Page 88 of 4133

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 89 of 4133
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 99 of 4133
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 505 of 4133

38 
Seats
Te ch n ica l 
data 
Instruments  
and controls  Operation 
Driving Instrument  
cluster display  Practical 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 506 of 4133
39 
Seats
Te ch n ica l 
data 
Instruments  
and controls  Operation 
Driving Instrument  
cluster display  Practical hints Car care Index 
Manual seats  
(ML 320) 
We recommend to adjust the manual seat in the  
following order: 
1  Seat, 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.  2 
Seat cushion inclination adjustment 
Raise lever (2), move seat cushion to desired  
position. Release lever. 
3  Backrest adjustment 
Turn handwheel (3). 
4  Head 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 516 of 4133
49 
Restraint systems
Te ch n ica l 
data 
Instruments  
and controls  Operation 
Driving Instrument  
cluster display  Practical 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.  4 
Button 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 839 of 4133
35 Getting started
Adjusting
Manual seat adjustment
1Seat fore and aft adjustment
2Backrest tilt
3Seat heightSeat fore and aft adjustment
Lift handle1.
Slide seat to the desired position.
Allow handle1 to reengage.
Check for proper seat engagement 
before driving.
Adjust seat to a comfortable seating posi-
tion that still allows you to reach the 
accelerator / brake pedal safely. The posi-
tion should be as far rearward as possible, 
consistent with ability to properly operate 
controls.
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.
iWhen moving the seat, be sure that 
there are no items in the footwell or 
behind the seats. Otherwise you could 
damage the seats. 
     
        
        Page 841 of 4133

37 Getting started
Adjusting
Head restraint tilt
Manually adjust the angle of the head 
restraint.
Push or pull on the upper edge of the 
head restraint cushion.
More information on seats can be found in 
the “Controls in detail” section 
(
page 95).Power seat* adjustment
The seat adjustment switch is located on 
the entry side of each front seat base.
1Backrest tilt
2 Seat fore and aft adjustment
3Seat cushion tilt
4Seat height
Turn the key in the steering lock to 
position1 or2 (
page 33).
or
Open the driver’s or passenger door.
Seat fore and aft adjustment
Press the switch forward or backward 
in the direction of arrow1.
Adjust seat to a comfortable seating 
position that still allows you to reach 
the accelerator / brake pedal safely. 
The position should be as far to the rear 
as possible, consistent with ability to 
properly operate controls.iWhen moving the seat, be sure that 
there are no items in the footwell or be-
hind the seat. Otherwise you could 
damage the seat.
The memory function* (
page 105) 
lets you store the setting for the seat 
positions together with the setting for 
the exterior rear view mirrors.