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Display messages
Possible causes/consequences and
X
X Solutions Blind
Spot
Assist currently
unavaila‐
ble See
Owner's
Manual
Blind Spot Assist* is temporarily inoperative if:
R
you have established the electrical connection between a
trailer and your vehicle.
R the sensors in the bumpers are dirty.
R its function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating tempera-
ture range.
R the radar sensor system has switched off automatically, for
example in the vicinity of a radio telescope facility.
X When towing a trailer, confirm the display message with
a.
When driving without a trailer:
Blind Spot Assist* is operational again and the display mes-
sage disappears when:
R the dirt (e.g. slush) drops away while you are driving.
R the system detects that the sensors are fully available
again.
R the radar sensor system is back within the operating tem-
perature range.
If the display message continues to be shown:
X Clean the bumpers (Y page 243).
X Restart the engine. Cruise
control
and SPEED‐
TRONIC inopera‐
tive Cruise control and Speedtronic are malfunctioning. A warning
tone also sounds.
X
Visit a qualified specialist workshop. Cruise
control - - - km/h A condition for activating cruise control has not been fulfilled.
You have tried to store a speed below 30 km/h, for example.
X
Activate ESP ®
(Y page 61)
X If conditions permit, drive faster than 30 km/h and store
the speed (Y page 138). 262
Display
messagesPractical advice
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Page 266 of 373

Symbol messages
G
Risk of accident and injury
The operating safety of the vehicle can be compromised if maintenance work is carried out
incorrectly. This could cause you to lose control of the vehicle and cause an accident. The safety
systems may also not be able to protect you or others as they are designed to do.
Always have maintenance work carried out at a qualified specialist workshop. The qualified spe-
cialist workshop must have the necessary specialist knowledge and tools to carry out the work
required. Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this
purpose. In particular, work relevant to safety or on safety-related systems must be carried out
at a qualified specialist workshop. Display messages
Possible causes/consequences and
X
X Solutions 7 If the symbol appears in the multi-function display, a seat belt
tongue has been clipped into a rear seat belt buckle.
Further information on the status indicator for the rear seat
belts (Y
page 91) a G
Risk of injury
If the symbol appears in the multi-function display, a seat belt
tongue has not been clipped into a rear seat belt buckle.
X If necessary, ask occupants in the rear to fasten their seat
belts.
Further information on the status indicator for the rear seat
belts (Y page 91) N Saloon: the boot lid is open.
X
Close the boot lid. A Estate: the tailgate is open.
X
Close the tailgate. M
or
? G
Risk of accident
The bonnet is open. A warning tone also sounds.
X Stop immediately, paying attention to road and traffic con-
ditions.
X Close the bonnet.
If the active bonnet (pedestrian protection) is triggered:
X Reset the bonnet (Y page 302).
X Close the bonnet. ; At least one door is open. A warning tone also sounds.
X
Close the doors. Display messages
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Page 267 of 373

Display messages
Possible causes/consequences and
X
X Solutions J ABS and
ESP cur‐
rently
unavaila‐
ble See
Owner's
Manual G
Risk of accident
ABS (Anti-lock Braking System), ESP ®
(Electronic Stability
Program), BAS (Brake Assist), PRE-SAFE ®
, the HOLD function,
hill start assist and ESP ®
trailer stabilisation are temporarily
unavailable. The on-board voltage may, for example, be insuf-
ficient. BAS PLUS* (Brake Assist PLUS) and PRE-SAFE ®
Brake* may be inoperative as well. In addition, the ä,
å and! warning lamps light up in the instrument clus-
ter.
The brake system continues to function normally, but without
the functions listed above. ATTENTION ASSIST is deactivated.
X Drive on carefully.
X Visit a qualified specialist workshop. J ABS and
ESP inop‐
erative
See Own‐
er's Man‐
ual
G
Risk of accident
ABS, ESP ®
, BAS, PRE-SAFE ®
, the HOLD function, hill start
assist and ESP ®
trailer stabilisation are unavailable due to a
malfunction. BAS PLUS* and PRE-SAFE ®
Brake* may also
have failed. In addition, the ä,åand! warning
lamps light up in the instrument cluster.
