Page 74 of 522

73 Safety and Security
Occupant safety
When you sell your vehicle we strongly
urge you to give notice to the subsequent
owner that it is equipped with an SRS by
alerting them to the applicable section in
the Operator’s Manual.
or door frame trims, and installation of
additional electrical/electronic equip-
ment on or near SRS components and
wiring. Keep area between air bags and
occupants free from objects (e.g. pack-
ages, purses, umbrellas, etc.).
Do not pass seat belts over sharp edges.
They could tear.
Do not make any modification that could
change the effectiveness of the seat
belts.
Do not bleach or dye seat belts as this
may severely weaken them. In a crash
they may not be able to provide ade-
quate protection.
Do not hang items such as coat hangers
from the coat hooks or handles over the
door. These items may turn into projec-
tiles and cause head and other injuries
when the window curtain air bag is de-
ployed.
Never place your feet on the instrument
panel, dashboard, or on the seat. Always
keep both feet on the floor in front of the
seat.
Air bag system components will be hot
after an air bag has inflated. Do not
touch.
In addition, improper repair work on the
SRS creates a risk of rendering the SRS
inoperative or causing unintended
air bag deployment. Work on the SRS
must therefore only be performed by
qualified technicians. Contact an autho-
rized Mercedes-Benz Center.
For your protection and the protection
of others, when scrapping the air bag
unit or emergency tensioning device,
our safety instructions must be fol-
lowed. These instructions are available
from your authorized Mercedes-Benz
Center.
Given the considerable deployment
speed, required inflation volume, and
the textile structure of the air bags,
there is the possibility of abrasions or
other, potentially more serious injuries
resulting from air bag deployment.
Warning!
G
Only use seat covers which have been test-
ed and approved by Mercedes-Benz for your
vehicle model. Using other seat covers may
interfere with or prevent the deployment of
the side impact air bags. Contact your au-
thorized Mercedes-Benz Center for availabil-
ity.
Page 149 of 522

148 Controls in detailInstrument clusterA full view illustration of the instrument
cluster can be found in the “At a glance”
section of this manual (
page 26).
1Reset button
The instrument cluster is activated when
you
open a door
switch on the ignition (
page 37)
press the reset button1
switch on the exterior lamps
You can modify the instrument cluster set-
tings in the instrument cluster submenu of
the control system (
page 169).Adjusting instrument cluster illumina-
tion
Use the reset button1 to adjust the illu-
mination brightness for the instrument
cluster.
To brighten illumination
Turn the reset button1 in the instru-
ment cluster clockwise.
The instrument cluster illumination will
brighten.
To dim illumination
Turn the reset button1 in the instru-
ment cluster counterclockwise.
The instrument cluster illumination will
dim.
Warning!
G
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such
as speed or outside temperature, warning/
indicator lamps, malfunction/warning mes-
sages or the failure of any systems. Driving
characteristics may be impaired.
If you must continue to drive, please do so
with added caution. Visit an authorized
Mercedes-Benz Center as soon as possible.
i
The instrument cluster illumination is
dimmed or brightened automatically to suit am-
bient light conditions.
The instrument cluster illumination will also be
adjusted automatically when you switch on the
vehicle’s exterior lamps.
Page 398 of 522

397 Practical hints
What to do if …
On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may ap-
pear in the multifunction display.
For your convenience the messages are di-
vided into two sections:
Text messages (
page 398)
Symbol messages (
page 411)
Warning!
G
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such
as speed or outside temperature, warning/
indicator lamps, malfunction/warning mes-
sages or the failure of any systems. Driving
characteristics may be impaired.
If you must continue to drive, please do so
with added caution. Visit an authorized
Mercedes-Benz Center as soon as possible.i
Switching on the ignition causes all instru-
ment cluster lamps (except low beam headlamp
indicator lamp, high beam headlamp indicator
lamp, and turn signal indicator lamps unless ac-
tivated) as well as the multifunction display to
come on. Make sure the lamps and multifunction
display are in working order before starting your
journey.
Page 399 of 522

