Problems with the rear window defroster
Problem Possible causes/consequences and
0050
0050Solutions The rear window
defroster has
deactivated
prematurely or cannot
be activated. The battery has not been sufficiently charged.
X
Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again. Activating/deactivating air-
recirculation mode
General notes You can also temporarily deactivate the flow
of fresh air manually if unpleasant odors are
entering the vehicle from outside. The air
already inside the vehicle will then be
recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
Activating/deactivating X
Turn the SmartKey to position 2in the
ignition lock (Y page 171).
X To activate: press the0072rocker switch
up or down.
The indicator lamp in the 0072rocker
switch lights up.
i Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures. The indicator
lamp in the 0072rocker switch is not lit
when automatic air-recirculation mode is
activated.
Outside air is added after about
30 minutes.
X To deactivate: press the0072rocker
switch up or down.
The indicator lamp in the 0072rocker
switch goes out. i
Air-recirculation mode deactivates
automatically:
R after approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes at
outside temperatures above
approximately 41 ‡(5 †) if the "Cooling
with air dehumidification" function is
activated Activating/deactivating the residual
heat function
General notes Vehicles with rear-compartment climate
control:
once the engine is switched off, it is
possible to make use of the residual heat of
the engine to continue heating or ventilating
the rear and front compartment of the vehicle
for approximately 15 minutes. If the "Residual
heat" function is set for only the front or only
the rear compartment, it is possible to
continue heating or ventilating for
approximately 30 minutes.
Vehicles without rear-compartment
climate control: once the engine is switched
off, it is possible to make use of the residual
heat of the engine to continue heating or
ventilating the front compartment of the
vehicle for approximately 30 minutes. Operating the climate control systems
163Climate control
R
the transmission must be in position D.
R the driver's door must be closed when you
shift from Pto Dor your seat belt must be
fastened.
R the front-passenger door and rear doors
must be closed.
Activating X
Briefly pull the cruise control lever towards
you 0044or press it up 0043or down 0087.
DISTRONIC PLUS is selected.
X To adjust the set speed in 1 mph
increments (1 km/h increments): briefly
press the cruise control lever up 0043to the
pressure point for a higher speed, or down
0087 for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced.
or
X To adjust the set speed in 5 mph
increments (10 km/h increments):
briefly press the cruise control lever
up 0043 past the pressure point for a higher
speed, or down 0087for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced.
X Remove your foot from the accelerator
pedal.
Your vehicle adapts its speed to that of the
vehicle in front, but only up to the desired
stored speed. i
If you do not fully release the accelerator
pedal, the DISTRONIC PLUS Passive
DISTRONIC PLUS Passive
message appears in the multifunction
display. The set distance to a slower-
moving vehicle in front will then not be
maintained. You will be driving at the speed
you determine by the position of the
accelerator pedal.
You can also activate DISTRONIC PLUS when
stationary. The lowest speed that can be set
is 20 mph (30 km/h).
X Briefly pull the cruise control lever towards
you 0044or press it up 0043or down 0087.
DISTRONIC PLUS is selected.
Activating at the current speed/last
stored speed G
WARNING
If you call up the stored speed and it differs
from the current speed, the vehicle
accelerates or decelerates. If you do not know
the stored speed, the vehicle could accelerate
or brake unexpectedly. There is a risk of an
accident.
Pay attention to the road and traffic
conditions before calling up the stored speed.
If you do not know the stored speed, store the
desired speed again. 204
Driving systemsDriving an
d parking
Display messages Possible causes/consequences and
0050
0050Solutions Radar Sensors
Radar Sensors
Dirty See Dirty See
Operator's Manual Operator's Manual At least one of the following driving systems or driving safety
systems is temporarily inoperative:
R
PRE-SAFE ®
PLUS
R PRE-SAFE ®
Brake
R COLLISION PREVENTION ASSIST
R Active Lane Keeping Assist
R Active Blind Spot Assist
R DISTRONIC PLUS
Possible causes are:
R the sensors in the radiator trim and/or in the bumpers are dirty.
R the function of the driving system and/or driving safety system
is impaired due to heavy rain or snow.
When the causes stated above no longer apply, the display
message disappears. All driving systems/driving safety systems
are operative again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 190).
X Switch off the engine.
X Clean the sensors in the following locations ( Ypage 358):
R in the radiator trim
R in the front bumper
R in the rear bumper, particularly in the middle of the rear
bumper
X Restart the engine.
The display message disappears. Check Left Rear Check Left Rear
Belt See Belt See
Operator's Manual Operator's Manual
or
Check Right Check Right
Rear Belt See
Rear Belt See
Operator's Manual Operator's Manual The seat belt buckle extender on the right or left of the rear
compartment is not in the predefined position. The belt strap may
be jammed in the belt tongue.
G WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Release the jamming.
X Repeat the seat belt fastening procedure. 274
Display
messagesOn-board computer and displays
Display messages Possible causes/consequences and
0050
0050Solutions The seat belt buckle extender on the right or left of the rear
compartment is not in the predefined position. The seat belt
buckle extender may be jammed.
G WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury.
X Move the seat cushion forwards ( Ypage 113) and remove the
cause of the jamming.
X Repeat the seat belt fastening procedure. The seat belt buckle extender on the right or left of the rear
compartment is not in the predefined position. The seat belt may
be locked.
G WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury.
X Completely take off your seat belt.
X Repeat the seat belt fastening procedure. The seat belt buckle extender on the right or left of the rear
compartment is not in the predefined position. There is not enough
belt slack in the system.
G WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury.
X Loosen the seat belt.
X Repeat the seat belt fastening procedure. The seat belt buckle extender on the right or left of the rear
compartment is not in the predefined position. The assistance
measures specified have been carried out. There is still a
malfunction.
G WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury.
X Visit a qualified specialist workshop. Display
messages
275On-board computer and displays Z
Display messages Possible causes/consequences and
0050
0050Solutions 0075
Rear Left Rear Left
Malfunction Malfunction
Service Required Service Required
or
Rear Right Rear Right
Malfunction
Malfunction
Service Required Service Required G
WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Perform the specified assistance measures when display
message Check CheckLeft
LeftRear
Rear Belt
BeltSee
SeeOperator's
Operator's Manual
Manual
or Check Right Rear Belt See Operator's Manual
Check Right Rear Belt See Operator's Manual is
shown (Y page 274).
If the display message does not disappear:
X Visit a qualified specialist workshop immediately. 0075
Rear Center Rear Center
Malfunction Malfunction
Service Required Service Required SRS has malfunctioned at the rear center. The
0075warning lamp
also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. 0075
Left Side Curtain Left Side Curtain
Airbag Airbag
Malfunction
Malfunction
Service Required
Service Required
or Right Side Right Side
Curtain Airbag
Curtain Airbag
Malfunction Malfunction
Service Required Service Required There is a malfunction in the left-hand or right-hand window
curtain air bag. The
0075warning lamp also lights up in the
instrument cluster.
G WARNING
The left or right window curtain air bag may either be triggered
unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. Display
messages
277On-board computer and displays Z
Display messages Possible causes/consequences and
0050
0050Solutions X
Wait for a period of at least 60 seconds until the necessary
system checks have been completed.
X Make sure that the display messages do not appear in the
multifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIR BAG OFF indicator
lamp remains lit or goes out depends on how OCS classifies the
occupant.
If the conditions are not fulfilled, the system is not operating
correctly.
X Visit a qualified specialist workshop immediately.
For further information about the Occupant Classification System,
see (Y page 51). Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed. Display messages Possible causes/consequences and
0050 0050Solutions 0049
Check Left Check Left
Cornering Light Cornering Light
or
Check Right
Check Right
Cornering Light Cornering Light The left or right-hand cornering light is defective.
X
Visit a qualified specialist workshop. 0049
Check Left Low Check Left Low
Beam Beam
orCheck
Check
Right Low Beam
Right Low Beam The left or right-hand low-beam headlamp is defective.
X
Visit a qualified specialist workshop. 0049
Check Rear Left Check Rear Left
Turn Signal Turn Signal
or
Check Rear Right
Check Rear Right
Turn Signal Turn Signal The rear left-hand or rear right-hand turn signal is defective.
X
Visit a qualified specialist workshop. 280
Display
messagesOn-board computer and displays
Stowage compartment under the armrest
X
To open: press button 0043or0044 and fold
the armrest to the left or right.
Depending on the vehicle's equipment, a USB
port, an AUX-IN jack or a Media Interface are
installed in the stowage compartment. A
Media Interface is a universal interface for
portable audio or video equipment, e.g. for an
iPod ®
, iPhone ®
or MP3 player (see the
separate COMAND operating instructions).
Stowage compartment under the driver's
seat and front-passenger seat G
WARNING
If you exceed the maximum load for the
stowage compartment, the cover may not be
able to restrain the items. Items may be
thrown out of the stowage compartment and
hit vehicle occupants. There is a risk of injury,
particularly in the event of sudden braking or
a sudden change in direction.
Never exceed the maximum permissible load
for the stowage compartment. Stow and
secure heavy objects in the trunk.
The maximum permissible load of the
stowage compartment is 3.3 lbs (1.5 kg). X
To open: pull handle 0043up and fold
cover 0044forwards.
Stowage compartments in the doors You can store items such as a rolled up
fluorescent jacket and a small umbrella in
stowage compartment
0044in the doors.
In doors 0043you can store bottles with a
capacity of up to 34 fl. oz. (1.0 liter).
Stowage space in the rear Stowage compartment in the rear seat
armrest318
Stowage areasStowage and features
Vehicles with a rear bench seat:
X
To open: fold down the seat armrest.
X Pull handle 0043and fold the armrests
upwards. Vehicles with electrically adjustable outer
seats:
X To open: fold down the seat armrest.
X Pull up on handle 0043and fold the armrest
upwards.
Stowage compartment in the rear-
compartment center console Vehicles with individual seats and center
console in the rear:
X Pull up on handle 0043and fold the armrest
upwards.
Depending on the vehicle's equipment, a USB
port, an AUX-IN jack, a mobile phone bracket
or a 115 V or 230 V socket are installed in the
stowage compartment. Stowage box in the rear seat backrest
!
Do not sit on or support your body weight
on the rear seat armrest when it is folded
down, as you could otherwise damage it. Vehicles with a rear bench seat:
X
To open: fold down the rear armrest.
X Pull handle 0043and fold down cover 0044. Vehicles with individual seats and center
console in the rear:
X
To open: fold down the rear armrest.
X Pull handle 0043and fold down cover 0044.
Depending on the vehicle's equipment, a DVD
player is installed instead of a stowage
compartment.
Folding table G
WARNING
If the folding table is folded out while the
vehicle is in motion, passengers can be
thrown against it, particularly in the event of
an accident, heavy braking or a sudden
change of direction. There is a risk of injury. Stowage areas
319Stowage and features
Z