Page 557 of 705
556 Practical hintsWhat to do if …?Problem
Possible cause/consequence
Suggested solution
59The front passenger front
air bag off indicator lamp
does not illuminate and/or
does not remain illuminat-
ed with the weight of a typ-
ical 12-month-old child in a
standard child restraint or
less on the front passen-
ger seat.
The system is malfunctioning.
Make sure there is nothing between seat cushion and child seat and
check installation of the child seat.
Make sure no objects applying supplemental weight onto the seat
are present.
Make sure no objects which apply forces to the seat are present
(e.g. objects such as books, briefcases etc. lodged behind or around
the seat, head restraints pushing against roof etc.). The system may
recognize such forces as supplemental weight.
If the front passenger front air bag off indicator lamp remains out,
have the system checked as soon as possible by an authorized
Mercedes-Benz Center. Do not transport a child on the front pas-
senger seat until the system has been repaired.
Also read and observe any messages in the multifunction display
and follow corrective steps (
page 564).
Warning!
G
If the59indicator lamp does
not illuminate or remains out with the
weight of a typical 12-month-old child in a
standard child restraint or less on the front
passenger seat, do not transport a child on
the front passenger seat until the system
has been repaired.
Page 558 of 705
557 Practical hints
What to do if …?
Vehicle status messages in the multi-function display
Warning and malfunction messages ap-
pear in the multifunction display located in
the instrument cluster.
Certain warning and malfunction messag-
es are accompanied by an audible signal.
High-priority messages are shown in red
on the multifunction display. Messages of
lower priority are also shown in yellow or
white.
Address these messages accordingly and
follow the additional instructions given in
this Operator’s Manual.Certain messages of high priority cannot
be cleared from the multifunction display
using# or L on the multifunction
steering wheel (
page 242).
Other messages of high priority and mes-
sages of less immediate priority can be
cleared from the multifunction display
using# or L. They are then stored
in the vehicle status message memory
(
page 253). Remember that clearing a
message will only make the message dis-
appear. Clearing a message will not cor-
rect the condition that caused the
message to appear.
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, warn-
ing/indicator lamps, malfunction/warning
messages 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.
Page 559 of 705
558 Practical hintsWhat 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 malfunction display.
For your convenience the messages are di-
vided into two sections:
Text messages (
page 559)
Symbol messages (
page 570)
Warning!
G
All categories of messages contain impor-
tant information which should be taken note
of and, where a malfunction is indicated, ad-
dressed as soon as possible at an autho-
rized Mercedes-Benz Center.
Failure to repair condition noted may cause
damage not covered by the Mercedes-Benz
Limited Warranty, or result in property dam-
age or personal injury.i
Switching on the ignition causes all instru-
ment cluster lamps (except high beam headlamp
indicator lamp and turn signal indicator lamps
unless activated) as well as the multifunction dis-
play to come on. Make sure the lamps and multi-
function display are in working order before
starting your journey.
Page 560 of 705
559 Practical hints
What to do if …?
Text messagesDisplay
Possible cause/consequence
Possible solution
Apply brake
to shift
from ’P’
You have tried to Shift the automatic trans-
mission to D, R or N without stepping on
the brake.
Step on brake.
USA only:
Cruise control
- - - mph
Canada only:
Cruise control
- - - km/h
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.
ESP
® is deactivated.
Activate ESP
® (page 72).
The automatic transmission is in position P,
R or N.
Shift the automatic transmission toD (
page 367).
The system is overheated.
Wait until the system cools down.
The vehicle is secured in place by the elec-
tric parking brake.
Release electric parking brake (
page 364).
Cruise control
inoperative
Cruise control is malfunctioning.
Have cruise control checked by an authorized Mercedes-Benz
Center.
Page 562 of 705
561 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
DISTRONIC PLUS
inoperative
DISTRONIC Plus* is malfunctioning.
Visit an authorized Mercedes-Benz Center as soon as possible.
DISTRONIC PLUS
passive
You have depressed the accelerator pedal,
DISTRONIC Plus* is no longer controlling
the speed of the vehicle.
Release the accelerator pedal.
USA only:
DISTRONIC PLUS
- - - mph
Canada only:
DISTRONIC PLUS
- - - km/h
You have attempted to activate DISTRONIC
Plus* at a speed below 20 mph (30 km / h)
without the vehicle in front being displayed
in the multifunction display (
page 385).
