2012 MERCEDES-BENZ GL SUV heating

Problem Possible causes/consequences and
M Solutions
The engin
ecannot be
started using the key. The on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating or interior
lighting ,and try to start the engine again.
If this doe snot work:
X Check the starter battery and charge it if necessary
(Y page 384).
or
X Jump-start the vehicle (Y page 386).
or
X Consult aqualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The key is in the
vehicle. Ad
oor is open. Therefore, the key can notb ed etected as easily.
X Close the door and tr ytostart the vehicle again. There is interferenc
efrom apowerfu lsource of radio waves.
X Start your vehicle with the key in the ignition lock. Doors
Important safety notes
G
WARNING
Only fo rthe Unite dKingdom: if the vehicle
has been locked with the key or with KEY-
LESS-GO, the double lock func tion is activa-
ted as standard. It is then not possible to open
the doors from inside the vehicle.
Therefore, do not leav eany people behind in
the vehicle, particularly children, elderly peo-
ple or people requiring special assistance .As
ar esult, they may not be able to free them-
selves in the event of an emergency. They
could be seriously or even fatally injured by
prolonged exposur etoextremely hig horlow
tempera tures, for example. In this case ,res-
cuin gpeople from outside the vehicle is diffi-
cult.
Deac tivate the interior motion sensor before
you lock the vehicle .The doors can then be
opened from the insid eafter the vehicl ehas
been locked from the outside. G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open adoor from inside the vehicle at any
time, even if it has been locked
R star tthe vehicle usin gakey which has been
left in the vehicle
R release the electric parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Alway stake the key with you
when leaving the vehicle, even if you are only
leaving it for ashort time. Unlocking and opening th
edoors
from the inside
For all countries except the United King-
dom: you can open adoor from inside the
vehicle even if it has been locked.
If the vehicle has been locked with the key or
with KEYLESS -GO, opening adoor from the
inside will trigger the anti-thef talarm system.
Switch off the alarm (Y page 71).82
DoorsOpening and closing

Seats
Important safety notes
G
WARNING
The seat scan still be adjusted when there is
no key in the ignition lock. For this reason,
children shoul dnever be left unsupervised in
the vehicle. They could adjust the seats and
becom etrapped. G
WARNING
Only adjus tthe driver's seat when the vehicle
is stationary .You will otherwise be distracted
from the road and traffic condition sand you
could los econtrol of the vehicle as aresult of
the seat moving. This could cause an acci-
dent. G
WARNING
If you adjust the seat height carelessly, you or
others could be trapped and thereby injured.
Children in particula rcould unintentionally
press the buttons to electrically adjust the
seats and becom etrapped.
Take care that:
R while moving th eseats, your hands do not
get under the lever assembly of the seat
adjustmen tsystem.
R children in the vehicle do not slid etheir
hands unde rthe levers. G
WARNING
Make sur ethat nobody can becom etrapped
when adjustin gthe seats.
Observ ethe note sonairbags.
Secur echildren as recommended; see the
"Childre ninthe vehicle" section. G
WARNING
Make sur ethat the bac kofyour head is sup-
ported at eye level by the cen tralarea of the
head restraint. If your head is not supported
correctly by th ehead restraint ,you coul dsuf-
fer asever eneck injury in the event of an accident
.Never driv eifthe head rest raints are
not engaged and set correctly. G
WARNING
As eat belt can only offer its intended degree
of protection when the back rest is almost ver-
tical and the occupan tiss itting upright. Avoid
seat positions that do not allow the seat belt
to be routed correctly. Adjust the backrest so
that it is as upright as possible .Never travel
with the back rest reclined too fa rbackwards.
You could otherwise be seriousl yoreven
fatally injured in th eevent of an accident or
sudden braking.
! To avoid damag etothe seats and the seat
heating, observe the followin ginformation:
R do not spill any liquids on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
R if the sea tcover sare damp or wet, do not
switc hont he seat heating. The seat
heating should also not be used to dry
the seats.
R clea nthe seat cover sasrecommended;
see "In terior care".
R do not transport heav yloads on the
seats. Do not plac eshar pobjects on the
seat cushions ,e.g. knives, nails or tools.
Th es eats should only be occupied by
passengers, if possible.
R when the seat heatin gisinoperation ,do
not cover the seats with insulating mate-
rials, e.g. blanke ts,c oats, bags, seat cov-
ers, child seats or booster seats.
! Make sure that ther eare no objects in the
footwell or behind th eseats when moving
the seat back .There is arisk that the seats
and/or the objects could be damaged.
i The head restraint scannot be removed
from the fron tseats. The rear-compart-
men thead restraints, however ,can be
removed (Y page 104).
For more information ,contac taqualified
specialist workshop. Seats
101Seats, steering wheel and mirrors Z

