warning MERCEDES-BENZ SLC 2019 Manual Online

Storing or calling up a speed
GWARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate
or brake unexpectedly. There is a risk of an
accident.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If
you do not know the stored speed, store the
desired speed again.
XBriefly pull the cruise control lever towardsyou

Active Distance Assist DISTRONIC
General notes
Active Distance Assist DISTRONIC regulatesthe speed and automatically helps you main-tain the distance from the vehicle detected infront. Vehicles are detected with the aid of theradar sensor system. Active Distance AssistDISTRONIC brakes automatically to avoidexceeding the set speed or to maintain thedesignated distance from the vehicle in front.
Change into a lower gear in good time on longand steep downhill gradients. This is especiallyimportant if the vehicle is laden. By doing so,you will make use of the braking effect of theengine. This relieves the load on the brake sys-tem and prevents the brakes from overheatingand wearing too quickly.
If Active Distance Assist DISTRONIC detectsthat there is a risk of a collision with the vehi-cle in front, you will be warned visually andaudibly. Active Distance Assist DISTRONICcannot prevent a collision without your inter-vention. An intermittent warning tone will thensound and the distance warning lamp will lightup in the instrument cluster. Brake immedi-ately in order to increase the distance fromthe vehicle in front, or take evasive action, pro-vided it is safe to do so.
For Active Distance Assist DISTRONIC toassist you when driving, the radar sensor sys-tem must be operational.
Active Distance Assist DISTRONIC operates inthe speed range between 0 mph (0 km/h) and120 mph (200 km/h).
Do not use Active Distance Assist DISTRONICon roads with steep gradients.
As Active Distance Assist DISTRONIC trans-mits radar waves, it can resemble the radardetectors of the responsible authorities. Youcan refer to the relevant chapter in the Opera-tor's Manual if questions are asked about this.
iUSA only: This device has been approvedby the FCC as a "Vehicular Radar System".The radar sensor is intended for use in anautomotive radar system only. Removal,tampering, or altering of the device will voidany warranties, and is not permitted by theFCC. Do not tamper with, alter, or use in anynon-approved way.
Any unauthorized modification to this devicecould void the user's authority to operatethe equipment.
iCanada only: This device complies withRSS-210 of Industry Canada. Operation issubject to the following two conditions:
1. This device may not cause interference,and
2. This device must accept any interferencereceived, including interference that maycause undesired operation of the device.
Removal, tampering, or altering of thedevice will void any warranties, and is notpermitted. Do not tamper with, alter, or usein any non-approved way.
Any unauthorized modification to this devicecould void the user's authority to operatethe equipment.
Important safety notes
GWARNING
Active Distance Assist DISTRONIC does not
react to:
Rpeople or animals
Rstationary objects in the road, e.g. stop-
ped or parked vehicles
Roncoming vehicles and crossing traffic
As a result, Active Distance Assist
DISTRONIC may neither give warnings nor
intervene in such situations. There is a risk
of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
GWARNING
Active Distance Assist DISTRONIC does not
react to:
Rpeople or animals
Rstationary objects in the road, e.g. stop-
ped or parked vehicles (vehicles without
the Driving Assistance package)
Rstationary objects in the road, e.g. stop-
ped or parked vehicles, if sufficient detec-
tion is not possible (vehicles with the Driv-
ing Assistance package)
Roncoming vehicles and crossing traffic
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Driving and pa rking

