Page 303 of 497

Safety systems
Display messages
Possible causes/consequences and
M
MSolutions !÷
currently unavail‐ currently unavail‐
able See Owner's able See Owner's
Manual Manual ABS (Anti-lock Braking System), ESP
®
(Electronic Stability Pro-
gram), BAS (Brake Assist System), the HOLD function, PRE-SAFE ®
,
hill start assist and ESP ®
trailer stabilisation are temporarily
unavailable.
The adaptive brake lights, BAS PLUS with Cross-Traffic Assist,
COLLISION PREVENTION ASSIST PLUS, PRE ‑SAFE®
PLUS and
PRE‑SAFE ®
Brake may also have failed.
In addition, the ÷,åand! warning lamps light up in the
instrumen tcluster.
ATTENTION ASSIST is deactivated.
For example, the on-board voltage may be insufficient.
G WARNING
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
If the display message disappears, the functions mentioned
above are available again.
If the multifunction display still shows the display message: X Drive on carefully.
X Consult aqualified specialist workshop. !÷
inoperative See inoperative See
Owner's Manual Owner's Manual ABS,E
SP®
,B AS ,the HOLD function, PRE-SAFE ®
,h ill start assist
and ESP ®
trailer stabilisation are not available due to amalfunc-
tion.
The adaptive brake lights, BAS PLUS with Cross-Traffic Assist,
COLLISION PREVENTION ASSIST PLUS, PRE ‑SAFE®
PLUS and
PRE‑SAFE ®
Brake may also have failed.
In addition, the J,÷,åand! warning lamps light up
in the instrumen tcluster.
ATTENTION ASSIST is deactivated.
G WARNING 300
Display messagesOn-board computer and displays
Page 335 of 497

Problem
Possible causes/consequences and
M
MSolutions !
The yellowA
BS warning
lamp is lit while the
engine is running. ABS (Anti-lock Braking System) has been deactivated due to a
fault. Therefore, BAS (Brake Assist System), BAS PLUS with Cross-
Traffic Assist, COLLISION PREVENTION ASSIST PLUS, ESP ®
(Elec-
tronic Stability Program), PRE‑ SAFE®
,P RE‑SAFE ®
PLUS,
PRE‑SAFE ®
Brake, the HOLD function, hill start assist, ESP ®
trailer
stabilisation and the adaptive brake lights, for example, are also
deactivated.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Consult aqualified specialist workshop.
If the ABS control unit is faulty, there is also apossibility that other
systems, such as the navigation system or the automatic trans-
mission, will be unavailable. 332
Warning and indicator lampsint
he instrument clusterOn-board computer and displays
Page 336 of 497

Problem
Possible causes/consequences and
M
MSolutions !
The yellowA
BS warning
lamp is lit while the
engine is running. A
warning tone also
sounds. EBD is unavailable due to
amalfunction .Therefore, ABS,B AS,BAS
PLUS with Cross-Traffic Assist, COLLISION PREVENTION ASSIST
PLUS, ESP ®
,P RE-SAFE ®
,P RE-SAFE ®
PLUS, PRE‑SAFE ®
Brake, the
HOLD function, hill start assist, ESP ®
trailer stabilisation and the
adaptive brake lights, for example, are also unavailable.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above. The front and rear wheels could therefore
lock, for example, if you brake hard.
The steerability and braking characteristics may be severely affec-ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Consult aqualified specialist workshop. J
֌!
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 unavailabl edue to afault. Therefore, ABS,B AS,
BAS PLUS with Cross-Traffic Assist ,COLLISION PREVENTION
ASSIST PLUS, EBD,P RE-SAFE®
,P RE-SAFE ®
PLUS, PRE‑SA FE®
Brake, the HOLD function, hill start assist, ESP ®
trailer stabilisa-
tion and the adaptive brake lights, for example, are also unavail-
able.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above. The fronta nd rear wheels could therefore
lock, for example, if you brake hard.
The steerability and braking characteristics may be severely affec- ted. The braking distanc emay increase in an emergenc ybraking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Consult aqualified specialist workshop. Warning and indicator lampsint
he instrument cluster
333On-board computer and displays Z
Page 338 of 497

Problem
Possible causes/consequences and
M
MSolutions ֌
The yellow ESP
®
and
ESP ®
OFF warning
lamps are lit while the
engine is running. ESP
®
,B AS ,BAS PLUS with Cross-Traffic Assist ,COLLISION PRE-
VENTION ASSIST PLUS, PRE-SAFE ®
,P RE-SAFE ®
PLUS,
PRE‑SA FE®
Brake, the HOLD function, hill start assist, ESP ®
trailer
stabilisation and the adaptive brake lights are unavailabl edue to a
malfunction.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above.
The braking distanc emay thus increase in an emergenc ybraking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Consult aqualified specialist workshop. 6
The red restraint sys-
tem warning lamp is lit
while the engine is run-
ning.
The restraint system is faulty.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident ,may not be triggered.
This poses an increased risk of injury.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Have the restraint system checked immediately at aqualified
specialist workshop.
Observe the additional information on the restraint system
(Y page 44). Warning and indicator lampsint
he instrument cluster
335On-board computer and displays Z