i
Further related subjects:
R Luggage compartment enlargement
(folding the 2nd row of se atsf orwards)
(Y page 341)
R Folding the seats in the 3r drow for-
wards/back (Y page 105)
Folding down th eseats
The seats can be folded dow nelectrically if
the vehicle is stationary and the respec tive
rea rdoor is open. X
Press button :.
The head restraint retracts, the backrest
folds forwards and the seat folds forwards.
The seat can be manually returne dtoits
initial position (Y page 106). Adjusting th
emulticon tour seat
Yo uc an set the multicontour seat using
COMAND Online. See the separat eCOMAND
Onli neOperating Instructions. Adjusting th
e4-way lumbar support :
To rais ethe bac krest contour
; To soften the backrest contour
= To lower the backrest contour
? To harden the backrest contour
You can adjust the contour of the fr ontseat
bac krest sindividually to provide optimum
support for your back. Switching th
eseat heating on/off
Switching on/off G
WARNING
Repeatedly settin gthe seat heating to level
3 ma yresult in excessiv eseat temperatures.
The health of passengers that have limited
temperatur esensitivit yoralimited ability to
react to excessively high temperatures may
be affected or they may even suffer burn-like
injuries. Therefore, do not use seat heating
level 3repeatedly. 108
SeatsSeats, steering wheel and mirrors

Driver's and front-p
assenger seat Rear seats
Th
et hree red indicat or lampsinthebutton
indicat ethe heating lev el youhave selected.
The system automatically switches down
from level 3to level 2after approximately
eight minutes.
The system automatically switches down
from level 2to level 1after approxima tely ten
minutes.
The system automatically switches off
approximately 35 minutes after it is set to
level 1.
You can set the distribution of the heated
sections of the seat cushion and backrest.
You can find information about this in the
separate operatin ginstructions.
X Make sure that the key is in position 1or
2 in the ignition lock.
X To switch on: pressbutton :repeatedly
until the desired heating level is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out. i
If the batter yvoltage is too low, the seat
heatin gmay switch off.
Problems with the seat heating The seat heating has switched off prema-
turely or cannot be switched on. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
X
Switc hoff elect rical consumers that you do
not need, such as the rear window heating
or interior lighting. Switchin
gthe seat ventilation on/off
Switchin gon/off The three blue indicator lamps in the buttons
indicat
ethe ven tilation level you have selec-
ted.
X Make sure that the key is in position 1or
2 in the ignition lock.
X To switch on: press button:repeatedly
until the desired ventilation level is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
i If the batter yvoltage is too low, the seat
ven tilation may switch off.
i You can open the side windows and the
sliding sunroof using the "Convenience
opening" featur e(Ypage 90). The seat ven-
tilation of the driver' sseat automatically
switches to the highest level. Seats
109Seats, steering wheel and mirrors Z

Problems wit
hthe seat ventilation Th
es eat ven tilation has switched off prema-
turely or cannot be switched on. The vehicle's
electrical system voltage is too low because
too many electrical consumer sare switched
on.
X Switch off electrica lconsumers that you do
not need, such as the rea rwindow heating
or interior lighting. Steering wheel
Important safet
ynotes G
WARNING
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving, or
drivin gwithout the steering wheel adjustment
featur elocked coul dcause the driver to lose
control of the vehicle.
The electrical steering wheel adjustment fea-
ture can be operated at any time. Therefore,
do not leave children unattended in the vehi-
cle, or with access to an unlocked vehicle. A
child's unsupervised access to avehicle could
result in an accident and/or serious personal
injury. Adjusting the steering whee
lman-
ually :
Release lever
; To adjus tthe steering wheel height
= To adjust the steering wheel position
(fore-and-af tadjustment)
X Push release lever :down completely.
The steerin gcolum nisu nlocked.
X Adjus tthe steering wheel to the desired
position.
X Push release lever :up completely.
The steering column is locked.
X Chec kifthe steering column is locked.
When doing so, tr ytopush the steering
wheel up or down or try to move it in the
fore-and-aft direction. Adjusting the steering wheel electri-
cally :
To adjust the steering wheel height
; To adjust the steering wheel position
(fore-and-aft adjustment) 110
Steering wheelSeats, steerin
gwhee land mirrors

