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Troubleshooting
28
0 Problem Possible cause/consequence Suggested solutions
v
The yellow ESP ®
warning
lamp flashes while th e
vehicle is in motion. G
Risk of accident
ESP ®
or traction control has
intervened because at least one
wheel has started to spin.
Cruise control* is switched off. X
Only depress the accelerator pedal as far as necessary when pull-
ing away.
X Release the accelerator pedal while you are driving.
X Adapt your driving style to suit the road and weather conditions.
X Do not deactivate ESP ®
.
Exceptions (Y page 68). G
Risk of accident
At least one tyre is spinning and
ETS is deactivated to prevent the
brakes on the drive wheels from
overheating. X
Observe the additional messages in the multi-function display
(Y page 236).
ETS switches back on again as soon as the brakes have cooled down.
The display message disappears and the vwarning lamp goes
out. 3
The red brake system
warning lamp lights up
while you are driving. You
will also hear a warning
tone. You are driving with the parking
brake on. X
Release the parking brake (Y page 116).
The warning lamp goes out and the warning tone ceases. Practical advice
* optional
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Troubleshooting
28
1 Problem Possible cause/consequence Suggested solutions
3
The red brake system
warning lamp lights up
while the engine is run-
ning. You will also hear a
warning tone. G
Risk of accident
There is insufficient brake fluid in
the fluid reservoir. X
Do not continue driving under any circumstances .
X Consult a qualified specialist workshop immediately.
X Observe the additional messages in the multi-function display
(Y page 236).
X Under no circumstances should you top up the brake fluid. This will
not rectify the fault. D
The red coolant warning
lamp lights up while the
engine is running and the
coolant temperature
gauge is at the start of the
scale. The sensor for the coolant tem-
perature gauge is faulty.
The coolant is too hot. The engine
is not being cooled sufficiently
and may be damaged. X
Do not continue driving under any circumstances .
X Consult a qualified specialist workshop. Practical advice
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Page 289 of 377
Troubleshooting
28
6 Warning tone
s Problem Possible cause/consequence Suggested solutions
The anti-theft alarm system* is
suddenly triggered. You have opened the vehicle
using the emergency key element
without deactivating the anti-
theft alarm system* first. Key:
X
Press the Œor the ‹button.
or
X Insert the key into the ignition lock.
The alarm is deactivated.
KEYLESS GO* :
X Grasp the exterior door handle. The KEYLESS GO key* must be
outside the vehicle .
The alarm is deactivated.
or
X Press the KEYLESS GO button* on the dashboard. The KEYLESS
GO key* must be inside the vehicle.
The alarm is deactivated. You hear a warning tone. A message appears in the multi-
function display. X
See the explanations for the display message (Y page 236). You hear a warning tone. You are driving with the parkin
g
brake on. X
Release the parking brake. Practical advice
* optional
204_AKB; 2; 3, en-GB
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6
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Troubleshooting
29
9 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 therefore
cannot be detected so easily. X
Close the door and try to start the vehicle again . You did not depress the brak
e
when starting the engine. X
Depress the brake pedal 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. Parking up the vehicle
Proble
m Possible cause/consequence Suggested solutions
The vehicle is to be left parked up
for longer than six weeks. X
Visit a qualified specialist workshop and seek advice.
X Disconnect the battery (Y page 326). Practical advice
204_AKB; 2; 3, en-GB
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Resetting triggered NECK-PRO head restraints
30
3 Releasing the parking lock manually
(vehicles with automatic transmis-
sion*)
In the event of an electrical fault, it is possible
to release the selector lever lock manually to
move it out of position P, e.g. if you wish to
tow the vehicle away. 1
Selector lever cove r
2 Release butto n
X Depress the parking brake firmly.
X Press selector lever cover 1to the left and
remove it upwards . X
Press release button 2down and simul-
taneously move the selector lever out of
position P.
The selector lever can now be moved freely
until it is returned to position P. Resetting triggered NECK-PRO head
restraints
If the NECK-PRO head restraints are triggered
in an accident, you must reset the hea d
restraints on the driver's and front-passenge r
seats. Otherwise, the additional protection
will not be available in the event of another
rear-end collision. You can recognise when
head restraints have been triggered by the
fact that they have been moved forwards and
can no longer be adjusted.
