Page 289 of 373

Problem
Possible causes/consequences and
X XSolutions h
The yellow tyre
pressure moni-
tor* warning
lamp is on. G
Risk of accident
The tyre pressure monitor* has detected a sudden or significant
pressure loss in at least one of the tyres.
X Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to traffic conditions as you do so.
X Observe the additional messages in the multi-function display
(Y page 251). 7
The red seat belt
warning lamp
lights up for six
seconds after
the engine is
started 43
. The seat belt warning lamp reminds the driver and front passenger
to fasten their seat belts.
X
Fasten your seat belt (Y page 89).7
After the engine
starts, a warning
tone sounds for
up to six sec-
onds43
. G
Risk of injury
The driver's seat belt is not fastened.
X Fasten your seat belt (Y page 89).
The warning tone ceases. 7
The red seat belt
warning lamp
lights up after
the engine
starts, as soon
as the driver's
door or the
front-passenger
door is closed. G
Risk of injury
The driver or front passenger has not fastened their seat belt.
X Fasten your seat belt (Y page 89).
The warning lamp goes out. G
Risk of injury
There are objects on the front-passenger seat.
X Remove the objects from the front-passenger seat and stow
them safely.
The warning lamp goes out. 43
Only for certain countries. 286
TroubleshootingPractical advice
* optional
212_AKB; 2; 4, en-GB
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        Page 300 of 373

Problem
Possible causes/consequences and
X
X Solutions You have lost a key.
X
Have the 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. You have lost the emer-
gency key element.
X
Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. 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 inte-
rior 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 319).
or
X Jump-start the vehicle (Y page 323).
or
X Consult a qualified specialist workshop. The engine cannot be
started using the key.
The steering lock is mechanically blocked.
44
X Remove the key and reinsert it into the ignition lock. While doing
this, turn the steering wheel in both directions. The engine cannot be
started using KEYLESS
GO*. The key is in the
vehicle. A door is open. Therefore, the key cannot be detected as easily.
X
Close the door and try to start the vehicle again. There is interference from a powerful source of radio waves.
X
Start your vehicle using the key in the ignition lock. 44
Not vehicles with DIRECT SELECT selector lever. Troubleshooting
297Practical advice
* optional
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        Page 327 of 373

X
Slide cover :of positive terminal ;in
the direction of the arrow .
X Connect positive terminal ;on your vehi-
cle to positive terminal =of donor battery
B using the jump lead, beginning with your
own battery.
X Start the engine of the donor vehicle and
run it at idling speed.
X Connect negative terminal ?of donor bat-
tery Bto earth point Aof your vehicle
using the jump lead, Connect donor bat-
tery Bfirst.
X Start the engine.
X First, remove the jump lead from earth
point Aand negative terminal ?, then
from positive terminal ;and positive ter-
minal =, each time disconnecting from the
battery on your own vehicle first.
X Have the battery checked at a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. Towing and tow-starting
Points to remember
G
Risk of accident
If you have the vehicle towed, you must use a
rigid towing bar if:
R the engine is not running.
R there is a brake system malfunction.
R there is a malfunction in the power supply
or the vehicle's electrical system.
The power steering and the brake force boos-
ter do not work when the engine is not run-
ning. Greater braking force will then be
required and brake pedal travel will be longer.
If necessary, depress the brake pedal with full
force.
Before towing away, make sure that the steer-
ing can be moved and is not locked.
If you tow or tow-start another vehicle, its
weight must not exceed the maximum per-
missible gross vehicle weight of your vehicle. G
Risk of accident
The vehicle is braked when the HOLD function
or Distronic Plus* is activated. Therefore, 324
Towing and tow-startingPractical advice
* optional
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        Page 330 of 373

Removing the towing eye
X Take the wheel wrench from the vehicle
tool kit (Y page 249).
X Insert the wheel wrench handle into the
towing eye and turn it anti-clockwise.
X Unscrew the towing eye.
X Replace the cover and press it until it
engages.
X Return the towing eye and the wheel
wrench to the vehicle tool kit. Transporting the vehicle
The towing eyes or trailer coupling* can be
used to pull the vehicle onto a trailer or trans-
porter if you wish to transport it.
! Only secure the vehicle by the wheels or
wheel rims, not by parts of the vehicle such
as axle or steering components. Otherwise,
the vehicle could be damaged.
Vehicles with manual transmission X
Shift to neutral.
Vehicles with automatic transmission* X
Turn the key to position 2(Y page 75) in
the ignition lock.
X Move the transmission to position N.Fuses
Notes on changing fuses
The fuses in your vehicle serve to close down
faulty circuits. If a fuse blows, all the compo-
nents on the circuit and their functions will
fail.
Blown fuses must be replaced with fuses of
the same rating, which you can recognise by
the colour and value. The fuse ratings are lis-
ted in the fuse allocation chart. A Mercedes- Benz Service Centre will be happy to advise
you. G
Risk of fire
Only use fuses that have been approved for
Mercedes-Benz vehicles and which have the
required fuse rating for the systems con-
cerned. Do not attempt to repair or bridge
faulty fuses. A circuit overload could other-
wise cause a fire. Have the cause traced and
rectified at a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre.
If the newly inserted fuse also blows, have the
cause traced and rectified at a qualified spe-
cialist workshop, e.g. a Mercedes-Benz
Service Centre.
! Only use fuses that have been approved
for Mercedes-Benz vehicles and which
have the correct fuse rating for the system
concerned. Otherwise, components or sys-
tems could be damaged.
The fuses are located in various fuse boxes:
R fuse box in the engine compartment on the
driver's side
R fuse box in the boot/luggage compartment
on the right-hand side of the vehicle
Fuse allocation chart The fuse allocation chart is located with the
vehicle tool kit (Y
page 249) in the stowage
compartment under the boot/luggage com-
partment floor. Before changing a fuse
X Park the vehicle.
X Switch off all electrical consumers.
X Remove the key from the ignition lock. Fuse box in the engine compartment
X Make sure that the windscreen wipers are
turned off. Fuses
327Practical advice
* optional
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