
1 Contents
IntroductionProduct information  .......................... 7
Roadside assistance ......................... 10
Where to find it  ................................ 14
Reporting Safety Defects  ................ 16Instruments and controlsInstruments and controls  ............... 18
Center console  .............................. 20
Overhead control panel  ............... 21OperationVehicle keys  ...................................... 24
Start lock-out  .................................... 25
General notes on the
central locking system  ............... 26
Central locking system  ................... 26
Radio frequency
remote control  .............................. 26
Unlocking the liftgate  .................. 28
Panic button  .................................. 28
Mechanical keys  ........................... 29Doors ................................................. 30
Central locking switch .................... 32
Automatic central locking  .......... 32
Emergency unlocking in case
of accident  ................................... 33
Liftgate .............................................. 34
Antitheft alarm system ................... 35
Tow-away alarm and
glass breakage sensor  ............... 36
Seats, front  ....................................... 37
Manual seats  ................................ 39
Power seats ................................... 40
Head restraint  ...............................41
Heated seats  ..................................... 44
Seat belts and integrated 
restraint system  .......................... 46
Seat belts  .......................................... 46
Seat belt nonusage 
warning system ............................ 47
BabySmart
TM airbag
deactivation system  ................... 53
Self-test BabySmart
TM 
without special child
seat installed  ................................ 53Supplemental restraint 
system (SRS)  ................................ 54
Emergency tensioning 
retractor (ETR) ............................. 55
Airbags .............................................. 56
Safety guidelines for the 
seat belt, emergency 
tensioning retractor
and airbag  ..................................... 63
Infant and child 
restraint systems .......................... 65
Adjustable steering wheel  .............. 70
Inside rear view mirror  .................. 71
Antiglare night position .............. 71
Exterior rear view mirrors  ............. 73
Exterior rear view mirror, 
electrically folding  ....................... 75
Instrument cluster  ........................... 76
Indicator lamps in the 
instrument cluster  ...................... 78
Trip computer  ................................... 83
Flexible service system (FSS)  ........ 87
Engine oil level indicator ................ 89
Exterior lamp switch  ....................... 90 

2 Contents
Fog lamp switch 
(except Canada) ........................... 92
Fog lamp switch 
(Canada only)  .............................. 93
Hazard warning flasher 
switch ............................................ 94
Headlamp cleaning system  ............ 94
Windshield wiper/washer 
switch ............................................ 95
Rear window wiper/washer  ........... 96
Climate control ................................. 98
Basic setting – Heater  ............... 100
Basic setting – 
Air conditioner  ........................... 100
Special setting  ............................ 101
Dust filter  .................................... 102
Air recirculation  ......................... 102
Rear window defroster  .............. 103
Power windows ............................... 104
Rear quarter windows  ................... 106
Sliding/pop-up roof  ....................... 107
Skyview Top .................................... 109
Interior lighting  ..............................110
Sun visors  ........................................113Illuminated vanity mirrors  ........... 113
Interior ............................................. 114
Storage compartments, 
armrest and cup holder  ............ 114
Glove box ...................................... 115
Armrest in rear bench seat ........... 117
Ashtrays ........................................... 118
Lighter .............................................. 119
Split rear seat bench ..................... 120
Easy entry/exit feature ............. 123
Rear seat head restraints  ......... 124
Third row seats  .............................. 126
Removable cargo floor plates  ...... 129
Enlarged cargo area  .......................131
Cargo tie-down rings  .....................132
Hooks ...............................................133
Partition net  ....................................133
Loading instructions  ......................136
Cargo area cover blind  ..................137
Telephone, general  .........................139
Cellular telephone  ..........................139
Garage door opener ....................... 140
DrivingControl and operation of 
radio transmitters  ..................... 146
The first 1 000 miles 
(1 500 km)  ................................. 147
Maintenance ................................... 147
Tele Aid  ........................................... 148
Catalytic converter  ........................ 160
Emission control  ............................ 161
Steering lock  ................................... 162
Starting and turning off 
the engine  .................................. 164
Automatic transmission  ............... 165
Parking brake  ................................. 173
Driving instructions  ...................... 174
Drive sensibly – save fuel  ......... 174
Drinking and driving ................. 174
Pedals ........................................... 174
Power assistance  ........................ 175
Brakes .......................................... 175
Driving off  ................................... 176
Parking ........................................ 176
Tires ............................................. 177 