As a result, Active Distance Assist
DISTRONIC may neither give warnings nor
intervene in such situations. There is a risk
of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
GWARNING
Distance keeping assistant cannot always
clearly identify other road users and com-
plex traffic situations.
In such cases, distance keeping assistant
can:
Raccelerate or brake the vehicle unexpect-
edly
Rintervene unexpectedly
There is a risk of an accident.
Continue to drive carefully and be ready to
brake, especially if distance keeping assis-
tant warns you.
GWARNING
Active Distance Assist DISTRONIC brakes
your vehicle with up to 50% of the maximum
possible deceleration. If this deceleration is
not sufficient, Active Distance Assist
DISTRONIC alerts you with a visual and
acoustic warning. There is a risk of an acci-
dent.
Adjust your speed in these cases and main-
tain sufficient distance.
Apply the brakes yourself and/or take eva-
sive action.
!When Active Distance Assist DISTRONICor the HOLD function is activated, the vehi-cle brakes automatically in certain situa-tions.
To avoid damage to the vehicle, deactivateActive Distance Assist DISTRONIC and theHOLD function in the following or similar sit-uations:
Rwhen towing the vehicle
Rin the car wash
Active Distance Assist DISTRONIC can neitherreduce the risk of an accident if you fail to
adapt your driving style, nor override the lawsof physics. Active Distance Assist DISTRONICcannot take into account road, weather or traf-fic conditions. Active Distance AssistDISTRONIC is only an aid. You are responsiblefor the distance to the vehicle in front, forvehicle speed, for braking in good time and forstaying in your lane.
Do not use Active Distance Assist DISTRONIC:
RIn road and traffic conditions which do notallow you to maintain a constant speed, e.g.in heavy traffic or on winding roads
Ron slippery road surfaces. Braking or accel-erating could cause the drive wheels to losetraction and the vehicle could then skid
RIn poor visibility, e.g. due to fog, heavy rainor snow
Active Distance Assist DISTRONIC may notdetect narrow vehicles driving in front, e.g.motorcycles, or vehicles driving in a staggeredformation.
In particular, the detection of obstacles can beimpaired if:
RThere is dirt on the sensors or anything elsecovering the sensors
RThere is snow or heavy rain
RThere is interference by other radar sources
RThere are strong radar reflections, for exam-ple in parking garages
If Active Distance Assist DISTRONIC no longerdetects a vehicle in front, Distance PilotDISTRONIC may unexpectedly accelerate tothe speed stored.
This speed may:
RBe too high if you are driving in a turninglane or an exit lane
RBe so high when driving in the right-handlane that you overtake vehicles in the left-hand lane
RBe so high in the left lane that you passvehicles driving on the right
If there is a change of drivers, advise the newdriver of the speed stored.
Driving systems145
Driving an d parking
Z

iThe last speed stored remains stored untilyou switch off the engine.
iActive Distance Assist DISTRONIC is notdeactivated if you depress the acceleratorpedal. If you accelerate to overtake, ActiveDistance Assist DISTRONIC adjusts the vehi-cle's speed to the last speed stored afteryou have finished overtaking.
Active Distance Assist DISTRONIC is automati-cally deactivated if:
Ryou engage the electric parking brake or ifthe vehicle is automatically secured with theelectric parking brake
RESP®intervenes or you deactivate ESP®
Rthe transmission is in position],^or\\
Ryou pull the cruise control lever towards youin order to pull away and the front-passenger door is open
Ryou activate Active Parking Assist
Rthe vehicle is skidding
If Active Distance Assist DISTRONIC is deacti-vated automatically, you will hear a warningtone. TheActive Distance Assist OffActive Distance Assist Offmessage will appear on the multifunction dis-play for approximately five seconds.
Tips for driving with Active Distance
Assist DISTRONIC
General notes
The following contains descriptions of certainroad and traffic conditions in which you mustbe particularly attentive. In such situations,brake if necessary. Active Distance AssistDISTRONIC will then be deactivated.
Cornering, going into and coming out of
a bend
The ability of Active Distance AssistDISTRONIC to detect vehicles when corneringis limited. Your vehicle may brake unexpect-edly or late.
Vehicles traveling on a different line
Active Distance Assist DISTRONIC may notdetect vehicles that are not driving in the mid-dle of their lane. The distance to the vehicle infront will be too short.
Other vehicles changing lanes
Active Distance Assist DISTRONIC has notdetected the vehicle cutting in yet. The dis-tance to this vehicle will be too short.
Narrow vehicles
150Driving systems
Driving and parking

