2015 MERCEDES-BENZ GLK-CLASS SUV Owners Manual

ProblemPossible causes/consequences and M Solutions
!
The yellow ABS warning
lamp is lit while the
engine is running.ABS is temporarily unavailable. BAS, BAS PLUS, ESP ®
, EBD (elec-
tronic brake force distribution), PRE

ProblemPossible causes/consequences and M Solutions
!
The yellow ABS warning
lamp is lit while the
engine is running. A
warning tone also
sounds.EBD is not available due to a malfunction. Therefore, BAS, BAS
PLUS, ESP®
, PRE-SAFE ®
, PRE-SAFE ®
Brake, the HOLD function,
hill start assist and ESP ®
trailer stabilization are also unavailable,
for example.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but wi thout the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be sever ely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit a qualified specialist workshop.
$ (USA only)
J (Canada only)
÷ å !
The red brake warning
lamp, the yellow ESP ®
and ESP ®
OFF warning
lamps and the yellow
ABS warning lamp are
lit while the engine is
running.ABS and ESP ®
are not available due to a malfunction. Therefore,
BAS, BAS PLUS, EBD, PRE-SAFE ®
, PRE-SAFE ®
Brake, the HOLD
function, hill start assist and ESP ®
trailer stabilization are also
unavailable, for example.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but wi thout the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be sever ely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit a qualified specialist workshop.
264Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences and M Solutions
֊
The yellow ESP®
warn-
ing lamp flashes while
the vehicle is in motion.ESP ®
or traction control has intervened because there is a r isk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
X When pulling away, only depress the accelerator pedal a s far as
necessary.
X Ease off the accelerator pedal while the vehicle is in motion.
X Adapt your driving style to suit the road and weather c onditions.
X Do not deactivate ESP ®
.
In rare cases ( Y page 71) , it may be best to deactivate ESP ®
.
Observe the important safety notes on ESP ®
(Y page 71).
å
The yellow ESP ®
OFF
warning lamp is lit while the engine is running.ESP ®
is deactivated.
GWARNING
If ESP ®
is switched off, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Reactivate ESP ®
.
In rare cases ( Y page 71) , it may be best to deactivate ESP ®
.
Observe the important safety notes on ESP ®
(Y page 71).
X Adapt your driving style to suit the road and weather c onditions.
If ESP ®
cannot be activated:
X Drive on carefully.
X Have ESP ®
checked at a qualified specialist workshop.
÷ä å
The yellow ESP ®
and
ESP ®
OFF warning
lamps are lit while the
engine is running.ESP ®
, BAS, BAS PLUS, PRE

ProblemPossible causes/consequences and M Solutions
÷ å
The yellow ESP ®
and
ESP ®
OFF warning
lamps are lit while the
engine is running.ESP ®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist and
ESP ®
trailer stabilization are temporarily unavailable.
BAS PLUS and PRE

Engine
ProblemPossible causes/consequences and M Solutions
;
The yellow Check
Engine warning lamp
lights up while the
engine is running.There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system
R in the fuel system
The emission limit values may be exceeded and the engine may be
in emergency mode.
X Have the vehicle checked as soon as possible at a qualified
specialist workshop.
iIn some states, you must immediately visit a qualified sp ecial-
ist workshop as soon as the yellow Check Engine warning lam p
lights up. This is due to the legal requirements in effect in these
states. If in doubt, check whether such legal regulations a pply in
the state in which you are currently driving.
8
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion. In addition,
the ; Check Engine
warning lamp may light
up.The fuel system pressure is too low. The fuel filler cap i s not closed
correctly or the fuel system is leaking.
X Observe the additional display messages in the multifunction
display.
X Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed: close the fuel filler
cap.
X If the fuel filler cap is closed: visit a qualified specialist work-
shop.
8
The yellow reserve fuel
warning lamp lights up
while the engine is run-
ning.The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station.
Warning and indicator lamps in the instrument cluster267
On-board computer and displays
Z

ProblemPossible causes/consequences and M Solutions
?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the start of the scale.The temperature sensor for the coolant temperature gauge is
defective.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
X Secure the vehicle against rolling away ( Y page 168).
X Consult a qualified specialist workshop.
268Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences and M Solutions
?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning.The coolant level is too low.
If the coolant level is correct, the airflow to the eng ine radiator may
be blocked or the electric engine radiator fan may be malfunc-
tioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 168).
X Wait until the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Check the coolant level and add coolant ( Y page 303). Observe
the warning notes.
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. drivin g in moun-
tainous terrain, and stop-and-go traffic.
?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning. A warning tone
also sounds.The coolant temperature has exceeded 248 ‡ (120 †). The air-
flow to the engine radiator may be blocked or the coo lant level may
be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can ca use some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury. X Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 168).
X Wait until the engine has cooled down.
Warning and indicator lamps in the instrument cluster269
On-board computer and displays
Z

ProblemPossible causes/consequences and M Solutions
X
Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Check the coolant level and add coolant ( Y page 303). Observe
the warning notes.
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. drivin g in moun-
tainous terrain, and stop-and-go traffic.
Driving systems
ProblemPossible causes/consequences and M Solutions
·
The red distance warn-
ing lamp lights up while
the vehicle is in motion. A warning tone also
sounds.GWARNING
You are approaching a vehicle or a stationary obstacle in your line
of travel at too high a speed.
There is a risk of an accident.
X Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
More information about DISTRONIC PLUS ( Y page 176) and
PRE