engine MERCEDES-BENZ CLS 2018 Repair Manual
[x] Cancel search | Manufacturer: MERCEDES-BENZ, Model Year: 2018, Model line: CLS, Model: MERCEDES-BENZ CLS 2018Pages: 334, PDF Size: 7.87 MB
Page 148 of 334
Have the brake system checked immediately.
Consult a qualified specialist workshop to
arrange this.
! Vehicles with 4MATIC: function or per-
formance tests may only be carried out on a 2-
axle dynamometer. If you wish to operate the
vehicle on such a dynamometer, please con-
sult a qualified specialist workshop in
advance. You could otherwise damage the
drive train or the brake system.
! Vehicles with 4MATIC: as the ESP ®
sys-
tem operates automatically, the engine and
the ignition must be switched off (SmartKey in
position 0 or 1 in the ignition lock or Start/
Stop button in position 0 or 1 ) while the park-
ing brake is being tested on a brake dyna-
mometer.
Braking maneuvers triggered automatically
by ESP ®
may seriously damage the brake sys-
tem.
! Vehicles with 4MATIC: as the ESP ®
sys-
tem operates automatically, the engine and
the ignition system must be switched off
(SmartKey in position 0 or 1 in the ignition
lock or Start/Stop button in position 0 or 1 )
when: R
testing the parking brake on a brake dyna-
mometer. R
you intend to have the vehicle towed with
one of the axles raised.
Braking maneuvers triggered automatically
by ESP ®
may seriously damage the brake sys-
tem.
All checks and maintenance work on the brake
system must be carried out at a qualified spe-
cialist workshop.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the functional-
ity of your brakes at regular intervals. To do so,
press firmly on the brake pedal when driving at a
high speed. This improves the grip of the brake
pads.
You can find a description of Brake Assist (BAS)
on ( Y
page 65) or of BAS PLUS on ( Y
page 65). The braking characteristics of the vehicle can be
seriously impaired if: R
brake pads other than those recommended
are installed R
the recommended brake fluid is not used
Safe braking can no longer be guaranteed.
AMG high-performance and ceramic
brakes The high-performance brake system is only
installed on the Mercedes-AMG
CLS 63 S 4MATIC model.
The AMG brake systems are designed for heavy
loads. This may lead to noise when braking. This
will depend on: R
Speed R
Braking force R
Environmental conditions, such as tempera-
ture and humidity
The wear of individual components of the brake
system, such as the brake pads/linings or brake
discs, depends on the individual driving style
and operating conditions.
For this reason, it is impossible to state a mile-
age that will be valid under all circumstances. An
aggressive driving style will lead to high wear.
You can obtain further information about this
from your authorized Mercedes-Benz Center.
New and replaced brake pads and discs only
reach their optimum braking effect after several
hundred kilometers of driving. Compensate for
this by applying greater force to the brake pedal.
Keep this in mind, and adapt your driving and
braking accordingly during this break-in period.
Excessive heavy braking results in correspond-
ingly high brake wear. Observe the brake wear
warning lamp in the instrument cluster and note
any brake status messages in the multifunction
display. Especially for high performance driving,
it is important to maintain and have the brake
system checked regularly.146
Driving tips
Driving and parking
Page 149 of 334
Drivin g on wet road s
Hydroplaning If water has accumulated to a certain dept h on
th e road surface, there is a danger of hydro-
planin g occurring, eve n if:R
you drive at low speeds .R
th e tires hav e adequat e tread depth.
Fo r this reason , in th e event of heav y rain or in
condition s in whic h hydroplaning may occur ,
you mus t drive in th e followin g manner:R
lowe r your speed.R
avoid ruts. R
avoid sudden steerin g movements .R
brake carefully.
Drivin g on flooded road s
! Do no t drive through floode d areas. Chec k
th e dept h of any water befor e drivin g through
it . Drive slowly through standin g water. Oth-
erwise , water may ente r th e vehicle interio r or
th e engin e compartment. Thi s can damage
th e electronic component s in th e engin e or
th e automatic transmission. Water can also
be drawn in by th e engine's air suction nozzles
and this can cause engin e damage.
Winte r drivin g
G WARNING
If you shift down on a slipper y road surfac e in
an attempt to increase th e engine's braking
effect , th e drive wheels could los e their grip.
There is an increase d danger of skidding and
accidents .
Do no t shift down fo r additional engin e brak-
in g on a slipper y road surface.
