, the 
operator should observe the following:
•The driver should carry the KEYLESS-GO-card with 
him / her.
•To avoid radio transmission interference, never store 
the KEYLESS-GO-card together with other electronic 
items (e.g. cellular telephones, other KEYLESS-GO-
cards) or metallic objects (e.g. coins, metal foil).
•To lock or unlock the vehicle, the card must be 
recognized by the system as being located outside 
the vehicle. The card must be in close proximity to a 
door or the trunk lid (approx. 3 ft. [1 m]). To activate 
the start / stop button function, the KEYLESS-GO-
card must be recognized by the system as being 
located inside the vehicle.
•If the KEYLESS-GO-card is positioned farther away 
from the vehicle (e.g. inside clothing or a briefcase) 
and can no longer be recognized by the system, the 
vehicle cannot be locked or the engine started via 
the KEYLESS-GO-system. 
     
        
        Page 58 of 430

55 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Trunk lid release switch 
(Vehicles without trunk lid opening / closing system)
The switch is located on the driver’s door.The trunk lid will swing open automatically. You should 
always make sure there is sufficient clearance.
A minimum height clearance of 6 ft. (1.85 m) is 
required to open the trunk lid.
To open the trunk, the vehicle must be at standstill. Pull 
up on switch until trunk lid is open.
The indicator lamp in the switch remains on with trunk 
lid open.
Notes:
The trunk can also be opened by using the remote 
control. Press Šbutton.
The trunk lid cannot be opened by the switch or the 
remote control when previously locked separately with 
the mechanical key. To open, see page 51.
The trunk lid cannot be opened with the trunk lid 
release switch when the vehicle was previously locked 
with the remote control. To unlock vehicle with the 
remote control, see page 33. 
     
        
        Page 59 of 430

56 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Trunk lid opening / closing system (optional)
The switch is located on the driver’s door.
The trunk lid will open and close automatically. You 
should always make sure that there is sufficient 
clearance.
A minimum height clearance of 6 ft. (1.85 m) is 
required to open the trunk lid.
To open and close the trunk, the vehicle must be at 
standstill. To  o p e n  t r u n k  l i d :
Pull up on switch until trunk lid begins to open. The 
switch can now be released, the trunk lid opens 
automatically.
To interrupt the opening process, either pull up on 
switch, or push in trunk lid lock, or press buttonŠ 
on the remote control.
The indicator lamp in the switch remains on with trunk 
lid open.
To close trunk lid:
Press upper half of switch until trunk lid is closed and 
the indicator lamp in the switch goes out.
Wa r n i n g !
When closing the trunk lid, be sure that there is no 
danger of anyone being harmed by the closing 
procedure. Be especially careful when small 
children are around. Maintain sight of trunk area 
while operating the door mounted switch.To interrupt the hydraulic power closing assist 
mechanism release trunk lid release/close switch 
and pull up to open. 
     
        
        Page 61 of 430
58 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Opening height restriction of trunk lid
The trunk lid opening height can be restricted when 
transporting goods on a roof rack (e.g. presence of an 
MB sport luggage container). When activated, the trunk 
lid opens to below the roof line of the vehicle.
To a c ti va te :
Press upper half of trunk lid opening / closing switch for 
a minimum of 5 seconds.
To deactivate:
Press upper half of trunk lid opening / closing switch for 
a minimum of 5 seconds.Note:
To fully open the trunk lid while opening height 
restriction activated, deactivate it. 
     
        
        Page 69 of 430
66 Seats
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
6Head restraint
The height of the head restraint is adjusted 
automatically with the seat so that the back of the 
head is supported approximately at ear level. Adjust 
the head restraint using the switch if the preset 
position does not support the back of your head 
approximately at ear level.
For steering wheel adjustment, see page 102;
rear view mirror, see page 103;
exterior rear view mirrors, see page 104.Adjust the head restraint angle (1) by hand. Push or pull 
the head restraint in direction of arrow.
Storing seat positions
The head restraint, steering wheel and rear view mirror 
position are stored together with the seat position.
See page 108 for notes on the memory function. For 
recalling a stored seat / head restraint / steering wheel /
and rear view mirror position see page 109.
1 
     
        
        Page 70 of 430

67 Seats
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Important!
Prior to operating the vehicle, the driver should adjust 
the seat height for proper vision as well as fore/aft 
placement and backrest angle to insure adequate 
control, reach, operation, and comfort. The head 
restraint should also be adjusted for proper height. See 
also airbag section on page 91 for proper seat 
positioning.
In addition, also adjust the steering wheel to ensure 
adequate control, reach, operation, and comfort.
Both the inside and outside rear view mirrors should be 
adjusted for adequate rearward vision.
Fasten seat belts. Infants and small children should be 
seated in a properly secured restraint system that 
complies with U.S. Federal Motor Vehicle Safety 
Standard 213 and Canadian Motor Vehicle Safety 
Standard 213.
All seat, head restraint, steering wheel, and rear view 
mirror adjustments as well as fastening of seat belts 
should be done before the vehicle is put into motion.
Wa r n i n g !
Children 12 years old and under must never ride in 
the front seat, except in a Mercedes-Benz 
authorized BabySmart
TM compatible child seat, 
which operates with the BabySmart
TM system 
installed in the vehicle to deactivate the passenger-
side front airbag when it is properly installed. 
Otherwise they will be struck by the airbag when it 
inflates in a crash. If this happens, serious or fatal 
injury will result.
According to accident statistics, children are safer 
when properly restrained in the rear seating 
positions than in the front seating positions. 
Infants and small children must ride in back seats 
and be seated in an appropriate infant or child 
restraint system, which is properly secured with 
the vehicle’s seat belt, fully in accordance with the 
child seat manufacturer’s instructions.A child’s risk of serious or fatal injuries is 
significantly increased if the child restraints are 
not properly secured in the vehicle and the child is 
not properly secured in the child restraint. 
     
        
        Page 83 of 430
80 Seats
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Power seat, setting passenger seat position from rear
The switch is located on the right rear door.
1Front passenger seat adjustment
2Rear seat adjustmentTurn the electronic key in starter switch to position 1 
or 2.
Press button 1 to adjust the front passenger seat:
3Fore / aft adjustment
4Backrest tilt
5Head restraint height
6Seat, up / down
Press button 2 to adjust the rear seat. 
See page 79 for rear seat adjustment.
Note:
Setting the passenger seat position from the rear is not 
possible if you deactivate the operation of rear door 
windows, see page 186.
Do not move the front passenger seat completely 
forward if objects are stored in the parcel net in the 
front passenger-side footwell. Items in the net may be 
damaged. 
5
3
4
4
66
3
1
2
P54.00-2004-26 
     
        
        Page 88 of 430

85 Restraint systems
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Operation of seat belts
The inertia reel stops the belt from unwinding during 
sudden stops or when quickly pulling on the belt.
The locking function of the reel may be checked by 
quickly pulling out the belt.
Adjust seat belt so that shoulder portion is located as 
close as possible to the middle of your shoulder (it 
should not touch the neck). The height setting for the 
shoulder portion of the front seat belts is automatically 
adjusted by the fore / aft movement of the front seat.
Seat moved to front: Belt outlet fully lowered.
Seat moved to rear: Belt outlet fully raised.
Caution!
For safety reasons, avoid adjusting the seat or seat back 
into positions which could affect the correct seat belt 
positioning.Unfastening of  seat belts
Press release button (3) in the belt buckle (2).
Allow the retractor to completely rewind the seat belt by 
guiding the latch plate (1).