Page 34 of 317

31 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Each individual door and the liftgate must be locked 
with the respective door lock button – the driver’s door 
can only be locked when it is closed.
Notes:
The alarm sounds when unlocking the driver’s door. 
Cancel alarm by turning key in steering lock to 
position 1, or with the remote control by pressing 
buttonŒ.
If the vehicle has previously been locked from the 
outside, only the door being opened from the inside will 
unlock, and the alarm will come on. The remaining 
doors, the liftgate and fuel filler flap remain locked.
In case of a malfunction in the central locking system 
the doors can be locked and unlocked individually.To lock, push down lock buttons and turn mechanical 
key in driver’s door lock to position 3. In addition lock 
the liftgate.
To unlock, pull inside door handles and turn mechanical 
key in driver’s door lock to position 2.
Rear doors, previously centrally locked, can be opened 
from inside by first unlocking the vehicle with the 
central locking switch, see page 32, or by first pulling 
up the door lock button.
If the fuel filler flap cannot be opened, see page 274. 
     
        
        Page 45 of 317

42 Seats
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Memory storing and recalling 
(optional on model ML 320 and ML 430)
5Memory button
6Position buttonsStoring
Three sets of seat positions may be programmed into 
memory. After the seat is positioned, push memory 
button (5), release, and within 3 seconds push position 
button “1”. A second and third set of positions for the 
same seat can be programmed into memory by pushing 
first memory button (5) and then position button “2”, 
respectively “3”.
Recalling
To recall a seat position, push and hold one of the 
position buttons “1”, “2” or “3” until seat movement has 
stopped. The seat movement stops when the respective 
position button is released.
Caution!
Do not operate the power seats using the memory 
button if the seat backrest is in an excessively reclined 
position. Doing so could cause damage to front or rear 
seats.
First move the backrest to an upright position. 
     
        
        Page 124 of 317
121 Interior equipment
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index 5. Pull lock button (2) up, and fold seat back forward 
until it locks in place.
The red backrest lock indicators at the lock 
buttons (2) are not visible in locked position.6. Press lock button (3) to unlock lever (4). Pull 
lever (4) in direction of arrow (5), then pull lever (1) 
and push down seat bench section until it locks in 
place. 
     
        
        Page 125 of 317
122 Interior equipment
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
To return seat bench section to sitting position:
1. Pull lever (1) and raise seat bench section until it 
locks in place.
2. Pull lock button (2) up, and unfold seat back to 
upright position. Check for secure locking by 
pushing and pulling on the backrest. The red 
backrest lock indicators at the lock buttons (2) are 
not visible in locked position.
3. Pull lever (1) in direction of arrow, and slide seat 
bench section rearward to desired position.4. Install and adjust head restraint.
For installation of head restraints see page 124.
Wa r n i n g !
Failure to assure that seats are locked into place 
could result in an increased chance of injury in an 
accident.Never place hands under seat or near any moving 
parts while a seat is being adjusted. 
     
        
        Page 126 of 317

123 Interior equipment
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Easy entry/exit feature 
(only in vehicles with third row seats)
Folding right seat bench section for access to rear 
compartment area:
1. Move right front seat forward.
2. Slide seat bench section forward.
3. Push head restraint fully down and tilt it forward, 
see page 43.4. Pull lock button (2) of seat back up, and fold seat 
back forward.
5. Remove respective cargo floor plate, see page 129.
6. Pull lever (6) up, and fold seat bench section 
forward.
Resetting seat bench:
1. Pull down on seat bench section until it locks into 
place.
2. Pull lock button (2) up, and unfold seat back to 
upright position. Check for secure locking by 
pushing and pulling on the backrest. The backrest 
lock indicators at the lock buttons (2) are not visible 
in locked position.
3. Pull up and adjust head restraint.
Caution!
Never drive with the second row right seat folded 
forward (easy entry/exit feature). It could open and fold 
back unintentionally.
When unfolding the seat, be sure that there is no danger 
of anyone being harmed by the procedure. 
     
        
        Page 144 of 317

141 Garage door opener
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index For operation in the USA only: This device complies 
with Part 15, Subpart C, Section 209 of the FCC Rules. 
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and 
(2) this device must accept any interference received, 
including interference that may cause undesired 
operation.
WARNING: Changes or modification not expressly 
approved by party responsible for compliance could void 
the user’s authority to operate the equipment.
Programming or reprogramming the integrated 
remote control:
1. Turn key in steering lock to position 1 or 2.
2. Hold the end of the hand-held transmitter of the 
device you wish to train approximately 2 to 5 inches 
(5 cm to 12 cm) away from the surface of the 
integrated remote control located on the overhead 
console, keeping the indicator lamp in view.3. Using both hands, simultaneously push the hand-
held transmitter button and the desired integrated 
remote control button. Do not release the buttons 
until completing step 4.
4. The indicator lamp on the integrated remote control 
will flash, first slowly and then rapidly. When the 
indicator lamp flashes rapidly, both buttons may be 
released (the rapid flashing lamp indicates 
successful programming of the new frequency 
signal). To program the remaining two buttons, 
follow  ste ps 1 through 4.
Note: 
If after repeated attempts, you do not successfully 
program the integrated remote control device to learn 
the signal of the hand-held transmitter, the garage door 
opener could be equipped with the “rolling code 
feature”. 
     
        
        Page 146 of 317
143 Garage door opener
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Operation of remote control:
1. Turn key in steering lock to position 1 or 2.
2. Select and press the appropriate button to activate 
the remote controlled device. The integrated remote 
control transmitter continues to send the signal as 
long as the button is pressed – up to 20 seconds.Erasing the remote control memory:
1. Turn key in steering lock to position 1 or 2.
2. Simultaneously holding down the left and right side 
buttons for approximately 20 seconds, or until the 
control lamp blinks rapidly, will erase the codes of 
all three channels. 
     
        
        Page 159 of 317

156 Tele Aid
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Important!
If the indicator lamps do not start flashing after 
pressing one of the buttons or remain illuminated (in 
red) at any time, the Tele Aid system has detected a fault 
or the service is not currently active, and may not 
initiate a call. Visit your Mercedes-Benz Light Truck 
Center and have the system checked or contact the 
Response Center at 1-800-756-9018 (in the USA) or 
1-888-923-8367 (in Canada) as soon as possible.Upgrade Signals
Tele Aid system processes calls using the following 
priority.
•Automatic emergency – First priority
•Manual emergency – Second priority
•Roadside assistance – Third priority
•Information – Fourth priority
Should a higher priority call be initiated while you are 
connected, an upgrade (alternating) tone will be heard, 
and the appropriate indicator lamp will flash. If certain 
information such as vehicle identification number or 
client information is not available, the operator may 
need to retransmit. During this time you will hear a 
chirp and voice contact will be interrupted. Voice 
contact will resume once the retransmission is 
completed. Once a call is concluded, a chirp will be 
heard and the appropriate indicator lamp will stop 
flashing. The MCS system operation will resume.