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309 Technical data
Consumer information
Temperature
The temperature grades are A (the high-
est), B, and C, representing the tire’s resis-
tance to the generation of heat and its 
ability to dissipate heat when tested under 
controlled conditions on a specified indoor 
laboratory test wheel. Sustained high tem-
perature can cause the material of the tire 
to degenerate and reduce tire life, and ex-
cessive temperature can lead to sudden 
tire failure. The grade C corresponds to a 
level of performance which all passenger 
car tires must meet under the Federal Mo-
tor Vehicle Safety Standard No. 109. 
Grades B and A represent higher levels of 
performance on the laboratory test wheel 
than the minimum required by law.
Warning!
G
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and 
not overloaded. Excessive speed, underin-
flation, or excessive loading, either sepa-
rately or in combination, can cause 
excessive heat build-up and possible tire 
failure. 
     
        
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311 Technical terms
ABS
(A
ntilock B
rake S
ystem)
Prevents the wheels from locking up 
during braking so that the vehicle can 
continue to be steered.
BabySmart
TM airbag deactivation 
system
This system detects if a special system 
compatible child restraint seat is in-
stalled on the front passenger seat. The 
system will automatically deactivate 
the passenger front airbag when such a 
seat is properly installed (indicator 
lamp7 in the instrument cluster 
lights up). See your authorized 
Mercedes-Benz Light Truck Center for 
availability. 
BabySmartTM compatible child seats
Special restraint system for children. 
The sensor system for the passenger 
seat prevents deployment of the pas-
senger front airbag if a BabySmart
TM 
compatible child seat is installed.BAS
(B
rake A
ssist S
ystem)
System for potentially reducing braking 
distances in emergency braking situa-
tions. The system is activated when it 
senses an emergency based on how 
fast the brake is applied.
Bi-Xenon headlamps*
Headlamps which use an electric arc as 
the light source and produce a more in-
tense light than filament headlamps. 
Bi-Xenon headlamps produce low 
beam and high beam.
CAC
(C
ustomer A
ssistance C
enter)
Mercedes-Benz customer service cen-
ter, which can help you with any ques-
tions about your vehicle and provide 
assistance in the event of a break-
down.CAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control ve-
hicle functions such as door locking or 
windshield wiping.
Cockpit
All instruments, switches, buttons and 
indicator / warning lamps in the pas-
senger compartment needed for vehi-
cle operation and monitoring.
Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed 
set by the driver.
Engine number
The number set by the manufacturer 
and placed on the cylinder block to 
uniquely identify each engine pro-
duced. 
     
        
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312 Technical termsEngine oil viscosity
Measurement for the inner friction (vis-
cosity) of the oil at different tempera-
tures. The higher the temperature an 
oil can tolerate without becoming thin, 
or the lower the temperature it can tol-
erate without becoming viscous, the 
better the viscosity.
ESP
(E
lectronic S
tability Pr
ogram)
Improves vehicle handling and direc-
tional stability.
ETD
(E
mergency T
ensioning D
evice)
Device which deploys in certain frontal 
and rear collisions exceeding the sys-
tem's threshold to tighten the seat 
belts.
->SRSFSS
(F
lexible S
ervice S
ystem)
Service indicator in the speedometer 
display that informs the driver when 
the next vehicle maintenance service is 
due.
Gear range
Number of gears which are available to 
the automatic transmission for shifting. 
The automatic gear shifting process 
can be adapted to specific operating 
conditions using the gear selector 
lever.
GPS
(G
lobal P
ositioning S
ystem)
Satellite-based system for relaying 
geographic location information to and 
from vehicles equipped with special re-
ceivers. Employs CD or DVD digital 
maps for navigation.GAWR
(G
ross A
xle W
eight R
ating)
The GAWR is the maximum permissible 
axle weight. The gross vehicle weight 
on each axle must never exceed the 
GAWR for the front and rear axle indi-
cated on the certification label located 
on the driver’s door pillar.
GVW
(G
ross V
ehicle W
eight)
The GVW comprises the weight of the 
vehicle including fuel, tools, spare 
wheel, installed accessories, passen-
gers and cargo. The GVW must never 
exceed the GVWR, indicated on the 
certification label located on the driv-
er’s door pillar. 
     
