Page 383 of 521

382 Practical hintsWhat to do if …Warning!
G
Each tire, including the spare (if provided), 
should be checked monthly when cold and 
inflated to the inflation pressure recom-
mended by the vehicle manufacturer on the 
vehicle placard or the tire inflation pressure 
label. (If your vehicle has tires of a different 
size than the size indicated on the vehicle 
placard or the tire inflation pressure label, 
you should determine the proper tire infla-
tion pressure for those tires).
As an added safety feature, your vehicle has 
been equipped with a tire pressure monitor-
ing system (TPMS) that illuminates a low tire 
pressure telltale when one or more of your 
tires is significantly under-inflated. Accord-
ingly, when the low tire pressure telltale illu-
minates, you should stop and check your 
tires as soon as possible, and inflate them to 
the proper pressure. Driving on a significant-
ly under-inflated tire causes the tire to over-
heat and can lead to tire failure.
Under-inflation also reduces fuel efficiency 
and tire tread life, and may affect the vehi-
cle’s handling and stopping ability. Please 
note that the TPMS is not a substitute for 
proper tire maintenance, and it is the driv-
er’s responsibility to maintain correct tire 
pressure, even if under-inflation has not 
reached the level to trigger illumination of 
the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a 
TPMS malfunction indicator to indicate 
when the system is not operating properly. 
The TPMS malfunction indicator is com-
bined with the low tire pressure telltale. 
When the system detects a malfunction, the 
telltale will flash for approximately 
one minute and then remain continuously 
illuminated. This sequence will continue 
upon subsequent vehicle start-ups as long 
as the malfunction exists. When the mal-
function indicator is illuminated, the system 
may not be able to detect or signal low tire 
pressure as intended.
TPMS malfunctions may occur for a variety 
of reasons, including the installation of in-
compatible replacement or alternate tires or 
wheels on the vehicle that prevent the TPMS 
from functioning properly. Always check the 
TPMS malfunction telltale after replacing 
one or more tires or wheels on your vehicle 
to ensure that the replacement or alternate 
tires and wheels allow the TPMS to continue 
to function properly. 
         
        
        
     
        
        Page 398 of 521

397 Practical hints
What to do if …
Display message
Possible cause/consequence
Possible solution
Tire pres. monitor
inoperative
The TPMS* is malfunctioning.
Have the TPMS* checked by an authorized 
Mercedes-Benz Center.
Tire pres. monitor
inoperative
No wheel sensors
There are wheels without wheel sensors 
mounted (e.g. winter tires).
Have the TPMS* checked by an authorized 
Mercedes-Benz Center.
Have the wheel sensors installed by an authorized 
Mercedes-Benz Center.
Tire pres. monitor
Wheel sensor missing
One or more sensors malfunction (e.g. bat-
tery in one or more wheel sensor is empty).
One or more wheels without wheel sensors 
mounted (e.g. spare tire).
Have the TPMS* checked by an authorized 
Mercedes-Benz Center.
Have the wheel sensors installed by an authorized 
Mercedes-Benz Center.
The tire pressure for the respective tire is shown in the 
multifunction display.
Tire pres. monitor
currently unavailable
The TPMS* is unable to monitor the tire 
pressure due to
a nearby radio interference source.
excessive wheel sensor temperatures.
As soon as the causes for the malfunction are no longer 
present, the TPMS* automatically becomes active again 
after a few minutes driving. 
         
        
        
     
        