Mercedes-Benz recommends that you have
NECK-PRO head restraints checked at a quali-
fied specialist workshop, e.g. a Mercedes-
Benz Service Centre, following a rear-end
collision.
i This work requires a lot of strength; if you
have difficulty resetting the head
restraints, have this work carried out at a
qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre. Practical advice
* optional
204_AKB; 2; 3, en-GB
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Changing the bulbs
307
Rear bulbs Bulb Type
7 Third brake lamp LED
8 Side marker
lamp
Rear foglamp W 5
W
P 21 W 9 Turn signal
(rear) PY 21
W
or
LED* 18 a Brake lamp/tail
lamp 2 x P 21
W b Reversing lamp P 21
W
or
W 16 W19
(Estate) c Licence plate
lighting W 5
W Before changing bulbs
R
Use only the bulb types specified here.
R To prevent a short-circuit, switch off the
lights before changing a bulb.
R Only hold bulbs with a clean, lint-free cloth.
R Do not work with wet or greasy fingers.
R If the new bulb still does not light up, con-
sult a qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
R Have the following bulbs changed at a
qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre:
- the additional turn signal lamps in the
exterior mirrors
- the turn signal lamp* (vehicles with ligh t
package*)
- the third brake lamp
- the front foglamps
- the bi-xenon bulb s
- the licence plate lighting
i Due to the location of the front head -
lamps, it is best to have the bulbs changed at a qualified specialist workshop, e.g.
a
Mercedes-Benz Service Centre.
i Have the headlamp setting checked reg-
ularly at a qualified specialist workshop ,
e.g. a Mercedes-Benz Service Centre. Changing the front bulbs
Halogen headlamps (left-hand side, right mirror
image)
1 Bulb holder for turn signal
2 Housing cover for parking lamp
3 Housing cover for parking lamp
4 Housing cover for main-beam headlamp
5 Housing cover for dipped-beam headlamp
18 Vehicles with light package*: always have the LEDs changed at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
19 Only vehicles without LED turn signal lamps are equipped with these bulb type s Practical advice
* optional
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Changing the bulbs
310Bulb holder for turn signal
1
Mark
2 Retainer
X Place bulb holder in the headlamp so that
retainer 2is upright and mark 1is at the
top .
X Turn bulb holder clockwise until it engages. Changing the rear bulbs
Tail lamps Saloon
X
Switch off the lights .
X Open the boot. Saloon
1
Retaining clips
X Remove the side panel.
or
X Open the left-hand* or right-hand stowage
compartment in the boot. X
Press retaining clips 1together and pull
the bulb holder with the bulb out a short
distance.
X Vehicles with LED turn signals: discon-
nect the cables of the LED turn signal from
the connectors of the bulb holder.
X Remove the bulb holder with the bulb. Saloon: bulb holder without LED turn signal (right
-
hand side, left mirror image)
1 Rear foglamp/side marker lamp
2 Side marker lamp
3 Turn signal lamp
4 Parking lamp/brake lamp/tail lamp
5 Brake lamp/tail lamp
6 Reversing lamp Practical advice
* optional
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0
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Changing the bulbs
311
X
Rear foglamp/turn signal/parkin g
lamp/brake lamp/tail lamp/reversing
lamp: press the respective lamp back -
wards and turn it out of the bulb holder in
an anti-clockwise direction.
X Side marker lamp: pull bulb2out of the
bulb holder.
X Rear foglamp/turn signal/parkin g
lamp/brake lamp/tail lamp/reversing
lamp: insert the new bulb in the bulb holder
and turn in a clockwise direction .
X Side marker lamp: insert the new bulb in
the bulb holder and press in.
X Vehicles with LED turn signals: connect
the cables of the LED turn signal to the
connectors of the bulb holder.
X Reinsert the bulb holder and lock in posi-
tion .
X Close the side trim panel.
Estat e
X Switch off the lights .
X Open the luggage compartment. Estate
1
Retaining clips
X Remove the side panel.
X Press retaining clips 1together and pull
the bulb holder with the bulb out a short
distance.
X Vehicles with LED turn signals: discon-
nect the cables of the LED turn signal from
the connectors of the bulb holder.
X Remove the bulb holder with the bulb. Estate: bulb holder without LED turn signal (right
-
hand side, left mirror image)
1 Rear foglamp/side marker lamp
2 Side marker lamp
3 Turn signal lamp
4 Parking lamp/brake lamp/tail lamp
5 Brake lamp/tail lamp
6 Reversing lamp
X Rear foglamp/turn signal lamp/parkin g
lamp/brake lamp/tail lamp: press the
respective lamp backwards and turn it out
of the bulb holder in an anti-clockwise
direction .
X Side marker lamp/reversing lamp:
remove bulb 2/6 from the bulb holder.
X Rear foglamp/turn signal lamp/parkin g
lamp/brake lamp/tail lamp: insert the Practical advice
204_AKB; 2; 3, en-GB
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