        
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313 Technical terms
GVWR
(G
ross V
ehicle W
eight R
ating)
This is the maximum permissible vehi-
cle weight. It is indicated on certifica-
tion label located on the driver’s door 
pillar.
Instrument cluster
The displays and indicator / warning 
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer, 
engine temperature and fuel gauge.
Kickdown
Depressing the accelerator past the 
point of resistance shifts the transmis-
sion down to the lowest possible gear. 
This very quickly accelerates the vehi-
cle and should not be used for normal 
acceleration needs.Line of fall
The direct line that an object moves 
downhill when influenced by the force 
of gravity alone.
Lock button
Button on the door which indicates 
whether the door is locked or un-
locked. Pushing the lock button down 
on an individual door from inside will 
lock that door.
MCS
(M
odular C
ontrol S
ystem)
Information and operating center for 
vehicle sound and communications 
systems, including the radio and the ra-
dio and navigation system, as well as 
for other optional equipment (CD 
changer, telephone, etc.).Memory function*
Used to store three individual seat, 
steering wheel and mirror positions.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline 
as determined by a standardized meth-
od. It is an indication of a gasoline's 
ability to resist undesired detonation 
(knocking). The average of both the 
MON (Motor Octane Number) and 
->RON (Research Octane Number) is 
posted at the pump, also known as 
ANTI-KNOCK INDEX.
Multifunction display
A display field in the instrument cluster 
used to present information provided 
by the control system.
Parktronic system* (Parking assist)
System which uses visual and acoustic 
signals to assist the driver during park-
ing maneuvers. 
     
        
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314 Technical termsPoly-V-belt drive
Drives engine-components (alternator, 
AC compressor, etc.) from the engine.
Power train
Collective term designating all compo-
nents used to generate and transmit 
motive power to the drive axles, includ-
ing
engine
clutch / torque converter
transmission
transfer case
drive shaft
differential
axle shafts / axlesRemote Vehicle Diagnostics
Transmission of vehicle data and cur-
rent location to the Mercedes-Benz 
Customer Assistance Center for sub-
scribers to Tele Aid service.
REST
(Residual engine heat utilization)
Feature that uses the engine heat 
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.
Restraint system
Seat belts, belt tensioner, airbags and 
child seat restraint systems. As inde-
pendent systems, their protective func-
tions complement one another.RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized 
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both 
the ->MON (Motor Octane Number) 
and RON (Research Octane Number) is 
posted at the pump, also known as 
ANTI-KNOCK INDEX.
Shift lock
When the vehicle is parked, this lock 
prevents the transmission selector le-
ver from being moved out of positionP 
without key turned and brake pedal de-
pressed.
SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and airbags. Though independent 
systems, they are closely interfaced to 
provide effective occupant protection. 
     
        
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315 Technical terms
Tele Aid System*
(T
elematic A
larm I
dentification on 
D
emand)
The Tele Aid system consists of three 
types of response: automatic and man-
ual emergency, roadside assistance 
and information. Tele Aid is initially ac-
tivated by completing a subscriber 
agreement and placing an acquain-
tance call.
The Tele Aid system is operational pro-
vided that the vehicle’s battery is 
charged, properly connected, not dam-
aged and cellular and GPS coverage is 
available.
Telematics*
A combination of the terms “telecom-
munications” and “informatics”.
Tightening torque
Force times lever arm (e.g. a lug 
wrench) with which threaded fasteners 
such as wheel bolts are tightened.Tire speed rating
Part of tire designation; indicates the 
speed range for which a tire is ap-
proved.
Traction
Force exerted by the vehicle on the 
road via the tires.
Transfer case
Speed of rotation / torque converter 
that works together with the ->auto-
matic transmission. In the LOW mode 
off-road position, the transfer case de-
creases the output rotational speed of 
the ->automatic transmission by ap-
proximately half. This results in a corre-
sponding increase of torque on the 
drive axles.
The vehicle then has nearly double the 
driving force but drives only approxi-
mately half as fast.TWR
(T
ongue W
eight R
ating)
The TWR is the maximum permissible 
weight on the trailer tongue.
VIN
(V
ehicle I
dentification N
umber)
The number set by the manufacturer 
and placed on the body to uniquely 
identify each vehicle produced.
Voice control system*
Voice control system for car phones, 
portable cell phones and audio sys-
tems (radio, CD, etc.).  
     
        
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