G DANGER
If th e exhaus t pipe is blocke d or adequat e
ventilation is no t possible, poisonous gases
suc h as carbon monoxide (CO) may ente r th e
vehicle. Thi s is th e case, e.g. if th e vehicle
becomes trappe d in snow. There is a ris k of
fatal injury. If you leav e th e engin e or th e auxiliar y heatin g
running , mak e sur e th e exhaus t pipe and are a
around th e vehicle are clear of snow. To
ensur e an adequat e supply of fresh air, ope n a
window on th e sid e of th e vehicle that is no t
facin g into th e wind.
Hav e your vehicle winter-proofed at a qualified
specialis t workshop at th e onset of winter.
Drive particularly carefully on slipper y road sur -
faces. Avoid sudden acceleration , steerin g and
braking maneuvers . Do no t use th e cruise con-
trol or DISTRONIC PLUS.
If th e vehicle threatens to skid or canno t be
stopped when movin g at low speed:X
Shift th e transmissio n to position N .
The outsid e temperature indicator is no t
designed to serve as an ice-warnin g devic e and
is therefore unsuitable fo r that purpose.
Changes in th e outsid e temperature are dis -
playe d after a short delay.
Indicated temperature s just abov e th e freezin g
poin t do no t guarantee that th e road surfac e is
free of ice. The road may still be icy, especially in
wooded areas or on bridges. The vehicle could
skid if you fail to adapt your drivin g style. Always
adapt your drivin g style and drive at a speed to
suit th e prevailin g w eather conditions.
You should pay special attention to road condi-
tion s when temperature s are around freezin g
point.
Fo r more information on drivin g wit h snow
chains, see ( Y
page 294).
Fo r more information on drivin g wit h summer
tires , see ( Y
page 294).
Observ e th e note s in th e "Winte r operation " sec -
tion ( Y
page 294).
Drivin g systems
Mercedes-Benz Intelligent Drive
Mercedes-Ben z Intelligen t Drive stand s fo r inno -
vative driver assistanc e and safet y systems
whic h enhance comfor t and suppor t th e driver in
critical situations. Wit h these intelligen t co-ordi -
nated systems Mercedes-Ben z has set a mile-
ston e on th e pat h toward s autonomous driving.
Mercedes-Ben z Intelligen t Drive embraces all
elements of active and passive safet y in on e wellDriving systems 14 7
Driving an d parking Z
Page 150 of 334
thought out system – for the safety of the vehi-
cle occupants and that of other road users.
Further information on driving safety systems
( Y
page 64).
Cruise control
General notes Cruise control maintains a constant road speed
for you. It brakes automatically in order to avoid
exceeding the set speed. On long and steep
downhill gradients, especially if the vehicle is
laden, you must shift to a lower gear in time. By
doing so, you will make use of the braking effect
of the engine. This relieves the load on the brake
system and prevents the brakes from overheat-
ing and wearing too quickly.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a steady
speed for a prolonged period. You can store any
road speed above 20 mph (30 km/h).
Important safety notes If you fail to adapt your driving style, cruise con-
trol can neither reduce the risk of an accident
nor override the laws of physics. Cruise control
cannot take into account the road, traffic and
weather conditions. Cruise control is only an
aid. You are responsible for maintaining a safe
distance to the vehicle in front, for vehicle
speed, for braking in good time and for staying in
lane.
Do not use cruise control: R
in road and traffic conditions which do not
allow you to maintain a constant speed, e.g. in
heavy traffic or on winding roads R
on slippery road surfaces. Braking or accel-
erating could cause the drive wheels to lose
traction and the vehicle could then skid R
when there is poor visibility, e.g. due to fog,
heavy rain or snow
If there is a change of drivers, advise the new
driver of the speed stored.
i The speed indicated in the speedometer
may differ slightly from the speed stored. Cruise control lever
C
Activates or increases speed D
Activates or reduces speed
Page 155 of 334
between your vehicle and the vehicle in front
becomes too small.
i When you change lanes, DISTRONIC PLUS
monitors the left lane on left-hand-drive vehi-
cles or the right lane on right-hand-drive vehi-
cles.
Stopping
G WARNING
When leaving the vehicle, even if it is braked
only by DISTRONIC PLUS, it could roll away if: R
there is a malfunction in the system or in
the voltage supply. R
DISTRONIC PLUS has been deactivated
with the cruise control lever, e.g. by a vehi-
cle occupant or from outside the vehicle. R
the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with. R
the battery is disconnected. R
the accelerator pedal has been depressed,
e.g. by a vehicle occupant.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
DISTRONIC PLUS and secure the vehicle
against rolling away.