        Page 449 of 521

448 Practical hintsFlat tireMOExtended system*
The MOExtended system allows you to 
continue driving your vehicle even if there 
is a total loss of pressure in one or more 
tires. 
You may only use the MOExtended system 
with the Tire Pressure Monitoring System* 
(TPMS*) (
page 339).
!The maximum distance in emergency 
mode depends on the vehicle’s load. It 
is 30 miles (50 km) if the vehicle is par-
tially loaded and 18 miles (30 km) if the 
vehicle is fully loaded. 
The point at which the maximum driv-
ing distance begins in emergency 
mode is when the warning message 
appears in the multifunction display 
indicating that there is a loss of tire 
inflation pressure. 
Do not exceed the maximum speed of 
50 mph (80 km/h). 
Warning!
G
In emergency mode, your vehicle’s driving 
characteristics are diminished in such situa-
tions as:
driving around curves
while braking
while accelerating rapidly
Therefore, your driving style must be adapt-
ed accordingly. Avoid abrupt steering and 
driving maneuvers, as well as driving over 
obstacles (road curbs, potholes, or off-road 
areas). This is especially important if the ve-
hicle is heavily loaded.
The emergency driving distance that can be 
achieved greatly depends on the demands 
placed on the vehicle. Depending on speed, 
load, driving maneuvers, road conditions, 
outside temperature, etc., the distance can 
be significantly shorter or, if the vehicle is 
driven cautiously, somewhat longer.
Do not continue driving in emergency mode 
if
you notice knocking sounds
the vehicle starts to shake
smoke develops and you smell rubber
ESP
® is intervening continuously
you notice tears on the tire sidewalls
After driving in emergency mode, you must 
have the rims inspected by an authorized 
Mercedes-Benz Center to check if they are 
suitable for further use. The failed tire must 
be replaced in any case.iWhen replacing individual or all tires on 
the vehicle, make sure only matching 
tires marked with “MOExtended” are 
mounted in the size specified for your 
vehicle. 
         
        
        
     
        
        Page 499 of 521

498 Technical termsTele Aid System
(T
elematic A
larm I
dentification on D
e-
mand)
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.TIN
(T
ire I
dentification N
umber)
(
page 355)
Tire load rating
(page 355)
Tire ply composition and material used
(page 355)
Tire speed rating
(page 356)
TPMS
(page 339)
Traction
(page 356)
Tread
(page 356)
Treadwear indicators
(page 356)
Uniform Tire Quality Grading Standards
(page 356)Vehicle capacity weight
(
page 356)
Vehicle level control*
The ground clearance of the vehicle is 
automatically controlled according to a 
selected setting and speed.The driver 
can set the ground clearance manually 
for example on very rough roads.
Vehicles Maintenance System 
(U.S. vehicles)
Maintenance service indicator in the 
multifunction display that informs the 
driver when the next vehicle mainte-
nance service is due. The Vehicle Main-
tenance System in your vehicle tracks 
distance driven and the time elapsed 
since your last maintenance service, 
calculates other maintenance service 
work required, and calls for the next 
maintenance service accordingly.
Vehicle maximum load on the tire
(page 356) 
         
        
        
     
        
        Page 517 of 521

516 IndexTemperature
Display mode
Interior temperature 207, 221
Setting display unit
Tether attachment points, see Cihildren in 
the vehicle
Tie-down rings, Trunk 275
Tightening torque 447, 498
Time 169, 170
Setting minutes 169
TIN 355
Tire and Loading Information 
Placard 332
Tire and Loading Terminology 353
Tire inflation pressure
Checking
Tire Pressure Monitoring System* 
(TPMS*), (USA only)
Checking tire pressure 
electronically 339
Tires 328, 473
Air pressure
Care and maintenance 329
Chains 359
Cleaning 330
Direction of rotation, Spinning 331Driving instructions 307
Important notes, Tire inflation 
pressure 338
Inflation pressure 339, 343
Information Placard 332
Inspection 329
Load rating 355
Messages in display 416
MOExtended system* 343, 448
Ply composition and material 
used 355
Problems under-/overinflation 343
Retreads 328
Rims and tires 473
Rotation 356
Service life 329
Sizes 475
Snow 358
Spare wheel
Speed rating 308, 346, 356
Storing 330
Temperature 338, 352
Terminology 353
Tire Identification Number see TIN
TPMS malfunction telltale 381
Traction 308, 356Tread 356
Tread depth 330, 358
Treadwear indicators 356
Wear pattern 356, 357
Winter 358
Tools 424
Top tether see Children in the vehicle
Tow-away alarm 103
Towing eye bolt 460
Towing the vehicle 457
Traction 189, 356
Transmission fluid level 324
Transmission gear slector lever see Gear 
selector lever
Traveling abroad 311
Tread 356
Tread depth 330, 358
Treadwear indicators 356
Trip computer 178
Trip odometer 151