
Vehicle equipment ............................
412
Where will I find ...? .......................... 412
Vehicle status messages in the
multifunction display ....................... 414
What to do if … .................................. 450
Unlocking/locking manually ...........460
Replacing SmartKey batteries ......... 461
Replacing bulbs ................................. 463
Replacing wiper blades ....................464
Flat tire .............................................. 465
Battery ............................................... 469
Jump starting .................................... 471
Towing the vehicle ............................473
Fuses .................................................. 476 411Practical hints
216_AKB; 3; 90, en-US
d2ureepe,
Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 411

Text messages
Safety systems Display messages
Possible causes/consequences and
X SolutionsPRE-SAFE Inoperativ
e See
Oper.
Manual
The PRE-SAFE
®
system has failed. All other occupant safety
systems, such as the air bags, are still available.
X Contact an authorized Mercedes-Benz Center as soon as
possible. PRE-SAFE Function
Currently
Limited
See Oper.
Manual
The PRE-SAFE
®
Brake is temporarily unavailable.
The PRE-SAFE ®
Brake is deactivated because:
R the DISTRONIC PLUS cover in the radiator grille is dirty
R the area
around the sensors in the front or the rear bumper
is dirty
R its function is impaired as a result of heavy precipitation
R the radar sensor system is temporarily inoperative due to
electromagnetic interference near television and radio
transmitter stations, toll stations, speed measuring
systems, etc.
R the system is out of the operating temperature range
R the battery voltage is insufficient
The PRE-SAFE ®
Brake becomes operational again and the
message in the multifunction display disappears when:
R dirt on the radiator grille has fallen off while driving (e.g.
slush or snow)
R the system recognizes full sensor availability (due to
lessening rain or the road surface drying)
R the system is within the operating temperature range
If the message in the multifunction display does not
disappear:
X Clean the DISTRONIC PLUS cover in the radiator grille
(Y page 406).
X Clean the front and the rear bumper ( Y page 406).
X Restart the vehicle.
X Wait until the battery recovers. PRE-SAFE Function
Limited
See Oper.
Manual
The PRE-SAFE
®
Brake is unavailable due to a malfunction.
The BAS PLUS may also be unavailable.
X Contact an authorized Mercedes-Benz Center as soon as
possible. 416
Vehicle status messages in the multifunction display
Practical hints
216_AKB; 3; 90, en-US
d2ureepe,
Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 416

Display messages
Possible causes/consequences and
X SolutionsDISTRONIC
PLUS Currently
Unavailabl
e See
Oper.
Manual The DISTRONIC PLUS is temporarily unavailable.
The DISTRONIC PLUS is deactivated because:
R
the DISTRONIC PLUS cover in the radiator grille is dirty
R its function is impaired as a result of heavy precipitation
R the radar sensor system is temporarily inoperative due to
electromagnetic interference near television and radio
transmitter stations, toll stations, speed measuring
systems, etc.
R the radar sensors do not sense any other vehicles or
objects, i.e. road sign or similar to this, for a long time
R the system is out of the operating temperature range
R the battery voltage is insufficient
X If necessary, clean the DISTRONIC PLUS cover in the
radiator grille (Y
page 406).
X Restart the vehicle.
X Try activating the DISTRONIC PLUS again later.
X Wait until the system is within the operating temperature
range or the battery recovers.
The DISTRONIC PLUS becomes operational again without the
engine being restarted when:
R dirt on the radiator grille has fallen off while driving (e.g.
slush or snow)
R the system recognizes full sensor availability (due to
lessening rain or the road surface drying)
R the message in the multifunction display disappears DISTRONIC
PLUS Inoperativ
e The DISTRONIC PLUS is malfunctioning.
The BAS PLUS and the PRE-SAFE
®
Brake are also not
available.
X Contact an authorized Mercedes-Benz Center as soon as
possible. DISTRONIC
PLUS Override You have accelerated. The DISTRONIC PLUS has switched off.
X
Stop accelerating. Vehicle status messages in the multifunction display
421
Practical hints
216_AKB; 3; 90, en-US
d2ureepe,Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 421 Z

