
83 Restraint systems
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care IndexSeat belt nonusage warning system 
With the electronic key in starter switch position 2, a 
warning sounds for a short time if the driver’s seat belt 
is not fastened. 
Automatic comfort-fit seat belt:
An automatic comfort-fit feature for driver and front 
passenger seat belt is activated when the electronic key 
in the starter switch is turned to position 1 or 2.
The retraction force of the inertia reel is reduced, 
increasing the level of seat belt comfort.
Note:
For cleaning and care of the seat belts see page 382.
Wa r n i n g !
The seat belts provide protection only with the 
backrest locked in place. Do not drive the vehicle 
when the backrest is not locked in place. If the 
warning message “SEAT BACKREST  LEFT – LOCK!” 
or “SEAT BACKREST RIGHT – LOCK!” is displayed 
in the multifunction display, then the respective 
backrest is not engaged in its lock. For backrest see 
page 72.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. 

102 Restraint systems
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Infant and child restraint systems
We recommend all infants and children be properly 
restrained at all times while the vehicle is in motion. 
All lap-shoulder belts except the driver seat belt have 
special seat belt retractors for secure fastening of child 
restraints.
To activate, pull shoulder belt out completely and let it 
retract. During the seat belt retraction a ratcheting 
sound can be heard to indicate that the special seat belt 
retractor is activated. The belt is now locked.
To deactivate, release seat belt buckle and let seat belt 
retract completely. The seat belt can again be used in 
the usual manner.
Note:
For child seats with mounting fittings for tether 
anchorages refer to page 104 (installation of infant and 
child  restra int  systems).Important!
The u se of infa nt or child  restraints is required by law in 
all 50 states and all Canadian provinces.
Infants and small children should be seated in an 
appropriate infant or child restraint system properly 
secured by a lap-shoulder belt, and that complies with 
U.S. Federal Motor Vehicle Safety Standard 213 and 
Canadian Motor Vehicle Safety Standard 213. 
A statement by the child restraint manufacturer of 
compliance with this standard can be found on the 
instruction label on the restraint and in the instruction 
manual provided with the restraint.
Wh en using  any infant or ch il d restraint system, be su re 
to carefully read and follow all manufacturer’s 
instructions for installation and use. 
Please read and observe warning labels affixed to inside 
of vehicle and to infant or child restraints.
Wa r n i n g !
Never release the seat belt buckle while vehicle is 
in motion, since the special seat belt retractor will 
be deactivated. 

231 Automatic transmission
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Stopping
For brief stops, e.g. at traffic lights, leave the 
transmission in gear and hold vehicle with the service 
brake.
For longer stops with the engine idling, shift into “N” 
or “P” and hold the vehicle with the service brake.
When stopping the vehicle on an uphill gradient, do not 
hold it with the accelerator, use the brake. This avoids 
unnecessary transmission heat build up.
Maneuvering
To maneuver in tight areas, e.g. when pulling into a 
parking space, control the vehicle speed by gradually 
releasing the brakes. Accelerate gently and never 
abruptly step on the accelerator.
To rock a vehicle out of soft ground (mud or snow), 
alternately shift from forward to reverse, while applying 
slight partial throttle.Rocking a vehicle free in this manner may cause the 
ABS or traction system malfunction indicator lamp to 
come on. Turn off and restart the engine to clear the 
malfunction indication.
Wa r n i n g !
Getting out of your vehicle with the selector lever 
not fully engaged in position “P” is dangerous. 
Also, w hen parked on an incline, posi tion “P” alone 
may not prevent your vehicle from moving, 
possibly hitting people or objects.Always set t he parki ng brake in addi tion to sh ifting 
to position “P”, see page 238 for parking brake. When parked on an incline, also turn front wheel 
against curb.Wa r n i n g !
When leaving the vehicle always remove the 
electronic key from the starter switch, take the 
KEYLESS-GO-card (if so equipped) with you and 
lock the vehicle. Do not leave children unattended 
in the vehicle, or with access to an unlocked 
ve h i c l e .  C h i l dr e n  c o u l d m ove  t h e  ge a r  s e l e c t or  lev e r  
from position “P”, which could result in an 
accident or serious injury. 

237 Automatic transmission
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index WWinter/Wet (snow and ice) mode
Press switch on symbol “W”. The vehicle starts 
out in 2nd gear, except with selector lever in 1st 
gear, or with accelerator pedal in kick-down 
position.
The “W”  mode helps to improve traction and 
driving stability of the vehicle.
The gear shifting process occurs at lower vehicle 
and engine speeds than in the “S” program mode.
Caution!
Never change the program mode when the selector lever 
is out of position “P”. It could result in a change of 
driving characteristics for which you may not be 
prepared.
Important!
Always be certain of the program mode selected since 
the vehicle driving characteristics change with the 
selection of the program mode.
Dependent on the program mode selector switch 
position “S” or “W” and the gear selector lever in 
position “R”, the ratio of power transmission changes.Emergency operation
(Limp home mode)
If vehicle acceleration worsens or the transmission no 
longer shifts, the transmission is most likely operating 
in Limp Home Mode which engages when there is a 
malfunction of the transmission. This condition may be 
accompanied by the “CHECK ENGINE” malfunction 
indicator lamp in the instrument cluster coming on.
In this mode only the 2nd gear or reverse gear can be 
activated.
To engage 2nd gear or reverse:
1. Stop the vehicle.
2. Move selector lever to position “P”.
3. Turn off the engine.
4. Wait approx. 10 seconds.
5. Restart the engine.
6. Move sel ector lever to position “D”  (for 2nd gear), or 
move selector lever to position “R” (for reverse gear).
Have the transmission checked at your authorized 
Mercedes-Benz Center as soon as possible. 