The brake system continues to function normally, but without
the functions listed above. ATTENTION ASSIST is deactivated.
X Drive on carefully.
X Visit a qualified specialist workshop. ÷ ESP inop‐
erative
See Own‐
er's Man‐
ual
G
Risk of accident
ESP ®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist
and ESP ®
trailer stabilisation are unavailable due to a mal-
function. BAS PLUS* and PRE-SAFE ®
Brake* may also have
failed. In addition, the äandå warning lamps light up
in the instrument cluster.
The brake system continues to function normally, but without
the functions listed above. ATTENTION ASSIST is deactivated.
X Drive on carefully.
X Visit a qualified specialist workshop. 264
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messagesPractical advice
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Page 268 of 373

Display messages
Possible causes/consequences and
X
X Solutions j Check
trailer
hitch lock
G
Risk of accident
The trailer tow hitch* is not correctly engaged. A warning tone
also sounds.
X Pull over and stop the vehicle safely, paying attention to
road and traffic conditions.
X Engage the ball coupling in the end position (Y page 234).À Attention
Assist:
Time for
a break? Based on specific criteria, ATTENTION ASSIST has deter-
mined that your concentration has waned. A warning tone
also sounds.
X
If necessary, take a break.
During long journeys, take regular breaks in good time so you
get enough rest. À Attention
Assist
inopera‐
tive ATTENTION ASSIST is inoperative.
X
Visit a qualified specialist workshop. # The battery is not being charged. A warning tone also sounds.
Possible causes are:
R
a faulty alternator
R a torn poly-V-belt
R a malfunction in the electronics
X Pull over and stop the vehicle safely, paying attention to
road and traffic conditions and leave the engine running.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise over-
heat.
X Switch off the engine.
X Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X Visit a qualified specialist workshop. # Check
brake wear The brake pads/linings have reached their wear limit.
X
Visit a qualified specialist workshop. Display
messages
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Display messages
Possible causes/consequences and
X
X Solutions J Check
brake
fluid
level
G
Risk of accident
There is insufficient brake fluid in the brake fluid reservoir. In
addition, the Jwarning lamp in the instrument cluster
lights up and a warning tone sounds.
X Pull over and stop the vehicle safely as soon as possible,
paying attention to road and traffic conditions. Do not con-
tinue driving under any circumstances.
X Consult a qualified specialist workshop.
Do not top up the brake fluid. This will not rectify the fault. J Release
parking
brake You are driving with the parking brake applied. A warning tone
also sounds.
X
Release the parking brake. J EBD, ABS
and ESP
inopera‐
tive See
Owner's
Manual
G
Risk of accident
EBV (electronic brake force distribution), ABS, ESP ®
, BAS,
PRE-SAFE ®
, the HOLD function, hill start assist and ESP ®
trailer stabilisation are unavailable due to a malfunction. In
addition, the ä,åand! warning lamps in the
instrument cluster light up and a warning tone sounds.
The brake system continues to function normally, but without
the functions listed above. ATTENTION ASSIST is deactivated.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 266
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messagesPractical advice
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Display messages
Possible causes/consequences and
X
X Solutions J Brake
immedi‐
ately A malfunction has occurred while the HOLD function or Dis-
tronic Plus* is active.
or
Vehicles with manual transmission: with the HOLD function
activated, you have either:
R
opened the driver's door and released the seat belt or
R switched off the engine or
R opened the bonnet
A tone may also sound at regular intervals. The tone becomes
louder if you attempt to lock the vehicle.
You cannot start the engine.
X Paying attention to the traffic situation, immediately
depress the brake pedal firmly and hold until the display
message disappears.
X Prevent the vehicle from rolling away before you leave it
(Y page 107).
You can restart the engine. ? Coolant
Stop vehi‐
cle
Switch
engine off The coolant is too hot. In addition, the
?warning lamp in
the instrument cluster lights up and a warning tone sounds.
X Pull over and stop the vehicle safely and switch off the
engine, paying attention to road and traffic conditions.