Drive faster than 20 mph (30 km / h) and activate DISTRONIC
Plus* again.
ESP
® is deactivated.
Activate ESP
® (page 72).
The automatic transmission is in position P,
R or N.
Shift the automatic transmission toD (
page 367).
The system is overheated.
Wait until the system cools down.
The vehicle is secured in place by the elec-
tric parking brake.
Release electric parking brake (
page 364).
The driver’s door is open and the drivers
seat belt is unbuckled.
Close the driver’s door and fasten your seat belt.
The hood is open.
Close the hood (
page 493).
Page 568 of 705
567 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Park Assist
inoperative
Park Assist* is unavailable due to a mal-
function.
Visit an authorized Mercedes-Benz Center as soon as possible.
PRE-SAFE
inoperative
See Owner's Manual
PRE-SAFE
® itself has failed. All other occu-
pant safety systems, such as the air bags,
are still available.
Visit an authorized Mercedes-Benz Center as soon as possible.
Check tires
then restart
Run Flat Indicator
There was a warning message about a loss
in tire inflation pressure and the Run Flat In-
dicator* has not been restarted yet.
Check and adjust tire inflation pressure as required
(page 514).
Then restart the Run Flat Indicator* (
page 515).
Radar sensor
deactivated
See Oper. Manual
You attempt to activate DISTRONIC Plus*
or Park Assist* even though you have
switched off the radar sensors* on the vehi-
cle.
Check if the radar sensors* may be switched on (
page 256).
Switch on the radar sensors* using the instrument cluster
control system.
Run Flat Indicator
inoperative
The Run Flat Indicator* is malfunctioning.
Visit an authorized Mercedes-Benz Center as soon as possible.
Service X
due
Service X must be carried out (
page 532).
Have the maintenance service carried out by an authorized
Mercedes-Benz Center.
Service X exceeded
by X days
by XXX mls (km)
Service X must be carried within the next ...
or before you have driven ... miles (kilome-
ters) (
page 532).
Have the maintenance service carried out by an authorized
Mercedes-Benz Center as soon as possible.
Shift to P or N
to start engine
You have attempted to start the engine
while the automatic transmission was set to
position R or D.
Shift the automatic transmission to P or N (
page 367).
Page 569 of 705
568 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Tire pressure
Check tires
The pressure has fallen significantly in one
or more tires.
Carefully bring the vehicle to a halt, avoiding abrupt steering
and braking maneuvers. Observe the traffic situation around
you.
Check and adjust tire inflation pressure as required
(page 511).
If necessary, change the wheel (
page 629).
Restart the Run Flat Indicator* after adjusting the tire infla-
tion pressure values (
page 516).
Tire pressure monitor
inoperative
The Advanced TPMS* or a wheel sensor is
malfunctioning.
Have the Advanced TPMS* checked by an authorized
Mercedes-Benz Center.
Tire pressure monitor
inoperative
No wheel sensors
The Advanced TPMS* is deactivated be-
cause wheels without proper sensors were
installed.
Have the wheel sensors installed by an authorized
Mercedes-Benz Center.
As soon as all wheels with sensors have been mounted, the
Advanced TPMS* is switched back on after driving for sever-
al minutes.
Warning!
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 the vehicle. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.
Page 570 of 705
569 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Tire pressure monitor
currently unavailable
The Advanced TPMS* is unable to monitor
the tire inflation pressure due to:
a nearby radio interference source
the on-board voltage is too low
excessive wheel sensor temperatures
As soon as the causes for the malfunction are no longer present,
the Advanced TPMS* automatically becomes active again after
a few minutes driving.
Tire pressures
displayed after driving
a few minutes
Vehicles with Advanced TPMS*:
The tire inflation pressure is being checked.
Drive the vehicle for a few minutes.
Visit workshop
without shifting gears
The automatic transmission cannot be shift-
ed out of the set position because of a mal-
function.
If the automatic transmission is shift to positionD:
Without changing the automatic transmission from
positionD, drive to an authorized Mercedes-Benz Center.
If the automatic transmission is shift to positionN, R or P:
Do not drive.
Consult an authorized Mercedes-Benz Center.