Display messages
Possible causes/consequences and
X SolutionsDISTRONIC
PLUS - - - mph One of the activation conditions for the DISTRONIC PLUS has
not been fulfilled. You may have attempted to set a speed
below 20 mph (
30 km/h)
.
X Drive faster than 20 mph (30 km/h) if the situation allows
and set the speed.
X Check the activation conditions for the DISTRONIC PLUS
(Y page 309). HOLD Off The HOLD function switched off because the vehicle was
sliding, for example on a slippery surface.
X
Activate the HOLD function later. Park
Assist Currently
Unavailabl
e See
Oper.
Manual The Park Assist is deactivated because the area around the
sensors in the front or the rear bumper is dirty.
X
Clean the front and rear bumper ( Y page 406). The Park Assist is deactivated because the battery voltage is
insufficient.
X
Have the battery checked at an authorized Mercedes-Benz
Center. The Park Assist is switched off because the radar sensor
system is temporarily inoperative due to electromagnetic
interference near television and radio transmitter stations,
toll stations, speed measuring systems, etc.
X
Wait until the message in the multifunction display
disappears. Park
Assist Inoperativ
e The Park Assist is malfunctioning.
X
Contact an authorized Mercedes-Benz Center as soon as
possible. 422
Vehicle status messages in the multifunction display
Practical hints
216_AKB; 3; 90, en-US
d2ureepe,
Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 422

Display messages
Possible causes/consequences and
X SolutionsBlind
Spot
Assist Currently
Unavailabl
e See
Oper.
Manual The Blind Spot Assist is deactivated because the area around
the sensors in the front or the rear bumper is dirty.
X
Clean the front and rear bumper ( Y page 406). The Blind Spot Assist is deactivated because the battery
voltage is insufficient.
X
Have the battery checked at an authorized Mercedes-Benz
Center. The Blind Spot Assist is switched off because the radar sensor
system is temporarily inoperative due to electromagnetic
interference near television and radio transmitter stations,
toll stations, speed measuring systems, etc.
X
Wait until the message in the multifunction display
disappears. Blind
Spot
Assist Inoperativ
e The Blind Spot Assist is malfunctioning.
X
Contact an authorized Mercedes-Benz Center as soon as
possible. Parking
Guidance Currently
Unavailabl
e See
Oper.
Manual The Advanced Parking Guidance is deactivated because the
area around the sensors in the front or the rear bumper is
dirty.
X
Clean the front and rear bumper ( Y page 406). The Advanced Parking Guidance is deactivated because the
battery voltage is insufficient.
X
Have the battery checked at an authorized Mercedes-Benz
Center. The Advanced Parking Guidance is switched off because the
radar sensor system is temporarily inoperative due to
electromagnetic interference near television and radio
transmitter
stations,
toll stations, speed measuring systems,
etc.
X Wait to see if the interference is temporary. Try in a location
where the interfering source might not be present. Vehicle status messages in the multifunction display
423
Practical hints
216_AKB; 3; 90, en-US
d2ureepe,Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 423 Z

Display messages
Possible causes/consequences and
X SolutionsService
Required Do Not
Shift
Gears The automatic transmission cannot be shifted out of the
current transmission position because of a malfunction.
If the automatic transmission is in drive position D:
X
Without shifting the automatic transmission out of drive
position D, drive to an authorized Mercedes-Benz Center.
If the automatic transmission is set to position neutral
position N, reverse gear R or park position P:
X Do not drive.
X Contact an authorized Mercedes-Benz Center or call
Roadside Assistance. Only
Shift to
Position
'P' When
Vehicle
Is
Stationary You have attempted to shift the automatic transmission into
park position P although the vehicle was still in motion.
X
Stop your vehicle as soon as it is safe to do so.
X Shift the automatic transmission to park position P.
X Engage the electronic parking brake. Shift to
P or N to Start
Engine You have attempted to start the engine while the automatic
transmission was in reverse gear
R or drive position D.
X Shift the automatic transmission into park position P or
neutral position N
. Make sure the brake pedal is depressed. Auxiliary
Battery
(message
appears in
white) Malfunctio
n The backup battery for the automatic transmission is no
longer charging.
X
Contact an authorized Mercedes-Benz Center. Auxiliary
Battery
(message
appears in
red) Malfunctio
n The backup battery for the automatic transmission is
discharged. In case of failure of the on-board electrical
system, you may not be able change transmission positions.
X
Stop the vehicle in a safe location or as soon as it is safe
to do so.
X Engage the electronic parking brake.
X Do not drive any further.
X Contact an authorized Mercedes-Benz Center or call
Roadside Assistance. Vehicle status messages in the multifunction display
425
Practical hints
216_AKB; 3; 90, en-US
d2ureepe,Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 425 Z