X Make sure that the air supply to the radiator is not blocked,
e.g. by slush.
X Wait until the display message disappears before restarting
the engine. Otherwise, there is a risk of engine damage.
X Observe the coolant temperature gauge.
X If the coolant temperature increases again, visit a qualified
specialist workshop immediately. The poly-V-belt may have torn. A warning tone also sounds.
X
Pull over and stop the vehicle safely and switch off the
engine, paying attention to road and traffic conditions.
X Check the poly-V-belt.
X If the poly-V-belt is not damaged: do not start the engine
again until the display message goes out. Otherwise, there
is a risk of engine damage.
X If the poly-V-belt is torn: do not continue driving. Consult
a qualified specialist workshop. Display
messages
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Display messages
Possible causes/consequences and
X
X Solutions ? The engine fan is faulty.
X
If the coolant temperature is less than 120 †, you can
continue driving to the nearest qualified specialist work-
shop.
X Avoid subjecting the engine to heavy loads (e.g. driving in
mountainous terrain) and stop-and-go driving. + Top up
coolant
See Own‐
er's Man‐
ual The coolant level is too low.
X
Top up the coolant, observing the warning notes before
doing so (Y page 221).
X Have the engine cooling system checked at a qualified spe-
cialist workshop if the coolant needs topping up more often
than usual. ¨ Vehicle
rising
Vehicles with AIRMATIC*: your vehicle is adjusting to the level
you have selected.
¨ Vehicle
rising
Please
wait
Vehicles with AIRMATIC*: the vehicle level is too low when
stationary. A warning tone also sounds.
X
Remain stationary.
X Wait until the display message disappears.
The vehicle has reached the level required for driving. ¨ STOP vehi‐
cle Vehi‐
cle too
low
G
Risk of accident
AIRMATIC* is faulty. A warning tone also sounds.
X Do not exceed a maximum speed of 80 km/h.
X Make only slight steering movements. Otherwise, the front
wing or the tyres could be damaged when you drive on.
X Listen for scraping sounds.
X Pull over and stop the vehicle, paying attention to road and
traffic conditions, and select a higher vehicle level.
The vehicle may be raised, depending on the type of mal-
function.
X Visit a qualified specialist workshop. ¨ Malfunc‐
tion
G
Risk of accident
The AIRMATIC* function is restricted. The vehicle's handling
characteristics may be affected.
X Do not exceed a maximum speed of 80 km/h.
X Visit a qualified specialist workshop. 268
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Display messages
Possible causes/consequences and
X
X Solutions ! Clean the
fuel fil‐
ter There is water in the fuel filter. The water must be drained
off
41
.
X Visit a qualified specialist workshop. ¯ Refill
AdBlue at
workshop
See Own‐
er's Man‐
ual
The AdBlue
®
level has fallen below the reserve range. A warn-
ing tone also sounds.
X Have the AdBlue ®
reservoir filled as soon as possible at a
qualified specialist workshop. ¯ Refill
AdBlue at
workshop
No start
in ..km
The AdBlue
®
level is only sufficient for the indicated route. A
warning tone also sounds.
X Have the AdBlue ®
reservoir filled as soon as possible at a
qualified specialist workshop. ¯ Refill
AdBlue at
workshop
Eng.
start not
possible
The AdBlue
®
tank is empty. A warning tone also sounds. You
can no longer start the engine.
X Consult a qualified specialist workshop immediately. ¯ Check
AdBlue
See Own‐
er's Man‐
ual
The AdBlue
®
system is malfunctioning. A warning tone also
sounds.
X Visit a qualified specialist workshop. ¯ AdBlue
No start
in ..km
The AdBlue
®
system is malfunctioning. A warning tone also
sounds.
X Visit a qualified specialist workshop immediately. ¯ AdBlue
Eng.
start not
possible
The AdBlue
®
system is malfunctioning. A warning tone also
sounds. You can no longer start the engine.
X Consult a qualified specialist workshop immediately. 41
Only for certain countries. Display
messages
269Practical advice
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