
X
Press the =or; button to select
Interm. Time
Interm. Time.
X Press ato confirm.
The intermediate time is displayed for five
seconds.
Starting a new lap :
RACETIMER
; Fastest lap time (best lap)
= Lap
X Press ato confirm New Lap
New Lap.
i A maximum of 16 laps may be stored. The
16th lap can only be completed with Finish
Finish
Lap
Lap.
Stopping the RACETIMER X
Press the %button on the steering wheel.
X Confirm Yes
Yes with a.
The RACETIMER interrupts timing if you stop the
vehicle and turn the key to position 1in the igni-
tion lock. If you turn the key to position 3and
then press ato confirm Start
Start, timing is
continued.
Resetting the current lap
X Stop the RACETIMER.
X Press =or; to select Reset Lap
Reset Lap.
X Press ato reset the lap time to "0". Deleting all laps If you switch off the engine, the RACETIMER is
reset to "0" after 30 seconds. All laps are
deleted.
You cannot delete individual stored laps. If you
have stopped 16 laps, the current lap does not
have to be reset.
X Reset the current lap.
X Press ato confirm Reset Reset.
Reset Race Timer?
Reset Race Timer? appears in the multi-
function display.
X Press :to select Yes
Yesand confirm with
a.
All laps are deleted.
Overall evaluation :
RACETIMER overall evaluation
; Total time driven
= Average speed
? Distance covered
A Maximum speed
This function is shown if you have stored at least one lap and stopped the RACETIMER.
X Press =or; on the steering wheel to
select the AMG AMGmenu.
X Press the 9button repeatedly until the
overall evaluation is shown. Menus and submenus
251On-board computer and displays Z

Lap evaluation
:
Lap
; Lap time
= Average lap speed
? Lap length
A Top speed during lap
This function is only available if you have stored at least two laps and have stopped the RACE-
TIMER.
X Press the =or; button on the steering
wheel to select the AMG
AMGmenu.
X Press the 9button repeatedly until the lap
evaluation is shown.
Each lap is shown in a separate submenu. The fastest lap is indicated by flashing symbol :.
X Press the 9or: button to select a dif-
ferent lap evaluation. 252
Menus and submenusOn-board computer and displays

Display messages
Introduction
General notes Display messages appear in the multifunction display.
Display messages with graphic symbols are simplified in the Owner's Manual and may differ from
the symbols in the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in this
Owner's Manual.
Certain display messages are accompanied by an audible warning tone or a continuous tone.
When you stop and park the vehicle, please observe the notes on:
R HOLD function (Y page 191)
R Parking (Y page 167)
Hiding display messages X
Press the aor% button on the steering wheel.
The multifunction display fades the display message out.
High-priority display messages are shown by the multifunction display in red. Some high-priority
display messages cannot be hidden.
The multifunction display shows these messages continuously until the causes for the messages
have been remedied.
Message memory The on-board computer saves certain display messages in the
message memory. You can call up
the display messages:
X Press =or; on the steering wheel to select the Serv.
Serv. menu.
If there are display messages, the multifunction display shows 2 messages 2 messages, for example.
X Press the 9or: button to select the entry, e.g. 2 messages
2 messages.
X Press ato confirm.
X Press the 9or: button to scroll through the display messages.
When the ignition is switched off, all display messages are deleted apart from some high-priority
display messages. Once the causes of the high-priority display messages have been rectified, these display messages are deleted as well. Display
messages
253On-board computer and displays Z

Safety systems
Display messages
Possible causes/consequences and
M
MSolutions !÷
currently unavaila‐
currently unavaila‐
ble ble See
SeeOwner's
Owner's Man‐
Man‐
ual
ual ABS (Anti-lock Brake System), BAS (Brake Assist), ESP
®
(Electronic
Stability Program), ESP ®
trailer stabilisation, PRE ‑SAFE®
, the HOLD
function, hill start assist, Crosswind Assist, STEER CONTROL, Active
Lane Keeping Assist and Active Blind Spot Assist are temporarily
unavailable.
Adaptive brake lights, COLLISION PREVENTION ASSIST PLUS, BAS
PLUS with Cross-Traffic Assist, PRE‑SAFE ®
PLUS and PRE‑SAFE ®
Brake may also have failed.