Display messages
Possible causes/consequences and
X SolutionsWheel
Sensor(s) Missing At least one sensor is defect (e.g. battery is empty).
The respective tire is indicated by
– – instead of the tire
inflation pressure in the multifunction display.
X Have the Advanced TPMS checked at an authorized
Mercedes-Benz Center.
X Have the wheel sensors installed at an authorized
Mercedes-Benz Center. At least one wheel without appropriate wheel sensors is
mounted (e.g. spare wheel).
The respective tire is indicated by
– – instead of the tire
inflation pressure in the multifunction display.
X Have the Advanced TPMS checked at an authorized
Mercedes-Benz Center.
X Have the wheel sensors installed at an authorized
Mercedes-Benz Center. Tire
Pressure
Monitor Currently
Unavailabl
e The Advanced TPMS cannot monitor the tire inflation pressure
due to a nearby radio interference source or insufficient
power supply.
As
soon
as the causes of the malfunction have been rectified,
the Advanced TPMS becomes active again automatically after
a few minutes of driving. Tire
Pressure
Please
Rectify The tire inflation pressure is too low in at least one tire.
or
The tire inflation pressures of the individual tires differ from
each other significantly.
The tire inflation pressure values are shown in the
multifunction display.
X
Check and correct tire inflation pressure as required
(Y page 377).
X Restart the Advanced TMPS ( Y page 380).Caution
Tire
Defect At least one tire is deflating.
The respective tire is indicated in the multifunction display.
X
Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers.
X If necessary, change the wheel (Y page 465). Vehicle status messages in the multifunction display
427
Practical hints
216_AKB; 3; 90, en-US
d2ureepe,Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 427 Z

Display messages
Possible causes/consequences and
X Solutions$
(USA only)
J
(Canada
only) ABS and
ESC
Currently
Unavailabl
e See
Oper.
Manual In addition, the yellow ESC warning lamp
÷, the yellow
ESC OFF warning lamp å, and the yellow ABS indicator
lamp ! come on.
The brake system still functions normally but due to
insufficient power supply, the ABS, the BAS, the BAS PLUS,
the ESC, the hill-start assist system, the HOLD function, the
Adaptive Brake Lights, the PRE-SAFE ®
system, and the
PRE-SAFE ®
Brake are unavailable.
X Continue driving with added caution. Wheels may lock
during hard braking, reducing steering capability.
X Adjust driving to be consistent with reduced braking
responsiveness.
When the voltage is above the required value again, the ABS,
the BAS,
the BAS PLUS, the ESC, the hill-start assist system,
the HOLD function, the Adaptive Brake Lights, the
PRE-SAFE ®
system, and the PRE-SAFE ®
Brake are operational
again and the message should disappear.
If the message does not disappear:
X Have the alternator and the battery checked.
Failure to follow these instructions increases the risk of an
accident. $
(USA only)
J
(Canada
only) EBR, ABS,
and ESC
Inoperativ
e See
Oper.
Manual In addition, the yellow ESC warning lamp
÷, the yellow
ESC OFF warning lamp å, and the yellow ABS indicator
lamp ! come on and an acoustic warning sounds.
The brake system is still functioning normally but due to a
malfunction, the ABS, the BAS, the BAS PLUS, the EBP, the
ESC, the
HOLD function, the Adaptive Brake Lights, the PRE-
SAFE ®
system, and the PRE-SAFE ®
Brake are unavailable.
X Continue driving with added caution. Wheels may lock
during hard braking, reducing steering capability.
X Adjust driving to be consistent with reduced braking
responsiveness.
X 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. 430
Vehicle status messages in the multifunction display
Practical hints
216_AKB; 3; 90, en-US
d2ureepe,
Version: 2.11.8.1 2009-05-15T11:47:50+02:00 - Seite 430