Page 58 of 341
55 Seats
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Seat heater
The seat heaters can be switched on with the electronic 
key in steering lock positions 1 or 2.Notes:
When in operation, the seat heater consumes a large 
amount of electrical power. It is not advisable to use the 
seat heater longer than necessary.
The seat heaters may automatically switch off if too 
many power consumers are switched on at the same 
time, or if the battery charge is low. When this occurs, 
the indicator lamp in the switch will blink (both 
indicator lamps blink during rapid seat heating mode). 
The seat heaters will switch on again automatically as 
soon as sufficient voltage is available.
If the blinking of the indicator lamps is distracting to 
you, the seat heaters can be switched off. 
         
        
        
     
        
        Page 59 of 341
56 Seats
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Vehicles without seat ventilation
The front seat heater switches are located in the center 
console.Press switch to turn on seat heater:
1Normal seat heating mode. One indicator lamp in 
the switch lights up.
2Rapid seat heating mode. Both indicator lamps in 
the switch light up.
After approximately 5 minutes in the rapid seat 
heating mode, the seat heater automatically 
switches to normal operation and only one indicator 
lamp will stay on.
Turning off seat heater:
If one indicator lamp is on, press upper half of switch.
If both indicator lamps are on, press lower half of 
switch.
If left on, the seat heater automatically turns off after 
approximately 30 minutes of operation.
P54.25-2036-26
12 
         
        
        
     
        
        Page 60 of 341
57 Seats
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Vehicles with seat ventilation
The front seat heater switches are located in the center 
console.Rapid heating mode:
Press button (3) once.
Both red indicator lamps above the button light up.
The system switches over to normal heating mode 
automatically after approximately 5 minutes.
Normal heating mode:
Press button (3) twice.
One red indicator lamp above the button lights up.
The seat heater will be automatically switched off after 
approximately 30 minutes.
Turning off the heater:
Press the button (3) again.
The indicator lamps go out. The seat heater is switched 
off. 
         
        
        
     
        
        Page 61 of 341
58 Seats
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Seat ventilation
The front seat ventilation switches are located in the 
center console.
Turn the electronic key in steering lock to position 1 
or 2.Level 3 ventilation setting (maximum):
Press button (1). 
Three blue indicator lamps beside the button light up.
The level of ventilation is decreased one step 
approximately every 10 minutes.
Level 2 ventilation setting (middle):
Press button (1) again.
Two blue indicator lamps beside the button light up.
Level 1 ventilation setting (minimum):
Press button (1) again.
One blue indicator lamp beside the button lights up.
Turning off seat ventilation:
If one blue indicator lamp is on, press button (1) once.
If two blue indicator lamps are on, press button (1) 
twice.
If three blue indicator lamps are on, press button (1) 
three times. 
         
        
        
     
        
        Page 62 of 341
59 Seats
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Notes:
When in operation, the seat ventilation consumes a 
large amount of electrical power. It is not advisable to 
use the seat ventilation longer than necessary.
The seat ventilation may automatically switch off if too 
many power consumers are switched on at the same 
time or if the battery charge is low. When this occurs, 
one or more indicator lamps in the switch will blink.
The seat ventilation will switch on again automatically 
as soon as sufficient voltage is available.
If the blinking indicator lamps pose a distraction, the 
seat ventilation can be switched off. 
         
        
        
     
        
        Page 63 of 341

60 Restraint systems
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Seat belts and integrated restraint system
Your vehicle is equipped with seat belts for all seats, 
emergency tensioning retractors for all outboard seat 
belts, dual front airbags, door mounted side impact 
airbags and head protective window curtain airbags. 
Their protective functions are designed to complement 
one another.
Seat belts
Important
Laws in most states and all Canadian provinces require 
seat belt use.
All states and provinces require use of child restraints 
that comply with U.S. Federal Motor Vehicle Safety 
Standard 213 and Canadian Motor Vehicle Safety 
Standard 213.
All child restraint systems are designed to be secured in 
vehicle seats by lap belts or the lap belt portion of a lap-
shoulder belt.
For your safety and that of your passengers we strongly 
recommend their use.
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 
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 will 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 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 64 of 341

61 Restraint systems
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Note:
For cleaning and care of the seat belts, see page 304.
Seat belt nonusage warning system
With the electronic key in steering lock position 2, a 
warning sounds for a short time if the driver’s seat belt 
is not fastened.
Wa r n i n g !
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.
Wa r n i n g !
Failure to wear and properly fasten and position 
your seat belt greatly increases your risk of 
injuries and their likely severity in an accident. 
You and your passengers should always wear seat 
belts.If you are ever in an accident, your injuries can be 
considerably more severe without your seat belt 
properly buckled. Without your seat belt buckled, 
you are much more likely to hit the interior of the 
vehicle or be ejected from it. You can be seriously 
injured or killed.In t he sam e crash, th e possi bi li ty of i nju ry or deat h 
is lessened if you are wearing your seat belt.Wa r n i n g !
Never let more people ride in the vehicle than there 
are seat belts available. Be sure everyone riding in 
the vehicle is correctly restrained with a separate 
seat belt. 
         
        
        
     
        
        Page 65 of 341
62 Restraint systems
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Fastening of seat belts
1Latch plate
2Buckle
3Release buttonPush latch plate (1) into buckle (2) until it clicks. Do not 
twist the belt. A twisted seat belt may cause injury.
To help avoid severe or fatal injuries, the lap belt should 
be positioned as low as possible on your hips and not 
across the abdomen.
Wa r n i n g !
Always fasten your seat belt before driving off. 
Always make sure your passengers are properly 
restrained – even those sitting in the rear.