Page 42 of 417

41 Getting started
Adjusting
Adjusting
SeatsThe seat adjustment switch is located on 
the door sill.
1Seat fore and aft adjustment
2Seat height
3Seat angleWarning!
G
All seat, steering wheel, and rear view mirror 
adjustments, as well as fastening of seat 
belts, must be done before the vehicle is put 
into motion.Warning!
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 place hands under the seat or near 
any moving parts while a seat is being ad-
justed.
Never ride in a moving vehicle with the seat 
back in an excessively reclined position as 
this can be dangerous. You could slide un-
der the seat belt in a collision. If you slide 
under it, the belt would apply force at the ab-
domen or neck. 
That could cause serious or fatal injuries. 
The seat back and seat belts provide the 
best restraint when the wearer is in a nearly 
upright position and belts are properly posi-
tioned on the body. Your seat must be ad-
justed so that you can correctly fasten your 
seat belt (
page 45).
Warning!
G
When leaving the vehicle, always remove the 
SmartKey from the starter switch, take it 
with you, and lock the vehicle.
Even with the SmartKey removed from the 
starter switch or the vehicle, the seats can 
be operated. Therefore, do not leave chil-
dren unattended in the vehicle, or with ac-
cess to an unlocked vehicle. Unsupervised 
use of vehicle equipment may cause an ac-
cident and/or serious personal injury. 
     
        
        Page 73 of 417

72 Safety and SecurityOccupant safetyEmergency tensioning device (ETD), 
seat belt force limiter
The seat belts are equipped with 
emergency tensioning devices and belt 
force limiters.
The ETD is designed to activate in the 
following cases when the seat belts are 
fastened: 
in frontal or rear-end impacts exceed-
ing a preset severity level
if the restraint systems are operational 
and functioning correctly, see 1 in-
dicator lamp (
page 62).
In an impact, emergency tensioning devic-
es remove slack from the belts in such a 
way that the seat belts fit more snugly 
against the body. Belt force limiters reduce 
the force exerted by the seat belts on 
occupants during a crash.
Children in the vehicle
If an infant or child is traveling with you in 
the vehicle:
Secure the child using an infant or child 
restraint appropriate to the age and 
size of the child.
Make sure the infant or child is proper-
ly secured at all times while the vehicle 
is in motion.
Infant and child restraint seats and infor-
mation on choosing an appropriate re-
straint system can be obtained from any 
Mercedes-Benz Center.
Warning!
G
An emergency tensioning device (ETD) that 
was activated must be replaced. 
When disposing of the emergency tension-
ing device, our safety instructions must be 
followed. These are available at your autho-
rized Mercedes-Benz Center.!Do not place objects heavier than 
20 lbs (9 kg) on the front passenger 
seat. This could cause the front or side 
impact airbag on the passenger side 
and, with the seat belt fastened to se-
cure the object, the ETD to deploy in a 
crash which exceeds the system’s de-
ployment threshold.  
     
        
        Page 76 of 417

75 Safety and Security
Occupant safety
BabySmart
TM1
 airbag deactivation 
system
1PASSENGER AIRBAG OFF indicator 
lamp
Special BabySmart
TM compatible child 
seats, designed for use with the 
Mercedes-Benz system and available at 
any authorized Mercedes-Benz Center, are 
required for use with the BabySmart
TM air-
bag deactivation system. With the special 
child seat properly installed, the passenger 
front airbag and the passenger knee airbag 
will not deploy.The PASSENGER AIRBAG OFF indicator 
lamp1 located on the lower part of the 
center console will be illuminated, except 
with the SmartKey removed or in starter 
switch position0.Self-test BabySmart
TM
 without special 
child seat installed
After turning the SmartKey in the starter 
switch to position1 or2, the PASSENGER 
AIRBAG OFF indicator lamp comes on for 
approximately six seconds and then goes 
out.
If the PASSENGER AIRBAG OFF indicator 
lamp should not come on or is continuous-
ly lit, the system is not functioning. You 
must see an authorized Mercedes-Benz 
Center before seating any child on the 
front passenger seat.
1BabySmart
TM is a trademark of Siemens 
Automotive Corp.
iThe system does not deactivate the 
head-thorax airbag and the emergency 
tensioning device.