Active Distance Assist DISTRONIC has not yetdetected the vehicle in front on the edge ofthe road because of its narrow width. The dis-tance to the vehicle in front will be too short.
Obstructions and stationary vehicles
Active Distance Assist DISTRONIC does notbrake for obstacles or stationary vehicles. If,for example, the detected vehicle turns a cor-ner and an obstacle or stationary vehicle isrevealed, Active Distance Assist DISTRONICwill not brake for them.
Crossing vehicles
Active Distance Assist DISTRONIC may mis-takenly detect vehicles that are crossing yourlane.
If you activate Active Distance AssistDISTRONIC under the following conditions, thevehicle could pull away unintentionally:
Rat traffic lights with crossing traffic, forexample
Rif there is a vehicle in front, after a crossing,with the HOLD function activated
HOLD function
General notes
The HOLD function can assist the driver in thefollowing situations:
RWhen pulling away, especially on steepslopes
RWhen maneuvering on steep slopes
RWhen waiting in traffic
The vehicle is kept stationary without thedriver having to depress the brake pedal.
The braking effect is canceled and the HOLDfunction deactivated when you depress theaccelerator pedal to pull away.
Important safety notes
GWARNING
If the vehicle is only braked using the HOLD
function, the vehicle may roll away in the fol-
lowing situations when you leave the vehi-
cle:
Rif there is a malfunction in the system or
in the voltage supply
Rif the HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. by a vehicle occupant
There is a risk of an accident.
Always deactivate the HOLD function and
secure the vehicle against rolling away
before you leave it.
!When Active Distance Assist DISTRONICor the HOLD function is activated, the vehi-cle brakes automatically in certain situa-tions.
To avoid damage to the vehicle, deactivateActive Distance Assist DISTRONIC and theHOLD function in the following or similar sit-uations:
Rwhen towing the vehicle
Rin the car wash
Deactivating the HOLD function (Ypage 152).
Driving systems151
Driving an d parking
Z

Range of the sensors
General notes
Parking Assist PARKTRONIC does not take intoaccount obstacles located:
Rbelow the detection range, such as persons,animals or objects
Rabove the detection range, e.g. overhangingloads, tail sections or loading ramps oftrucks
CSensors in the front bumper, left-hand side(example)
The sensors must be free from dirt, ice orslush. They can otherwise not function cor-rectly. Clean the sensors regularly, taking carenot to scratch or damage them (Ypage 250).
Range
Front sensors
CenterApprox. 40 in (approx.100 cm)
CornersApprox. 24 in (approx.60 cm)
Rear sensors
CenterApprox. 48 in (approx.120 cm)
CornersApprox. 32 in (approx.80 cm)
Minimum distance
CenterApprox. 8 in (approx.20 cm)
CornersApprox. 6 in (approx.15 cm)
If there is an obstacle within this range, therelevant warning displays light up and a warn-ing tone sounds. If the distance falls below theminimum, the distance may no longer beshown.
154Driving systems
Driving and parking

Warning displays
Warning display for the front area
CSegments on the left-hand side of the vehi-cle
DSegments on the right-hand side of thevehicle

Problems with Parking Assist PARKTRONIC
ProblemPossible causes/consequences andPPSolutions
Only the red segmentsin the Parking AssistPARKTRONIC warningdisplays are lit. You alsohear a warning tone forapproximately two sec-onds.
Parking AssistPARKTRONIC is deacti-vated after approx-imately 20 seconds andthe indicator lamp inthe Parking AssistPARKTRONIC buttonlights up.
Parking Assist PARKTRONIC has malfunctioned and has been deac-tivated.
XIf problems persist, have Parking Assist PARKTRONIC checked ata qualified specialist workshop.
Only the red segmentsin the Parking AssistPARKTRONIC warningdisplays are lit. ParkingAssist PARKTRONIC isdeactivated afterapproximately five sec-onds.
The Parking Assist PARKTRONIC sensors are dirty or there is inter-ference.
XClean the Parking Assist PARKTRONIC sensors (Ypage 250).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or ultra-sound waves.
XCheck to see if Parking Assist PARKTRONIC works at a differentlocation.
Parking Guidance
Important safety notes
Parking Guidance is an electronic parking aidwith ultrasound. Ultrasound is used to meas-ure the road on both sides of the vehicle. Asuitable parking space is indicated by theparking symbol. You receive steering instruc-tions when parking. You can also still useParking Assist PARKTRONIC (Ypage 153).
Parking Guidance is only an aid. It is not areplacement for your attention to your immedi-ate surroundings. You are always responsiblefor safe maneuvering, parking and exiting aparking space. Make sure that there are nopersons, animals or objects in the maneuver-ing area when you are maneuvering or parking.
GWARNING
If objects are located above the detection
range, Parking Guidance may provide steer-
ing instructions too soon. You may cause a
collision as a result. There is a risk of an
accident.
If objects are located above the detection
range, stop and switch off Parking Assist.
!If they cannot be avoided, drive overobstacles such as curbs slowly and at anobtuse angle. Otherwise, you may damagethe wheels or tires.
When Parking Assist PARKTRONIC is switchedoff, Parking Guidance is also unavailable.
Parking Guidance may also display spaces notsuitable for parking, e.g.:
Rwhere parking or stopping is prohibited
Rin front of driveways or entrances and exits
Ron unsuitable surfaces
156Driving systems
Driving and parking