For further information on deactivating
DISTRONIC PLUS ( Y
page 155).
If DISTRONIC PLUS detects that the vehicle in
front has stopped, it will cause your vehicle to
brake and come to a halt.
Once your vehicle is stationary, it remains sta-
tionary and you do not need to depress the
brake.
Depending on the specified minimum distance,
your vehicle will come to a standstill at a suffi-
cient distance behind the vehicle in front. The
specified minimum distance is set using the
control on the cruise control lever.
When DISTRONIC PLUS is activated, the trans-
mission is shifted automatically to position P if:R
the driver's door is open and the driver's seat
belt is unfastened. R
the engine is switched off, unless it is auto-
matically switched off by the ECO start/stop
function. R
a system malfunction occurs. R
the power supply is not sufficient.
Setting a speed X
Press the cruise control lever up C for a
higher speed or down D for a lower speed.X
To adjust the set speed in 1 mph incre-
ments (1 km/h increments): briefly move
the cruise control lever up C or down D to
the pressure point.
Every time the cruise control lever is pressed
up C or down D , the last speed stored is
increased or reduced. X
To adjust the set speed in 5 mph incre-
ments (1 0 km/h increments): briefly move
the cruise control lever up C or down D
beyond the pressure point.
Every time the cruise control lever is pressed
up C or down D , the last speed stored is
increased or reduced.
i If you accelerate to overtake, DISTRONIC
PLUS adjusts the vehicle's speed to the last
speed stored after you have finished overtak-
ing.
Setting a specified minimum distance You can set the specified minimum distance for
DISTRONIC PLUS by varying the time span
between one and two seconds. With this func-
tion, you can set the minimum distance that
DISTRONIC PLUS keeps to the vehicle in front,
dependent on vehicle speed. You can see this
distance in the multifunction display
( Y
page 154).
i Make sure that you maintain a sufficient
distance to the vehicle in front and comply
with the minimum distance as required by
law. Adjust the distance to the vehicle in front
if necessary.Driving systems 153
Driving and parking Z
Page 157 of 334
Deactivating DISTRONI C PLUS
There are severa l ways to deactivat e
DISTRONIC PLUS: X
Briefly push th e cruise contro l lever for-
ward s C .
or X
Brake, unless th e vehicle is stationary
If you deactivat e DISTRONIC PLUS, th e
DISTRONIC PLU S Off messag e appears in th e
multifunction display fo r approximately fiv e sec -
onds.
i The last speed stored remain s stored until
you switch of f th e engine.
i DISTRONIC PLU S is no t deactivated if you
depress th e accelerator pedal.
DISTRONIC PLU S is automatically deactivated
if: R
you engage th e parking brakeR
ES P ®
intervenes or you deactivat e ES P ®
R
th e transmissio n is in th e P , R or N positionR
you pull th e cruise contro l lever toward s you
in order to pull away and th e front-passenger
doo r or on e of th e rea r doors is ope nR
th e vehicle is skiddingR
you activat e Active Parking Assis t
If DISTRONIC PLU S is deactivated, you will hear
a tone . The DISTRONIC PLU S Off messag e
appears in th e multifunction display fo r approx -
imately fiv e seconds. Tips for drivin g wit h DISTRONI C PLUSGeneral notes Pay particular attention in th e followin g traffic
situations: R
Cornering, enterin g and exitin g a bend: th e
ability of DISTRONIC PLU S to detec t vehicles
when cornering is limited. Your vehicle may
brake unexpectedly or late. R
Driving on a differen t line: DISTRONIC PLU S
may no t detec t vehicles whic h are no t drivin g
in th e middle of their lane. The distanc e to th e
vehicle in fron t will be to o short .R
Other vehicles changin g lane: DISTRONIC
PLU S has no t detecte d th e vehicle cutting in
yet . The distanc e to this vehicle will be to o
short . R
Narro w vehicles : DISTRONIC PLU S doe s no t
detec t th e vehicle in fron t on th e edg e of th e
road because of it s narro w width. The dis -
tanc e to th e vehicle in fron t will be to o short .R
Obstacles and stationary vehicles :
DISTRONIC PLU S doe s no t brake fo r obsta -
cles or stationary vehicles . If , fo r example, th e
detecte d vehicle turn s a corner and reveals an
obstacl e or stationary vehicle, DISTRONIC
PLU S will no t brake fo r these .R
Crossing vehicles : DISTRONIC PLU S may mis -
takenl y detec t ve hicles that are crossin g y our
lane. Activatin g DISTRONIC PLU S at traffic
lights wit h crossin g traffic , fo r example, could
cause your vehicle to pull away unintention -
ally.