243 Driving instructions
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Tires
Tread wear indicators (TWI) are required by law. These 
indicators are located in six places on the tread 
circumference and become visible at a tread depth of 
approximately 
1/16 in (1.5 mm), at which point the tire is 
considered worn and should be replaced.
The tread wear indicator appears as a solid band across 
the tread.Specified tire pressures must be maintained. This 
applies particularly if the tires are subjected to high 
loads (e.g. high speeds, heavy loads, high ambient 
temperatures).
Wa r n i n g !
If you feel a sudden significant vibration or ride 
disturbance, or you suspect that possible damage to 
your vehicle has occurred, you should turn on the 
hazard warning flashers, carefully slow down, and 
drive with caution to an area which is a safe 
distance from the roadway.Inspect the tires and under the vehicle for possible 
damage. If the vehicle or tires appear unsafe, have 
it towed to the nearest Mercedes-Benz Center or 
tire dealer for repairs.
Wa r n i n g !
Do not allow your tires to wear down too far. As 
tread depth approaches 
1/16 in (1.5 mm), the 
adhesion properties on a wet road are sharply 
reduced.
Depending upon the weather and/or road surface 
(conditions), the tire traction varies widely.Wa r n i n g !
Do not drive with a flat tire. A flat tire affects the 
ability to steer or brake the vehicle. You may lose 
control of th e vehi cle. Continued drivi ng wi th a f lat 
tire or driving at high speed with a flat tire will 
cause excessive heat build-up and possibly a fire. 

244 Driving instructions
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Aquaplaning
Depending on the depth of the water layer on the road, 
aquaplaning may occur, even at low speeds and with 
new tires. Reduce vehicle speed, avoid track grooves in 
the road and apply brakes cautiously in the rain.
Tire traction
The safe speed on a wet, snow covered or icy road is 
always lower than on a dry road.
You should pay particular attention to the condition of 
the road whenever the outside temperatures are close to 
the freezing point.We recommend M+S rated radial-ply tires for the winter 
season for all four wheels to insure normal balanced 
handling characteristics. On packed snow, they can 
reduce your stopping distance as compared with 
summer tires. Stopping distance, however, is still 
considerably greater than when the road is not snow or 
ice covered.
Wa r n i n g !
If ice has formed on the road, tire traction will be 
substantially reduced. Under such weather 
conditions, drive, steer and brake with extreme 
caution. 

268 Driving systems
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Brake assist system (BAS)
The BAS is designed to maximize the vehicle’s braking 
capability during emergency braking maneuvers by 
having maximum power boost applied to the brakes 
more quickly in emergency braking conditions than 
might otherwise be afforded solely by the driver’s 
braking style. This can help reduce braking distances 
over what ordinary driving and braking style might do. 
The BAS complements the antilock brake system (ABS).Applying the brakes very quickly results in maximum 
BA S  a ssistance.
To receive the benefit of the system you must apply 
continuous full braking power during the stopping 
sequence. Do not reduce brake pedal pressure.
Once the brake pedal is released, the BAS is deactivated.
If the BAS warning message is displayed, a malfunction 
has been detected in the system. The brake system 
functions in the usual manner, but without BAS.
With the ABS malfunctioning, the BAS is also switched 
off.
If a BAS warning message is displayed, have the BAS 
checked at your authorized Mercedes-Benz Center as 
soon as possible.
Wa r n i n g !
BAS cannot prevent the natural laws of physics 
from acting on the vehicle, nor can it increase 
braking efficiency beyond that afforded by the 
condition of the vehicle brakes and tires or the 
traction afforded. The BAS cannot prevent 
accidents, including those resulting from excessive 
speed in turns, following another vehicle too 
closely, or aquaplaning. Only a safe, attentive, and 
skillful driver can prevent accidents. The 
capabilities of a BAS equipped vehicle must never 
be exploited in a reckless or dangerous manner 
which could jeopardize the user’s safety or the 
safety of others. 

270 Driving systems
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
ABS control
The ABS malfunction indicator lamp- in the 
instrument cluster comes on with the electronic key in 
starter switch position 2 and should go out with the 
engine running.
When the ABS malfunction indicator lamp in the 
instrument cluster comes on while the engine is 
running, it indicates that the ABS has detected a 
malfunction and has switched off. In this case, the brake 
system functions in the usual manner, but without 
antilock assistance.
For ABS malfunction indicator lamp, see page 294.
With the ABS malfunctioning, the BAS and ESP are also 
switched off. Both malfunction indicator lamps come on 
with the engine running.
If the charging voltage falls below 10 volts, the 
malfunction indicator lamp comes on and the ABS is 
sw itched  of f. W he n t he voltage is a bove this val ue again, 
the malfunction indicator lamp should go out and the 
ABS is operational.If th e ABS ma lfu nction indicator la mp stays ill uminated , 
have the system checked at your authorized 
Mercedes-Benz Center as soon as possible.
Note:
To alert following vehicles to slippery road conditions 
you discover, operate your hazard warning flashers as 
appropriate.
Wa r n i n g !
ABS cannot prevent the natural laws of physics 
from acting on the vehicle, nor can it increase 
braking or steering efficiency beyond that afforded 
by the condition of the vehicle brakes and tires or 
the traction afforded. The ABS cannot prevent 
accidents, including those resulting from excessive 
speed in turns, following another vehicle too 
closely, or aquaplaning. Only a safe, attentive, and 
skillful driver can prevent accidents. The 
capabilities of a ABS equipped vehicle must never 
be exploited in a reckless or dangerous manner 
which could jeopardize the user’s safety or the 
safety of others.