22 Contents - Operation
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
OperationVehicle keys  ...................................... 24
Start lock-out  .................................... 25
General notes on the
central locking system  ............... 26
Central locking system  ................... 26
Radio frequency
remote control  .............................. 26
Unlocking the liftgate  .................. 28
Panic button  .................................. 28
Mechanical keys  ........................... 29
Doors .................................................. 30
Central locking switch  .................... 32
Automatic central locking  .......... 32
Emergency unlocking in case
of accident  .................................... 33
Liftgate ............................................... 34
Antitheft alarm system  ................... 35
Tow - aw ay  a lar m  a n d
glass breakage sensor  ................ 36
Seats, front ........................................ 37
Manual seats ................................. 39
Power seats  ................................... 40Head restraint  ...............................41
Heated seats  ..................................... 44
Seat belts and integrated 
restraint system  .......................... 46
Seat belts  .......................................... 46
Seat belt nonusage 
warning system ............................ 47
BabySmart
TM airbag
deactivation system  ................... 53
Self-test BabySmart
TM 
without special child
seat installed  ................................ 53
Supplemental restraint 
system (SRS)  ............................... 54
Emergency tensioning 
retractor (ETR)  ............................ 55
Airbags .............................................. 56
Safety guidelines for the 
seat belt, emergency 
tensioning retractor
and airbag ..................................... 63
Infant and child 
restraint systems  ......................... 65
Adjustable steering wheel .............. 70
Inside rear view mirror  ...................71Antiglare night position .............. 71
Exterior rear view mirrors  ............. 73
Exterior rear view mirror, 
electrically folding  ....................... 75
Instrument cluster  ........................... 76
Indicator lamps in the 
instrument cluster  ...................... 78
Trip computer  ................................... 83
Flexible service system (FSS)  ........ 87
Engine oil level indicator ................ 89
Exterior lamp switch  ....................... 90
Fo g la mp sw itch 
(except Canada)  .......................... 92
Fo g la mp sw itch 
(Canada only)  .............................. 93
Hazard warning flasher 
switch ............................................ 94
Headlamp cleaning system  ............ 94
Windshield wiper/washer 
switch ............................................ 95
Rear window wiper/washer  ........... 96
Climate control ................................. 98
Basic setting – Heater  ............... 100 

23 Contents - Operation
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Basic setting – 
Air conditioner  ........................... 100
Special setting  ............................ 101
Dust filter  .................................... 102
Air recirculation  ......................... 102
Rear window defroster  .............. 103
Power windows ............................... 104
Rear quarter windows  ................... 106
Sliding/pop-up roof  ....................... 107
Skyview Top .................................... 109
Interior lighting  ..............................110
Sun visors  ........................................113Illuminated vanity mirrors  ........... 113
Interior ............................................. 114
Storage compartments, 
armrest and cup holder  ............ 114
Glove box ...................................... 115
Armrest in rear bench seat ........... 117
Ashtrays ........................................... 118
Lighter .............................................. 119
Split rear seat bench ..................... 120
Easy entry/exit feature ............. 123
Rear seat head restraints  ......... 124
Third row seats  .............................. 126Removable cargo floor plates  ....... 129
Enlarged cargo area  ....................... 131
Cargo tie-down rings  ..................... 132
Hooks ............................................... 133
Partition net  .................................... 133
Loading instructions  ..................... 136
Cargo area cover blind  .................. 137
Telephone, general  ........................ 139
Cellular telephone  ......................... 139
Garage door opener  ....................... 140 

37 Seats
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Seats, front
Caution!
Do not remove head restraints except when mounting 
seat covers. For removal see page 43. Whenever head 
restraints have been removed be sure to reinstall them 
before driving.
Wa r n i n g !
Do not adjust the driver’s seat while driving. 
Adjusting the seat while driving could cause the 
driver to lose control of the vehicle.Never ride in a moving vehicle with the backrest 
reclined. Sitting in an excessively reclined position 
can be dangerous. You could slide under the seat 
belt in a collision. If you slide under it, the belt 
would apply force at the abdomen or neck. That 
could cause serious or even fatal injuries. The 
backrest and seat belt provide the best restraint 
when the wearer is in an upright position and the 
belt is properly positioned on the body.Never place hands under seat or near any moving 
parts while a seat is being adjusted.
Wa r n i n g !
When leaving the vehicle always remove the key 
from the steering lock, and lock your vehicle.Do not leave children unattended in the vehicle or 
with access to an unlocked vehicle. Unsupervised 
use of vehicle equipment may cause serious 
personal injury. 

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. 

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. 

40 Seats
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Power seats (standard; optional on model ML 320)
The slide switches are located on the entry side of each 
front seat base.
Turn key in steering lock to position 1 or 2 (with the 
driver’s or passenger’s door open, the power seats can 
also be operated with the key removed or in steering 
lock position 0).We recommend to adjust the power seat in the following 
order:
1Seat, up / down
Press the switch (up/down direction) until 
comfortable seating position with still sufficient 
headroom is reached.
2Seat adjustment, fore / aft
Press the switch (fore / aft direction) until a 
comfortable seating position is reached that still 
allows you to reach the accelerator / brake pedal 
safely. The position should be as far rearward as 
possible, consistent with ability to properly operate 
controls.
3Seat cushion tilt
Press the switch in the direction of the arrow until 
your legs are lightly supported.
4Backrest tilt
Press the switch in the direction of the arrow until 
your arms are slightly angled when holding the 
steering wheel.