Use Parking Guidance for parking spaces:
Rparallel to the direction of travel
Ron straight roads, not bends
Rthat are on the same level as the road, i.e.not on the pavement, for example. ParkingAssist PARKTRONIC may not detect flatcurbs
Parking tips:
Ron narrow roads, drive as closely as possiblepast the parking space
Rparking spaces that are littered or over-grown might be identified or measuredincorrectly
Rparking spaces that are partially occupiedby trailer drawbars might not be identifiedas such or be measured incorrectly
Rsnowfall or heavy rain may lead to a parkingspace being measured inaccurately
Rpay attention to the Parking AssistPARKTRONIC warning messages during theparking procedure (Ypage 155)
Rwhen transporting a load which protrudesfrom your vehicle, you should not use Park-ing Guidance
Rnever use Parking Guidance with snowchains or an emergency spare wheel moun-ted
RMake sure that the tire pressures are alwayscorrect. This has a direct effect on the steer-ing characteristics.
RThe way your vehicle is positioned in theparking space after parking is dependent onvarious factors. These include the positionand shape of the vehicles parked in frontand behind it and the conditions of the loca-tion. In some cases, Parking Guidance mayguide you too far or not far enough into aparking space. In some cases, it may alsolead you across or onto the curb. If neces-sary, cancel the parking procedure withParking Guidance.
Detecting parking spaces
CDetected parking space on the left
DParking symbol

Vehicles with automatic transmission: shiftthe transmission to position^.The multifunction display shows theBeBeAware of Obstacles Near the Vehi‐Aware of Obstacles Near the Vehi‐cle Press 'OK' to Confirmcle Press 'OK' to Confirmmessage.
XPress thevbutton on the multifunctionsteering wheel to confirm.The multifunction display switches to Park-ing Guidance.
Depending on your distance from the park-ing space, thePlease Drive BackwardPlease Drive Backwardmessage will appear in the multifunction dis-play.
XIf necessary, reverse towards the parkingspace. This is indicated by an arrow pointingbackwards.Continue backing up until you hear a tone.Then stop; the stop position has beenreached. The arrow is white.
ThePlease Steer Wheel to the RightPlease Steer Wheel to the RightorPlease Steer Wheel to the LeftPlease Steer Wheel to the Leftmessage appears in the multifunction dis-play.
Backing up into the parking space
XWhile the vehicle is stationary, turn thesteering wheel in the specified direction
until the arrow is white and a warning tonesounds.
XTo back up into a parking space:maintainthe steering wheel angle and back up care-fully.
XStop as soon as you hear a warning tone.The vehicle has reached the position inwhich you need to countersteer.
ThePlease Steer Wheel to the RightPlease Steer Wheel to the RightorPlease Steer Wheel to the LeftPlease Steer Wheel to the Leftmessage appears in the multifunction dis-play.
XTo countersteer:while the vehicle is sta-tionary, turn the steering wheel in the speci-fied direction until the arrow is white and awarning tone sounds.
XTo back up into a parking space:maintainthe steering wheel angle and back up care-fully.
XStop as soon as you hear a warning tone. Atthe latest, stop as soon as Parking AssistPARKTRONIC sounds the continuous warn-ing tone.TheParking Guidance FinishedParking Guidance Finishedmes-sage appears in the multifunction displayand a tone sounds. You may be asked tosteer in a different direction and thenchange gear. In this case, further displays inthe multifunction display will direct you tothe final position.
XManeuver if necessary.
XObserve the warning messages displayed byParking Assist PARKTRONIC (Ypage 155).
Canceling Parking Guidance
XPress the Parking Assist PARKTRONIC but-ton on the center console (Ypage 155).Parking Guidance is immediately canceledand Parking Assist PARKTRONIC is switchedoff.
Parking Guidance is canceled automatically ifit is no longer possible to guide you into theparking space, or if a malfunction occurs.
The parking space symbol goes out and awarning tone sounds.
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Driving and parking