In suc h situations, brake if necessary.
DISTRONIC PLU S is then deactivated.
DISTRONI C PLUS wit h Steering Assis t
an d Stop&Go Pilo t
General notes Driving systems 15 5
Driving an d parking Z
Page 159 of 334
still not started to steer and have not taken hold
of the steering wheel after five seconds at the
latest, a warning tone also sounds to remind you
to take control of the vehicle. Steering Assist
and Stop&Go Pilot are switched to passive.
DISTRONIC PLUS remains active.
Activating Steering Assist and Stop&Go
Pilot X
Activate the DISTRONIC PLUS with Steering
Assist and Stop&Go Pilot function using the
on-board computer ( Y
page 196).
The DTR+: Steering Assistant On mes-
sage appears in the multifunction display.
Steering Assist and Stop&Go Pilot are active.
Information in the multifunction display
If Steering Assist and Stop&Go Pilot are activa-
ted but not ready for a steering intervention,
steering wheel symbol C appears in gray. If the
system provides you with support by means of
steering interventions, symbol C is shown in
green.
Deactivating Steering Assist and Stop&Go
Pilot X
Deactivate the DISTRONIC PLUS with Steer-
ing Assist and Stop&Go Pilot function using
the on-board computer ( Y
page 196).
The DTR+: Steering Assistant Off mes-
sage appears in the multifunction display.
Steering Assist and Stop&Go Pilot are deac-
tivated.
When DISTRONIC PLUS is deactivated or not
available, Steering Assist and Stop&Go Pilot are
deactivated automatically. HOLD function
General notes The HOLD function can assist the driver in the
following situations: R
when pulling away, especially on steep slopes R
when maneuvering on steep slopes R
when waiting in traffic
The vehicle is kept stationary without the driver
having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Important safety notes
G WARNING
When leaving the vehicle, it can still roll away
despite being braked by the HOLD function if: R
there is a malfunction in the system or in
the voltage supply. R
the HOLD function has been deactivated by
pressing the accelerator pedal or the brake
pedal, e.g. by a vehicle occupant. R
the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with. R
the battery is disconnected
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
the HOLD function and secure the vehicle
against rolling away.
! When DISTRONIC PLUS or the HOLD func-
tion is activated, the vehicle brakes automat-
ically in certain situations.
To avoid damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or similar situations: R
when towing the vehicle R
in the car washDriving systems 157
Driving and parking Z
Page 162 of 334
selection remains stored even if you remove the
SmartKey from the ignition lock.
Setting raised level X
Start the engine.
If indicator lamp D is not lit:X
Press the C button.
Indicator lamp D lights up. The vehicle height
is adjusted to raised level.
The Vehicle
Rising message appears in the
display.
The "Raised level" setting is canceled if you: R
drive at a speed over approximately 75 mph
(120 km/h) R
drive for approximately three minutes at a
speed over 50 mph (80 km/h)
The "Raised level" remains active when you are
not driving within these speed ranges.
Setting the normal level X
Start the engine.
If indicator lamp D is lit:X
Press button C .
Indicator lamp D goes out. The vehicle is
adjusted to normal level.
Suspension tuning
General notes
The electronically controlled damping system
works continuously. This improves driving
safety and ride comfort. The damping is tuned individually to each wheel
and depends on: R
your driving style, e.g. sporty R
the road surface condition, e.g. bumps R
your individual selection, i.e. sports or com-
fort
Your selection remains stored even if you
remove the SmartKey from the ignition lock.
Sports tuning
The firmer suspension tuning in Sport mode
ensures even better contact with the road.
Select this mode when employing a sporty driv-
ing style, e.g. on winding country roads. X
Press button C .
Indicator lamp D lights up. Sports suspen-
sion tuning is selected.
The AIRMATIC
SPORT message appears in the
multifunction display.
