Lane Keeping Assist does not keep your vehicle
in its lane.
The system may be impaired or may not function
if:
Rif the vehicle is incorrectly loaded
(Ypage 212)
Rthere is poor visibility, e.g. due to insufficient
illumination of the road, or due to snow, rain,
fog or spray
Rthere is glare, e.g. from oncoming traffic, the
sun or reflection from other vehicles (e.g. if
the road surface is wet)
Rthe windshield is dirty, fogged up, damaged or
covered, for instance by a sticker, in the vicin-
ity of the camera
Rno, or several, unclear lane markings are pres-
ent for one lane, e.g. in a construction area
Rthe lane markings are worn away, dark or cov-
ered up, e.g. by dirt or snow
Rthe distance to the vehicle in front is too small
and the lane markings thus cannot be detec-
ted
Rthe lane markings change quickly, e.g. lanes
branch off, cross one another or merge
Rthe road is narrow and winding
Rthere are highly variable shade conditions on
the road
A warning may be given if a front wheel passes
over a lane marking. In addition, a warning tone
sounds and the Ãindicator lamp in the
instrument cluster flashes red.
Activating/deactivating Lane Keeping
Assist
Lane Keeping Assist is automatically activated
when you start the engine.
XTo deactivate: press thejbutton in the
center console (Ypage 35).
On vehicles without steering wheel but-
tons:
OFF
flashes briefly in the display and the Ã
indicator lamp in the instrument cluster
flashes yellow and then lights up continu-
ously.
On vehicles with steering wheel buttons:
The Lane
Keep.AssistDeactivatedmes-
sage appears in the display and the Ã
indicator lamp in the instrument cluster
flashes yellow and then lights up continu-
ously. Lane Keeping Assist is deactivated.
XTo activate:
press thejbutton in the
center console again (Ypage 35).
On vehicles without steering wheel but-
tons:
on
flashes briefly in the display and the Ã
indicator lamp in the instrument cluster goes
out. If a lane marking is detected, the Ã
indicator lamp lights up green.
On vehicles with steering wheel buttons:
The Lane Keep. Assist Activated
mes-
sage appears in the display and the Ã
indicator lamp in the instrument cluster goes
out. If a lane marking is detected, the Ã
indicator lamp lights up green.
Lane Keeping Assist is activated.
A Lane Keeping Assist warning is suppressed if:
Ra driving safety system intervenes, such as
ABS, BAS or ESP®.
Ryou have set the turn signal and a lane change is detected. In this case, the warnings are
suppressed for a certain period of time.
Ryou accelerate hard, e.g. kickdown on vehi-
cles with an automatic transmission.
Ryou brake hard.
Ryou steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
Ryou cut the corner on a sharp bend.
In order that you are warned only when neces-
sary and in good time if you cross the lane mark-
ing, the system recognizes certain conditions
and warns you accordingly.
Lane Keeping Assist warns you earlier if:
Ryou approach the outer lane marking on a
bend.
Rthe road has very wide lanes, e.g. a freeway.
Rthe system recognizes solid lane markings.
Warnings are given later if:
Rthe road has narrow lanes.
Ryou cut the corner on a bend.
All-wheel drive
Important safety notes
!Never tow the vehicle with one axle raised.
This may damage the transfer case. Damage
of this sort is not covered by the Mercedes-
Benz Limited Warranty. All wheels must
Driving systems147
Driving and parking
Z
Display messagesPossible causes/consequences andMSolutions
4
Engine oil levelStop, turnengineoff
There is no tenough or no oil in th eengine. There is adanger of engin e
damage.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth eoil level wit hth eoil dipstick (Ypage 221).
XIf theengin eoil level is correct: hav eth emalfunction rectifie d
immediately at aqualified specialist workshop .
XIf theengin eoil level is to olow: hav eth evehicl etowed to aqualified
specialist workshop .
4
Oil sensor Visitworkshop
There isamalfunction in th eengin eoil level display.
XHav eth evehicl echecke dimmediately at aqualified specialist
workshop .
Driving systems
Display messagesPossible causes/consequences and MSolutions
_ _ _
Cruise control
The activation condition sfor cruise control hav eno tbeen met .
You can only activat ecruise control from speeds of 20 mph
(30 km/h).
Cruise contro l
Visit workshop
Cruisecontrol has been deactivated due to amalfunction .
XHavecruise control checke dat aqualified specialist workshop .
LaneKeep. AssistTemporarilyUnavailable
and th eà indicator lamp lights up yellow.
Lan eKeepin gAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThere are no lan emarking spresent.
RThe camera' sfunctionalit yis impaire ddue to heav yrain ,snow or
fog .
RThe camera canno trecogniz eth eroa dmarkings:
-It is to odark .
-The lan emarking sare wor nor are covered, for example, by dir tor
snow.
RThe windshield is dirty in th ecamera' sfield of vision .
XStop thevehicl epayin gattention to roa dand traffic conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 130).
XClean th ewindshield (Ypage 235), particularly in th ecamera' s
field of vision .
If th eà indicator lamp goe sout ,Lan eKeepin gAssis tis opera-
tional again .
LaneKeep. AssistInoperativeLan eKeepin gAssis tis faulty.
XHav eLan eKeepin gAssis tchecke dat aqualified specialist work-
shop.
190Display messages
On-board computer and displays
ProblemPossible causes/consequences andMSolutions
Ã
The green Lane
Keeping Assist
indicator lamp
lights up while
you are driving.Lane Keeping Assist is operational.
ÃThe red Lane
Keeping Assist
indicator lamp
lights up while
you are driving.
Additionally, an
intermittent
warning tone
sounds.You are driving with the front wheel on a lane marking.
dThe yellow
ASR/ESP®warn-
ing lamp flashes
while the vehicle
is in motion.GWARNING
ESP
®or ASR is intervening because at least one of the wheels has
reached its tire grip limit.
Cruise control is deactivated for the duration of the intervention.
XAdapt your driving style to suit the road and traffic conditions. Do
not use too much throttle.
XDrive slowly.
d The yellow
ASR/ESP®warn-
ing lamp is lit
while the engine
is running.
The all-wheel drive is activated/deactivated. When changing gear,
ASR and ESP®are deactivated.
After changing gear, ASR and ESP®are automatically reactivated.
Engage/disengage the all-wheel drive (
Ypage 148).
d The yellow
ASR/ESP®warn-
ing lamp flashes
slowly while the
vehicle is in
motion.
In vehicles with all-wheel drive the brake system is overheated.
GWARNING
The performance of 4ETS is reduced. The braking power output may
be lower.
There is a risk of an accident.
XDrive on carefully and adapt your driving style to suit the road and
traffic conditions.
XWhen the message is no longer displayed, 4ETS and normal braking
power are available again.
d The yellow
ASR/ESP®warn-
ing lamp is lit
while the engine
is running.
ASR is deactivated.
GWARNING
The driven wheels can spin when accelerating.
There is an increased risk of skidding and accidents.
XActivate ASR again. Exceptions (Ypage 53).
194Indicator and warning lamps in the instrument cluster
On-board computer and displays
