Page 31 of 317

28 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Locking:
Press transmit button ‹ once. All turn signal lamps 
blink three times to indicate that the vehicle is locked 
and the antitheft alarm is activated.
Notes:
If the turn signal lamps do not blink three times when 
locking the vehicle, a door, the liftgate, or the hood is 
not properly closed. Close the respective element and 
lock the vehicle again with the remote control.
If the vehicle cannot be locked or unlocked by pressing 
the transmit button, then it may be necessary to change 
the batteries in the remote control or to synchronize the 
remote control, see page 270 and page 271.
Unlocking the liftgate
Press transmit button Š to unlock the liftgate. This 
also deactivates the antitheft alarm.
Important!
A minimum height clearance of 7 ft. (2.15 m) is 
required to open the liftgate.Panic button
To activate press and hold button (1) for at least one 
second. An audible alarm and blinking turn signal 
lamps will operate for approximately 3 minutes. 
Additionally the interior lights switch on automatically 
for approximately 3 minutes.
To deactivate press button (1) again, or press transmit 
button‹, ŒorŠ on the remote control, or 
turn key in steering lock to position 1. 
     
        
        Page 41 of 317

38 Seats
Te ch n ica 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 56 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 can 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 the 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 42 of 317
39 Seats
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Manual seats (ML 320)
We recommend to adjust the manual seat in the 
following order:
1Seat, fore / aft
Lift handle (1), slide seat to desired position and 
allow handle to reengage. Check for proper 
engagement before driving. The position should be 
as far rearward as possible, consistent with ability to 
properly operate controls.2Seat cushion inclination adjustment
Raise lever (2), move seat cushion to desired 
position. Release lever.
3Backrest adjustment
Turn handwheel (3).
4Head restraint height
Raising: 
Pull up on head restraint.
Lowering: 
Push button (4), located at top of seat back, and 
push down on head restraint.
Adjust head restraint to support the back of the head 
approximately at ear level. The head restraint angle 
can also be adjusted manually.
See page 43 for removing head restraints. 
     
        
        Page 52 of 317
49 Restraint systems
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Tighten the lap portion to a snug fit by pulling shoulder 
portion up.
The shoulder portion of the seat belt must be pulled 
snug and checked for snugness immediately after 
engaging it.
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). For this purpose, you can 
adjust the height of the belt outlet. Three positions are 
available.4Button for belt outlet height adjustment
To raise, slide belt height adjustment upward.
To lower, press button (4) and slide belt outlet 
downward.
Caution!
For safety reasons, avoid adjusting the seat or backrest 
into positions which could affect the correct seat belt 
positioning. 
     
        
        Page 119 of 317
116 Interior equipment
Te ch n ica l
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and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Storage compartment under front passenger seat 
(standard; optional on model ML 320)
The storage compartment under the front passenger 
seat is lockable with its separate key (1).
Note:
Slide seat rearward to gain easier access to the storage 
compartment.Cup holder in instrument panel
Touch top of cover. The cup holder (1) opens 
automatically.
Caution!
Keep cup holder closed while traveling. Place only 
containers that fit into the cup holder to prevent spills. 
Do not fill containers to a height where the contents 
could spill during vehicle maneuvers, especially hot 
liquids. 
     
        
        Page 120 of 317
117 Interior equipment
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Cup holder in rear center console
To open cup holder (2), pull down at top of cover.
Caution!
Keep cup holder closed while traveling. Place only 
containers that fit into the cup holder to prevent spills.
Do not fill containers to a height where the contents 
could spill during vehicle maneuvers, especially hot 
liquids.Armrest in rear bench seat
Pull down armrest (1) by its top. 
     
        
        Page 234 of 317
231 Engine compartment
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index Hood
To  o pen :
To unlock the hood, pull release lever (1) under the 
driver’s side of the instrument panel. At the same time a 
handle (2) will extend out of the radiator grill (it may be 
necessary to lift the hood up slightly).
Caution!
To avoid damage to the windshield wipers or hood, open 
the hood only with wipers in the parked position.Pull handle (2) to its stop out of radiator grill and open 
hood (do not pull up on handle).
To  c l o s e :
Lower hood and let it drop into lock from a height of 
approximately 1 ft. (30 cm).
To avoid hood damage, please make sure that hood is 
fully closed. If not, repeat closing procedure. Do not 
push down on hood to attempt to fully close it. 
     
        
        Page 294 of 317
291 Technical data
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index Main dimensions
Model ML 320 ML 430 ML 55 AMG
Overall vehicle length 180.6 in (4587 mm) 180.6 in (4587 mm) 182.5 in (4635 mm)
Overall vehicle width 86.2 in (2190 mm) 86.2 in (2190 mm) 86.2 in (2190 mm)
Overall height 71.6 in (1820 mm) 71.6 in (1820 mm) 71.0 in (1804 mm)
Wheel base 111.0 in (2820 mm) 111.0 in (2820 mm) 111.0 in (2820 mm)
Track, front 60.4 in (1535 mm) 61.2 in (1555 mm) 61.2 in (1555 mm)
Track, rear 60.4 in (1535 mm) 61.2 in (1555 mm) 61.2 in (1555 mm)