i
Further related subjects:
R EASY-ENT RY/EXIT feature
(Y page 111)
R storing setting s(Ypag e115) Ste
ering wheel heating
Switchin gon/off X
Make sure that the key is in position 2in
the ignition lock.
X To switch on/off: turn the lever in the
direction of arrow :or;.
Indicator lamp =lights up or goe sout.
Vehicles without KEYLESS-GO: when you
remove the key from the ignition lock, the
steering wheel heating is switched off.
Vehicles with KEYLESS-GO: when you switch
off the ignition and open the driver' sdoor, the
steerin gwheel heating is switched off.
Problems wit hthe steering whee lheat-
ing The steerin
gwheel heating has switched
itsel foff prematurely or cannot be switched
on. Th evehicle' selectrical system voltage is
too low because too many electrical consum-
ers are switched on.
X Switc hoff elect rical consumers that you do
not need, such as the rear window heating
or inte rior lighting. EASY-ENTRY/EXIT feature
Important safety notes G
WARNING
Make sur ethat nobody can becom etrapped
when you activate th eEASY-ENTRY/EXI Tfea-
ture.
If there is arisk of someon ebecomin gtrap-
ped, stop th eadjustment procedure. To halt
the procedure:
R press the steerin gcolum nadjustment but-
ton.
R briefly press one of the memory fun ction
position buttons.
The steerin gcolum nstops moving immedi-
ately.
Do not keep the memory function position
button pressed down, otherwise the memory
function will start and the steerin gwheel and
seat will begin to move.
Never leav echildren unsupervised in the vehi-
cle. They coul dopen the driver' sdoor and
thereby unin tentionally activate the EASY-
ENTRY feature and become trapped.
The EASY-ENTRY/EX ITfeature make sgetting
in and out of your vehicle easier.
You can activa teand deactivat ethe EASY-
ENTRY/ EXIT feature in th eon-board com-
puter (Y page285).
Positio nofthe steering whee lwhen the
EASY-ENTRY/EXIT feature is active Th
es teering whee ltilts upwards if you:
R remov ethe key from the ignition lock
R open the driver's door and KEYL ESS-GO is
in position 1
R ope nthe driver's door and the key is in
position 0or 1in the ignition lock
i The steerin gwheel only moves upwards if
it has not already reached the upper end
stop. Steering wheel
111Seats, steering whee land mirrors Z

X
Make sur ethat the key is in position 1or
2 in the ignition lock.
X Press button :for the left-hand exterior
mirror or button ;for the right-hand exte-
rior mirror.
The indicator lam pint he corresponding
button lights up in red.
The indicator lam pgoes out again after
some time. You can adjust the selected
mirror using adjustment button =as long
as the indicator lam pislit.
X Press adjustment button =up, down, or
to the left or right until you have adjusted
the exterior mirror to the correct position.
You should have agood overview of traffic
conditions.
The convex exterior mirror sprovide alarger
field of vision.
The exterior mirrors are automatically heated
if the rear window heating is switched on and
the outside temperature is low.
Folding the exterior mirrors in or out
electrically X
Make sure that the key is in position 1or
2 in the ignition lock.
X Briefly press button :.
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate. Setting the exterior mirrors If the battery has been disconnected or com-
pletely discharged
,the exterior mirrors must
be reset .The exterior mirrors will otherwise
not fol dinwhen you selec tthe "Fold in mir-
ror sw hen locking" func tion in the on-board
computer (Y page 285).
X Make sure that the key is in position 1in
the ignition lock.
X Briefl ypres sbutton :.
Folding the exterior mirrors in/out
automatically If the "Fold in mirrors when locking" function
is activated in the on-board computer:
(Y
page 285)
R the exterior mirrors fold in automatically as
soo nasyou lock the vehicle from the out-
side.
R the exterior mirror sfold out again automat-
ically as soon as you unloc kthe vehicle and
then open the driver's or front-passenger
door.
Exterior mir rorp ushe dout of position If an exterior mirro
rhas been pushe dout of
position, proceed as follows:
X Vehicles without electrically folding
exterior mirrors: move the exterior mirror
into the correct position manually.
X Vehicles with electrically folding exte-
rior mirrors: press and hold button for
folding the mirrors :(Ypage 113 )until you
hea rac lick and then the mirror engage in
position.
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
(Y page 112). Mirrors
113Seats, steerin gwhee land mirrors Z

Control panel for THERMATIC automatic clima
tecontrol (2-zone) :
Setsthe tem perature, left (Y page 143)
; Demists th ewindscree n(Ypage 145)
= Switches th eZONE fu nction on/of f(Y page 145)
? Activates/deactivate scooling with ai rdehumidi fication (Y page141)ora ctivates/deac-
tivates the residual heating functio n(Ypage 14 7)
A Switches the rear window heating on/off (Y page146)
B Sets the tempera ture,right (Y page 143)
C Activates/deactivates air-recirculation mode (Y page 146)
D Setsthe air distribution (Y page 144)
E Increase sthe airflo w(Ypage 14 4)
F Reduces the airflow (Y page 144)
G Switches climate control on/off (Y page 141)
H Setsclimate control to automatic mode (Y page 142)Rear-
compartment control panel onl yincombination with special equipmen tseat heating
: Controls the rear-compartment climate control automatically
; Switches rear-compartment climate control on/off Overview of climat
econtrol systems
137Climatecontrol Z