Comfort tuning
In comfort mode, the driving characteristics of
your vehicle are more comfortable. Therefore,
select this mode if you favor a more comfortable
driving style. Select comfort mode also when
driving fast on straight roads, e.g. on straight
stretches of highway.160
Driving systems
Driving and parking
Page 170 of 334
X
Let go of the multifunction steering wheel. X
Back up the vehicle, being ready to brake at all
times. When backing up, drive at a speed
below approximately 6 mph (10 km/h). Oth-
erwise Active Parking Assist will be canceled.
Active Parking Assist brakes the vehicle to a
standstill when the vehicle approaches the
rear border of the parking space.
Maneuvering may be required in tight parking
spaces.
The Park Assist Active Select D
Observe Surroundings message appears in
the multifunction display. X
Shift the transmission to position D while the
vehicle is stationary.
Active Parking Assist immediately steers in
the other direction.
The Park Assist Active Accelerate
and Brake Observe Surroundings mes-
sage appears in the multifunction display.
i You will achieve the best results by waiting
for the steering procedure to complete before
pulling away. X
Drive forwards and be ready to brake at all
times.
Active Parking Assist brakes the vehicle to a
standstill when the vehicle approaches the
rear border of the parking space.
The Park Assist Active Select R
Observe Surroundings message appears in
the multifunction display.
Further transmission shifts may be necessary.
As soon as the parking procedure is complete,
the Park Assist Finished message appears
in the multifunction display and you will hear a
tone. The vehicle is now parked. The vehicle is
kept stationary without the driver having to
depress the brake pedal. The braking effect is
canceled when you depress the accelerator
pedal.
Active Parking Assist no longer supports you
with steering interventions and brake applica-
tions. When Active Parking Assist is finished,
you must steer and brake again yourself.
PARKTRONIC is still available. X
Maneuver if necessary. X
Always observe the warning messages dis-
played by PARKTRONIC ( Y
page 164).
Parking tips: R
The way your vehicle is positioned in the park-
ing space after parking is dependent on vari- ous factors. These include the position and
shape of the vehicles parked in front and
behind it and the conditions of the location. It
may be the case that Active Parking Assist
guides you too far into a parking space, or not
far enough into it. In some cases, it may also
lead you across or onto the curb. If necessary,
you should cancel the parking procedure with
Active Parking Assist. R
You can also select preselect transmission
position D . The vehicle redirects and does not
drive as far into the parking space. Should the
transmission change take place too early, the
parking procedure will be canceled. A sensi-
ble parking position can no longer be ach-
ieved from this position.
Exiting a parking space In order that Active Parking Assist can support
you when exiting the parking space: R
the border of the parking space must be high
enough at the front and the rear. A curb is too
small, for example. R
the border of the parking space must not be
too wide. Your vehicle can be maneuvered
into a position at a maximum of 45° to the
starting position in the parking space. R
a maneuvering distance of at least 3.3 ft
(1.0 m) must be available.
i If PARKTRONIC detects obstacles, Active
Parking Assist brakes automatically whilst the
vehicle exits the parking space. You are
responsible for braking in good time.
Active Parking Assist can only assist you with
exiting a parking space if you have parked the
vehicle parallel to the direction of travel using
Active Parking Assist. X
Start the engine. X
Release the parking brake. X
Switch on the turn signal in the direction you
are pulling away. X
Shift the transmission to position D or R .
The Start Park Assist? Yes: OK No:
8 message appears in the multifunction
display. X
To cancel the procedure: press the 8
button on the multifunction steering wheel or
pull away.
or168
Driving systems
Driving and parking
Page 172 of 334
i The text shown in the multimedia system
depends on the language setting. The follow-
ing are examples of rear view camera displays
in the multimedia system.
Important safety notes The rear view camera is only an aid. It is not a
replacement for your attention to your immedi-
ate surroundings. You are always responsible
for safe maneuvering and parking. When maneu-
vering or parking, make sure that there are no
persons, animals or objects in the area in which
you are maneuvering.
Under the following circumstances, the rear
view camera will not function, or will function in
a limited manner: R
if the trunk lid is open R
in heavy rain, snow or fog R
at night or in very dark places R
if the camera is exposed to very bright light R
if the area is lit by fluorescent bulbs or LED
lighting (the display may flicker) R
if there is a sudden change in temperature,
e.g. when driving into a heated garage in win-
ter R
if the camera lens is dirty or obstructed
Observe the notes on cleaning
( Y
page 274)R
if the rear of your vehicle is damaged. In this
event, have the camera position and setting
checked at a qualified specialist workshop
The field of vision and other functions of the rear
view camera may be restricted due to additional
accessories on the rear of the vehicle (e.g.
license plate holder, bicycle rack).