In addition, the ÷,åand! warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
Possible causes:
R self-diagnosis is not yet complete
R 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 affected. 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 Carefully drive on a suitable stretch of road, making slight steering
movements at a speed above 20 km/h.
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 a qualified specialist workshop immediately. !÷
inoperative inoperative See
SeeOwn‐
Own‐
er's Manual
er's Manual ABS, BAS, ESP
®
, ESP ®
trailer stabilisation, PRE ‑SAFE®
, the HOLD
function, hill start assist, Crosswind Assist, STEER CONTROL, Active
Lane Keeping Assist and Active Blind Spot Assist are unavailable due to a malfunction.
Adaptive brake lights, COLLISION PREVENTION ASSIST PLUS, BAS
PLUS with Cross-Traffic Assist, PRE‑SAFE ®
PLUS and PRE‑SAFE ®
Brake may also have failed.
In addition, the J,÷,åand! warning lamps light up in
the instrument cluster.
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. 254
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions The steerability and braking characteristics may be severely affected.
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.
X Consult a qualified specialist workshop immediately. ÷
currently unavaila‐ currently unavaila‐
ble ble
See
SeeOwner's
Owner's Man‐
Man‐
ual
ual ESP
®
, ESP ®
trailer stabilisation, BAS, PRE ‑SAFE®
, the HOLD function,
hill start assist, Crosswind Assist, STEER CONTROL, Active Lane
Keeping Assist and Active Blind Spot Assist are unavailable due to a
malfunction.
Adaptive brake lights, COLLISION PREVENTION ASSIST PLUS, BAS
PLUS with Cross-Traffic Assist, PRE ‑SAFE®
PLUS and PRE ‑SAFE®
Brake may also have failed.
In addition, the ÷andå warning lamps light up in the instru-
ment cluster.
The self-diagnosis function, for example, may not be complete.
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 braking distance may thus increase in an emergency braking sit-
uation.
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 Carefully drive on a suitable stretch of road, making slight steering
movements at a speed above 20 km/h.
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 a qualified specialist workshop immediately. Display
messages
255On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions PRE-SAFE Functions
PRE-SAFE Functions
limited limited
See
SeeOwner's
Owner's
Manual
Manual PRE
‑SAFE ®
PLUS or PRE‑ SAFE®
Brake is unavailable due to a mal-
function. BAS PLUS with Cross-Traffic Assist may also have failed.
X Consult a qualified specialist workshop immediately. Radar
Radar
sensors
sensors dirty
dirty
See Owner's Manual
See Owner's Manual At least one of the following driving systems or driving safety systems
is temporarily restricted or inoperative:
R PRE-SAFE ®
PLUS
R PRE-SAFE ®
Brake
R COLLISION PREVENTION ASSIST PLUS
R DISTRONIC PLUS with Steering Assist and Stop&Go Pilot
R Active Lane Keeping Assist
R Active Blind Spot Assist
If the radar sensor system in front is dirty, Active Blind Spot Assist will not perform a course-correcting brake application.
Possible causes:
R the sensors in the radiator trim and/or in the bumpers are dirty
R the function of the driving system and/or driving safety system is
impaired due to heavy rain or snow
A warning tone also sounds.
Once the causes listed above no longer apply, the display message
goes out. All driving systems and driving safety systems are opera-
tional again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Safeguard the vehicle against rolling away (Y page 167).
X Switch off the engine.
X Clean the sensors (Y page 327) in the following locations:
R in the radiator trim
R in the front bumper
R in the rear bumper, particularly in the middle of the rear bumper
X Restart the engine.
The display message disappears. ü Mercedes-AMG vehicles only:
If this symbol appears in the multifunction display, a seat belt tongue
has been inserted into a rear seat belt buckle.
Further information on the status indicator for the rear seat belts
(Y page 42). Display
messages
261On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Á
Please reduce speed Please reduce speed You cannot change the vehicle level.
Possible causes:
R You are driving too fast for the selected vehicle level.
R You are driving too fast with a trailer or the trailer-coupling socket is
being used, e.g. for a bicycle rack.
X Drive more slowly and then select the desired vehicle level again
(Y page 196).
