
28 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Start lock-out
Important!
Removing the electronic key from the starter switch 
activates the start lock-out. The engine cannot be 
started.
Inserting the electronic key in the starter switch 
deactivates the start lock-out.
Note:
In case the engine cannot be started (vehicle’s battery is 
in order), the system is not operational. Contact an 
authorized Mercedes-Benz Light Truck Center or call 
1-800-FOR-MERCedes (in the USA), or 1-800-387-0100 
(in Canada).General notes on the central locking system
If the electronic key is inserted in the starter switch, the 
vehicle cannot be locked or unlocked with the remote 
control.
If the vehicle cannot be locked or unlocked:
•Check the batteries of the electronic key, see 
page 343, or synchronize the electronic key, see 
page 345.
•Use the mechanical key to unlock the vehicle. To 
start engine, insert the electronic key in the starter 
switch. There could be a slight delay until the 
electronic key can be turned in the starter switch.
Important!
When unlocking the driver’s door with the mechanical 
key, the exterior lamps will flash and the alarm will 
sound.
To cancel the alarm, insert the electronic key in the 
starter switch or press buttonŒ or‹ on the 
electronic key.
J_G463.book Seite 28 Mittwoch, 19. September 2001 8:06 08 

31 Central locking system
Te ch n i c a l
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 once to unlock driver’s door 
and fuel filler flap.
Press transmit button Œ twice to unlock all doors, 
fuel filler flap, and tailgate.
Global unlocking mode –
Press transmit button Œ once to unlock all doors, 
fuel filler flap, and tailgate.
Notes:
If the tailgate was previously locked separately, it will 
remain locked, see page 39.
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 or tailgate is opened, the electronic 
key is not inserted in the starter switch, 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 the tailgate 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 343 and 345.
Choosing global or selective mode on remote control
Press and hold transmit buttons‹ andŒ 
simultaneously for 6 seconds to reprogram the remote 
control. Battery check lamp will blink two times 
indicating the completed mode change.
J_G463.book Seite 31 Mittwoch, 19. September 2001 8:06 08 

32 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Opening and closing windows and sliding / pop-up 
roof from outside 
(summer opening / convenience feature)
Aim transmitter eye of remote control at the driver’s 
door receiver.
Summer opening:
The sliding / pop-up roof and all side windows can be 
opened automatically.
Continue to press transmit button Œ after unlocking 
the vehicle.
The windows and sliding/pop-up roof begin to open 
after approximately 1 second.
To interrupt opening procedure, release transmit 
button.
Convenience feature:
The sliding / pop-up roof and the side windows can be 
closed.
Continue to press transmit button ‹ after locking 
the vehicle.
The windows and sliding / pop-up roof begin to close 
after approximately 1 second.To interrupt closing procedure, release transmit button.
Ensure that all side windows and the sliding / pop-up 
roof are properly closed before leaving the vehicle.
Note:
If the windows and sliding / pop-up roof cannot be 
operated automatically by pressing the transmit button 
of t he r emo te c ontr ol then  it m ay  be n ece ssar y to chan ge 
the batteries in the electronic key (if ok, battery check 
lamp in electronic key will light briefly when 
transmitting), or to synchronize the remote control, see 
page 343 and 345.
Wa r n i n g !
Never operate the windows or sliding / pop-up roof 
if there is the possibility of anyone being harmed 
by the opening or closing procedure.In case the procedure causes potential danger, the 
procedure can be immediately halted by releasing 
the remote control button. To reverse direction of 
movement press Œ for opening or ‹ for 
closing.
J_G463.book Seite 32 Mittwoch, 19. September 2001 8:06 08 

47 Seats
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Adjust the head restraint angle by hand. Push or pull 
the head restraint in direction of arrow.
For notes on inside rear view mirrors adjustment, see 
page 79;
For exterior rear view mirrors adjustment, see page 80 
and for steering wheel adjustment, see page 78.Synchronizing head restraints and 
seat adjustment fore, aft
If the power supply was interrupted (battery 
disconnected or empty), the head restraints and the seat 
adjustment fore, aft are no longer adjusted 
automatically.
To resynchronize the adjustment feature, turn 
electronic key in starter switch to position 2, move the 
seat completely forward and the head restraint fully 
down.
To recall the desired seat position push and hold 
position button (2 ) un til t he  ad justm ent has  stop ped , see  
page 48 for notes on the memory function.
Caution!
Do not remove head restraints except when mounting 
seat covers. For removal refer to head restraints, front 
on page 51. Whenever restraints have been removed be 
sure to reinstall them before driving.
P91.10-2360-26
J_G463.book Seite 47 Mittwoch, 19. September 2001 8:06 08 

320 Battery
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
The service life of the battery is dependent on its 
condition of charge. The battery should always be kept 
sufficiently charged, in order to last an optimum length 
of time.
Therefore, we strongly recommend that you have the 
battery charge checked frequently, and corrected if 
necessary, especially if you use the vehicle less than 
approximately 200 miles (300 km) per month, 
mostly for short distance trips, or if it is not used for 
long periods of time.
Only charge a battery with a battery charger after the 
battery has been disconnected from the vehicle’s 
electrical circuit.
Always disconnect the battery negative lead first and 
connect last.
When removing and connecting the battery, always 
make sure that all electrical consumers are off and the 
key is in starter switch position 0. The battery must 
always be securely installed when the vehicle is in 
operation. During removal and installation always 
protect the disconnected battery positive (+) terminal 
with the cover attached to the battery.While t he en gin e is run ning t he batter y te rm in al clamp s 
must not be loosened or detached, otherwise the 
generator and other electronic components would be 
damaged.
Note:
The gear selector lever will remain locked in 
position “P” and the electronic key can not be turned in 
the starter switch, if the vehicle battery is disconnected 
or discharged.
After reconnecting the battery also set the clock (see 
COMAND operator’s manual), synchronize the 
electronic stability program (ESP) (see page 244) and 
the front seat head restraints (see page 47).
Battery recycling
Batteries contain material that can harm the 
environment with improper disposal.
Large 12 Volt storage batteries contain lead.
Recycling of batteries is the preferred method of 
disposal.
Many states require sellers of batteries to accept old 
batteries for recycling.
J_G463.book Seite 320 Mittwoch, 19. September 2001 8:06 08 

345 Electronic main key
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index Important!
Batteries contain materials that can harm the 
environment if disposed of improperly. Recycling of 
batteries is the preferred method of disposal. For 
disposal, please follow manufacturer’s recommendation 
on battery package.
Replacement Battery: 
Lithium, type CR 2025 or equivalent.Synchronizing remote control 
The remote control may have to be resynchronized, if 
the vehicle cannot be locked or unlocked.
To synchronize insert electronic key in starter switch.
The remote control should once again be operational.
J_G463.book Seite 345 Mittwoch, 19. September 2001 8:06 08