398 Practical hintsWhat to do if …Text messagesDisplay message
Possible cause/consequence
Possible solution
ABS
ABS, ESP
inoperative
See Operator’s Man.
ABS, ESP
® as well as PRE-SAFE
®
have switched off due to a malfunc-
tion.
BAS is also switched off.
The brake system is still functioning
normally but without the ABS, BAS,
ESP
® and PRE-SAFE
® available.
Continue driving with added caution.
Wheels will lock during hard braking, reduc-
ing steering capability.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases
the risk of an accident.
ABS, ESP
unavailable
See Operator’s Man.
ABS, ESP
® as well as PRE-SAFE
®
were deactivated because of insuffi-
cient power supply. The charging
voltage has fallen below 10 volts.
The brake system still functions nor-
mally but without the ABS, BAS,
ESP
® and PRE-SAFE
® available.
When the voltage is above this value again, the
ABS, ESP
® and PRE-SAFE
® are operational
again and the message should disappear.
If the message does not disappear:
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Page 400 of 522
399 Practical hints
What to do if …
Display message
Possible cause/consequence
Possible solution
Cruise control
--- mph(USA only)--- km/h(Canada only)
You have tried to switch on cruise
control below a speed of 20 mph
(30 km/h).
Drive faster than 20 mph (30 km/h) and
save the speed.
DISTRONIC
--- mph(USA only)--- km/h(Canada only)
You have tried to switch on Distronic
below a speed of 20 mph (30 km/h).
Drive faster than 20 mph (30 km/h) and
save the speed.
inoperative
The Distronic* is malfunctioning or
the display is malfunctioning.
Visit an authorized Mercedes-Benz Center
as soon as possible.
Page 403 of 522
402 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
ESP
inoperative
See Operator’s Man.
The ESP
® as well as BAS and
PRE-SAFE® have detected a mal-
function and switched off.
The ABS may not be operational.
The brake system is still functioning
normally but without the ABS, BAS,
ESP
® and PRE-SAFE
® available.
Continue driving with added caution.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases
the risk of an accident.
Page 408 of 522

407 Practical hints
What to do if …
Display
Possible cause/consequence
Possible solution
P
Gear selector lever
in Park position
You have tried to start the engine with the
KEYLESS-GO* start/stop button with the
gear selector lever not in positionP.
Place the gear selector lever in
positionP.
You have tried to turn off the engine with the
KEYLESS-GO* start/stop button with the
gear selector lever not in positionP.
P/N
Shift gear select. lever
to Neutral or Park
You have tried to start the engine with the
KEYLESS-GO* start/stop button while the
gear selector lever was in positionR orD.
Place the gear selector lever in positionP
orN. Make sure the brake pedal is de-
pressed.
PRE-SAFE
inoperative
See Operator’s Man.
PRE-SAFE
® itself has failed. All other occu-
pant safety systems, such as the air bags, are
still available.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
If ESP
® and PRE-SAFE
® malfunction messag-
es are displayed simultaneously, PRE-SAFE
®
has been deactivated as a result of these
malfunctions. All other occupant safety sys-
tems, such as the air bags, are still available.
Page 409 of 522

408 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
Check tires
Then restart
Run Flat Indicator
There was a warning message about a loss
in the tire inflation pressure and the Run Flat
Indicator has not been reactivated yet.
Make sure that the correct tire inflation pressure is set
for each tire.
Then reactivate the Run Flat Indicator.
Run Flat Indicator
inoperative
The Run Flat Indicator is malfunctioning.
Have the Run Flat Indicator checked by an authorized
Mercedes-Benz Center.
The Run Flat Indicator has been switched off
due to an error.
Tire pressure
Check tires
The Run Flat Indicator indicates that the
pressure is too low in one or more tires.
Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers. Observe the traffic sit-
uation around you.
Check and adjust tire inflation pressure as required
(page 342).
If necessary, change the wheel (
page 452).
Reactivate the Run Flat Indicator after adjusting the tire
inflation pressure values (
page 344).