heating MERCEDES-BENZ ML SUV 2008 Service Manual

Troubleshooting
293Problem Possible cause/consequence Suggested solutions
The yellow reserve fuel warning
lamp comes on while the engine
is running. The fuel level has fallen below the
reserve range. The operation of
the auxiliary heating* can no lon-
ger be guaranteed. X
Refuel at the nearest filling station. Warning tones
Problem Possible cause/consequence Suggested solutions
The anti-theft warning alarm* is
triggered. You have opened the vehicle
using the emergency key element
without deactivating the anti-
theft alarm system* first. X
Switch off the alarm (Y page 63).You hear a warning tone. A message appears in the multi-
function display. X
See the explanations for the display message (Y page 259).You hear a warning tone. You are driving with the parking
brake applied. X
Release the parking brake. You hear a warning tone. You did not switch off the lights
when leaving the vehicle. X
Turn the light switch to MorU.
or
X If the rear foglamp is switched on: press the light switch in as far
as it will go. Practical advice
* optional
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Troubleshooting
304 Problem Possible cause/consequence Suggested solutions
The engine cannot 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 does not work:
X Check the starter battery and charge it if necessary
(Y page 334).
or
X Jump-start the vehicle (Y page 339).
or
X Consult a qualified specialist workshop. Practical advice
* optional
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Troubleshooting
306 Problem Possible cause/consequence Suggested solutions
The vehicle cannot be started
using the KEYLESS GO key and
the KEYLESS GO button. The KEY-
LESS GO key is in the vehicle. A door is open. The key can there-
fore not be detected as easily. X
Close the door and try to start the vehicle again. You did not depress the brake
when starting the engine. X
Depress the brake and press the KEYLESS GO button. There is interference from a pow-
erful source of radio waves. X
Start your vehicle using the KEYLESS GO key in the ignition lock. You have lost the KEYLESS GO
key. X
Have the KEYLESS GO key cancelled at a Mercedes-Benz Service
Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. Auxiliary heating/ventilation*
Problem Possible cause/consequence Suggested solutions
The auxiliary heating is not work-
ing. The fuel level is down to the
reserve level. X
Refuel at the nearest filling station. The battery is not sufficiently
charged. X
Charge the battery. The auxiliary heating is faulty. X
Have the auxiliary heating checked at a qualified specialist work-
shop. Practical advice
* optional
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Troubleshooting
307Problem Possible cause/consequence Suggested solutions
The auxiliary heating cannot be
switched on or off using the
remote control. The remote control display shows
FAIL and the
¢symbol.
The signal transmission between
the remote control and the vehi-
cle is faulty. X
Change your position in relation to the vehicle, moving closer if
necessary.
X Make another attempt to switch the auxiliary heating on or off using
the remote control. The remote control display shows
FAIL and the
¡symbol.
There is not enough fuel in the
tank, or the auxiliary heating is
faulty. X
Refuel at the nearest filling station.
X Have the auxiliary heating checked at a qualified specialist work-
shop. Parking up the vehicle
Problem Possible cause/consequence Suggested solutions
The vehicle is to be left parked up
for longer than six weeks. Damage resulting from non-use
may occur if the vehicle is parked
up for long periods. X
Visit a qualified specialist workshop and seek advice.
X Disconnect the battery ( Ypage 335). Practical advice
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Changing the bulbs
312
X
Insert emergency key element 1into the
opening in the key and push in the direction
of the arrow.
Battery tray 2is released.
X Pull battery tray 2out of the key. 1
Batteries
X Remove old batteries 1from the battery
tray.
X Insert the new batteries beneath the con-
tact spring with the positive terminal facing
upwards. Use a lint-free cloth to do so.
X Push the battery tray back into the key
housing until the battery tray engages.
X Check the function of all key buttons on the
vehicle. Auxiliary heating* remote control
One 6V pin battery, type 2CR11108 is
required. 1
Battery
2 Battery cover
X Prise apart the side arms of battery cover
2 and slide off battery cover 2.
X Remove old battery 1.
X Insert the new battery. Observe the polarity
signs on the back of the remote control
when doing so.
X Slide battery cover 2back onto the
remote control.
X Use the remote control to check the vehi-
cle's auxiliary heating functions. Changing the bulbs
Notes on changing bulbs
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that all bulbs function correctly at all times. G
Risk of injury
Bulbs and lamps can be very hot. You
should therefore allow them to cool down
before you change them. Otherwise, you
could be burned if you touch them.
Keep bulbs out of the reach of children.
Otherwise, they could damage them, for
example, and injure themselves.
Never use a bulb which has been dropped.
Such a bulb may explode and injure you.
H7 bulbs are pressurised and could explode
when you change them, particularly if they
are very hot. You should therefore wear eye
protection and gloves when you are chang-
ing them. G
Risk of injury
Xenon bulbs carry a high voltage. You could
get an electric shock and be seriously or
even fatally injured if you touch the electric
contacts on xenon bulbs. Therefore, never
remove the cover from xenon bulbs. Practical advice
* optional
164_AKB; 5; 5, en-GB
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Version: 2.10.6
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