Page 415 of 521
414 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
<
Seat belt system
Drive to workshop
The seat belt system is malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
9
Service memory full
See Operator’s Manual
The maintenance system service memory 
cannot save any more data.
Have the service memory checked by 
an authorized Mercedes-Benz Center.
K
Close
tilt/sliding sunroof
You have opened the driver’s door with 
the SmartKey removed from the starter 
switch and the sliding portion of the 
tilt/sliding sunroof* open.
Close the tilt/sliding sunroof* 
(page 236).
J
Close
tilt/sliding sunroof
You have opened the driver’s door with 
the SmartKey removed from the starter 
switch and the tilting portion of the 
tilt/sliding sunroof* open.
Close the tilt/sliding sunroof* 
(page 236). 
         
        
        
     
        
        Page 416 of 521
415 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
L 
Tele Aid malfunction
Drive to workshop
One or more main functions of the Tele 
Aid system are malfunctioning.
Have the Tele Aid system checked by 
an authorized Mercedes-Benz Center.
1
Restraint system
malfunction
Visit workshop
The system is malfunctioning.
Drive with added caution to the near-
est authorized Mercedes-Benz 
Center.
Warning!
G
In the event a malfunction of the SRS is indi-
cated as outlined above, the SRS may not be 
operational. 
For your safety, we strongly recommend 
that you visit an authorized Mercedes-Benz 
Center immediately to have the system 
checked; otherwise the SRS may not be 
activated when needed in an accident, 
which could result in serious or fatal injury, 
or it might deploy unexpectedly and unnec-
essarily which could also result in injury. 
         
        
        
     
        
        Page 417 of 521
416 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
t
Function
unavailable
This display appears if button t or 
s on the multifunction steering wheel 
is pressed and the vehicle is not equipped 
with a telephone.
& 
Tailgate open
This message will appear whenever the 
cargo compartment is open.
Close the cargo compartment. 
W 
Washer fluid,
please refill
The fluid level has dropped to about 
1/3 
of total reservoir capacity.
Add washer fluid (
page 323). 
         
        
        
     
        
        Page 418 of 521
417 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
@
Vehicle rising
Your vehicle is adjusting to your level se-
lection.
Vehicle rising
Please wait briefly
The vehicle level is too low.
Do not drive off.
The Airmatic* has not yet adjusted the ve-
hicle level to the necessary height re-
quired for driving.
Wait until the message disappears from 
the multifunction display.
You may then drive off.
Stop, car too low
The Airmatic* is malfunctioning.
Avoid excessive steering input. The fender or 
tires could otherwise be damaged. Listen for 
scraping noises. Do not drive faster than 
50 mph (80 km/h).
Drive to the side of the road and select a 
higher vehicle level. Depending on the 
type of malfunction, this may raise the ve-
hicle’s level.
There is otherwise danger of an accident. 
         
        
        
     
        
        Page 419 of 521
418 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
@
Visit workshop
The system is functional only to a limited 
extent.
The system display or the system is mal-
functioning.
Do not drive faster than 50 mph 
(80 km/h).
Have the vehicle checked at an autho-
rized Mercedes-Benz Center.
Display malfunction
Visit workshop
The system display or the system is mal-
functioning.
Do not drive faster than 50 mph 
(80 km / h).
Have the vehicle checked at an autho-
rized Mercedes-Benz Center. 
         
        
        
     
        
        Page 432 of 521
431 Practical hints
Replacing bulbs
Replacing bulbs
Bulbs
Safe vehicle operation depends on proper 
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp as-
semblies are in good working order at all 
times.
Correct headlamp adjustment is extremely 
important. Have headlamps checked and 
readjusted at regular intervals and when a 
bulb has been replaced. See your autho-
rized Mercedes-Benz Center for headlamp 
adjustment.
iIf the headlamps or front fog lamps are 
fogged up on the inside as a result of 
high humidity, driving the vehicle a dis-
tance with the lights on should clear up 
the fogging.
iSubstitute bulbs will be brought into 
use when lamps malfunction. Read and 
observe messages in the multifunction 
display (
page 409). 
         
        
        
     
        
        Page 443 of 521

442 Practical hintsFlat tire
Screw the air pump’s air hose5 onto 
flange6 of the TIREFIT container.
Stick TIREFIT container1 upside 
down into notch3 of the electric air 
pump.
7Tire valve
8Electric air pump switch
9Air hose with pressure gauge and vent 
screw
aFiller hose
Unscrew the valve cap from tire 
valve7.
Screw filler hosea onto tire valve7.
Insert electrical plug4 into the vehi-
cle cigarette lighter socket 
(page 278).
Turn the SmartKey in the starter switch 
to position1 (
page 36).
or
Press the KEYLESS-GO* start/stop 
button (
page 38) on the gear selec-
tor lever once. Do not depress brake 
pedal.
PressI on electric air pump switch8.
The electric air pump should now 
switch on and inflate the tire.After 5 minutes, the pressure gauge must 
display at least 26 psi (1.8 bar). The air 
hose can become hot during inflation. 
Please exercise appropriate caution.
If this tire inflation pressure is not at-
tained, turn off the electric air pump, 
detach the filler hose from the tire 
valve, and drive vehicle back and forth 
very slowly approximately 30 ft (10 m).
This serves to better distribute the 
TIREFIT sealant material inside the tire.
Unscrew the air pump’s air hose5 
from flange6 of the TIREFIT contain-
er.
Screw air hose5onto tire valve7.
Inflate the tire again.
Warning!
G
Observe safety instructions on air pump la-
bel.
!Do not operate the electric air pump 
longer than 8 minutes without interrup-
tion. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.
 
         
        
        
     
        
        Page 452 of 521

451 Practical hints
Flat tire
MOExtended 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 335).
!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.