X Observe the notes on towing a trailer (Y page 227).Á
Compressor is cool‐ Compressor is cool‐
ing ing You have selected a higher vehicle level. The compressor first needs
to cool down because of frequent level changes.
X Drive in a manner appropriate for the current vehicle level.
X Make sure that there is sufficient ground clearance.
X Allow the compressor to cool down.
When the compressor has cooled down, the display message dis-
appears. The vehicle then continues rising to the selected level. Á
Malfunction Malfunction AIRMATIC is faulty.
X Drive as appropriate for the current vehicle level, but do not exceed
80 km/h.
X Make sure that there is sufficient ground clearance.
X Consult a qualified specialist workshop. ACTIVE
ACTIVE
CURVE
CURVESYSTEM
SYSTEM
malfunctioning
malfunctioning The ACTIVE CURVE SYSTEM is faulty. The vehicle's handling charac-
teristics may be affected.
X Do not drive at speeds above 80 km/h.
X Consult a qualified specialist workshop. ACTIVE ACTIVE
CURVE
CURVESYSTEM
SYSTEM
malfunctioning see
malfunctioning see
Owner's Manual Owner's Manual The ACTIVE CURVE SYSTEM is faulty. The vehicle's handling charac-
teristics are severely impaired. A warning tone also sounds.
G WARNING
There is a risk of an accident.
X Drive on carefully.
X Adjust your driving style to the altered handling characteristics.
X Avoid sudden acceleration in tight corners and quick steering move-
ments.
X Do not drive at speeds above 80 km/h.
X Consult a qualified specialist workshop immediately. Ã
Inoperative Inoperative DSR (Downhill Speed Regulation) is deactivated due to a fault.
X Have DSR checked at a qualified specialist workshop. Display
messages
273On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Blind Spot Assist
Blind Spot Assist
currently unavaila‐ currently unavaila‐
ble ble
See
SeeOwner's
Owner's Man‐
Man‐
ual
ual orActive BlindActive Blind
Spot Assist cur‐
Spot Assist cur‐
rently unavailable rently unavailable
See Owner's Manual See Owner's Manual Blind Spot Assist or Active Blind Spot Assist is temporarily inoperative.
Possible causes:
R the radar sensor system is outside the operating temperature range
R the radar sensor system is temporarily inoperative, e.g. due to elec-
tromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation
The yellow 9indicator lamps also light up in the exterior mirrors.
Once the causes listed above no longer apply, the display message
goes out.
Blind Spot Assist or Active Blind Spot Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Safeguard the vehicle against rolling away (Y page 167).
X Restart the engine. Blind Spot Assist Blind Spot Assist
not available when not available when
towing a trailer towing a trailer
See Owner's Man‐ See Owner's Man‐
ual ual
orActive BlindActive Blind
Spot Assist not
Spot Assist not
available when tow‐ available when tow‐
ing a trailer See ing a trailer See
Owner's Manual Owner's Manual Blind Spot Assist or Active Blind Spot Assist is deactivated while tow-
ing a trailer.
You have established the electrical connection between the trailer and
your vehicle.
X Press aon the steering wheel to confirm the display message. Blind Spot Assist Blind Spot Assist
inoperative inoperativeorActive
Active
Blind Spot Assist
Blind Spot Assist
inoperative inoperative Blind Spot Assist or Active Blind Spot Assist is faulty.
The yellow 9indicator lamps also light up in the exterior mirrors.
X Consult a qualified specialist workshop. Park Assist cancel‐
Park Assist cancel‐
led led The driver's door is open.
X Repeat the parking gap measurement and parking process with the
driver's door closed. You inadvertently touched the multifunction steering wheel while
steering intervention was active.
X While steering intervention is active, make sure not to touch the
multifunction steering wheel. The vehicle has started to skid and ESP
®
has intervened.
X Use Active Parking Assist again later (Y page 202).Park Assist inoper‐ Park Assist inoper‐
ative ative PARKTRONIC is malfunctioning or faulty.
X Follow the instructions and helpful hints in the "Problems with
PARKTRONIC" section (Y page 202).
If the multifunction display still shows the display message: X Consult a qualified specialist workshop. Display
messages
275On-board computer and displays Z