On vehicles with height-adjustable chassis,
leaving the standard height can result in inac-
curacies in the guide lines, depending on tech-
nical conditions.
i The rear view camera is protected from rain-
drops and dust by means of a flap. When the
rear view camera is activated, this flap opens.
The flap closes again when: R
you have finished the maneuvering process R
you switch off the engine R
you open the trunk
Observe the notes on cleaning ( Y
page 274).
For technical reasons, the flap may remain
open briefly after the rear view camera has
been deactivated. Switching the rear view camera on/off X
To switch on: make sure that the Activa‐
tion by R gear function is selected in the
multimedia system (see Digital Operator's
Manual). X
Engage reverse gear.
The rear view camera flap opens. The multi-
media system shows the area behind the vehi-
cle with guide lines.
The image from the rear view camera is avail-
able throughout the maneuvering process. X
To switch off: shift the transmission to posi-
tion P .
or X
Drive forwards a short distance.
Displays in the multimedia system The rear view camera may show a distorted view
of obstacles, show them incorrectly or not at all.
The rear view camera does not show objects in
the following positions: R
very close to the rear bumper R
under the rear bumper R
in the area immediately above the tailgate
handle
! Objects not at ground level may appear to
be further away than they actually are, e.g.: R
the bumper of a parked vehicle R
the drawbar of a trailer R
the ball coupling of a trailer tow hitch R
the rear section of an HGV R
a slanted post
Use the guidelines only for orientation.
Approach objects no further than the bottom-
most guideline.170
Driving systems
Driving and parking
Page 179 of 334
Exiting 360° camera display mode The 360° camera display is stopped: R
when you select transmission position P , orR
when you are driving at moderate speeds
The previous display appears in the multimedia
system display. You can also switch the display
by selecting the 9 symbol in the display and
pressing 7 the controller to confirm.
ATTENTION ASSIST
General notes ATTENTION ASSIST helps you during long,
monotonous journeys, such as on highways. It is
active in the 37 mph (60 km/ h) to 125 mph
(200 km/h) range. If ATTENTION ASSIST
detects typical indicators of fatigue or increas-
ing lapses in concentration on the part of the
driver, it suggests taking a break.
Important safety notes ATTENTION ASSIST is only an aid. It might not
always recognize fatigue or increasing inatten-
tiveness in time or fail to recognize them at all.
The system is not a substitute for a well-rested
and attentive driver.
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or not
occur at all: R
if the length of the journey is less than approx-
imately 30 minutes R
if the road condition is poor, e.g. if the surface
is uneven or if there are potholes R
if there is a strong side wind R
if you have adopted a sporty driving style with
high cornering speeds or high rates of accel-
eration R
if you are predominantly driving at a speed
below 37 mph (60 km/h) or above 124 mph
(200 km/h) R
if you are driving with the DISTRONIC PLUS
Steering Assist activated R
if the time has been set incorrectly R
in active driving situations, such as when you
change lanes or change your speed The attention level evaluation is deleted and
restarts when the journey is continued, if: R
you switch off the engine R
you take off your seat belt and open the driv-
er's door, e.g. for a change of drivers or to
take a break
Displaying the attention level
In the assistance menu ( Y
page 195) of the on-
board computer you can call up the current sta-
tus information. X
Select the Assistance display for ATTENTION
ASSIST using the on-board computer
( Y
page 195).
The following information appears: R
length of the journey since the last break. R
the attention level determined by ATTENTION
ASSIST, displayed in a bar display in five levels
from high to low. R
if ATTENTION ASSIST is unable to calculate
the attention level and cannot output a warn-
ing, the System Suspended message
appears. The bar display then changes the
display, e.g. if you are driving at a speed below
37 mph (60 km/h) or above 124 mph
(200 km/h).
Activating ATTENTION ASSIST X
Activate ATTENTION ASSIST using the on-
board computer ( Y
page 196).
The system determines the attention level of
the driver depending on the setting selected:
Standard selected: the sensitivity with which
the system determines the attention level is set
to normal.
Sensitive selected: the sensitivity is set
higher. The attention level detected by Attention
Assist is adapted accordingly and the driver is
warned earlier.
When ATTENTION ASSIST is deactivated, the