MERCEDES-BENZ S-CLASS SALOON LONG 2021 Owners Manual

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
If t
If the ball nec
he ball nec k has been e
k has been e xt
xtended:
ended: initiate a new swivel mo vement (/ page 337).
The ball neck will engage beneath the bumper.
If th e display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not loc ked. #
Do not couple up the trailer. Drive on without the trailer. No tethere duced ground clearance due tothe unloc ked
ball nec k. #
Consult a quali/ed specialist workshop.
Please teach in trailer cou-
pling again using the but-
ton in load compartment
Wait for it to extend/
retract *T
he swivel mo vement of the trailer hitch is impaired. #
Use the button on the boot lid totrigger a ne w,comple teswivel mo vement until the ball neck engages beneath the
bumper.
Head-up display currently
unavailable See Owner's
Manual *T
he head-up displ ayistemp orarily una vailable. Possible causes:
R malfunctions in the po wer supply
R signal inter fere nce #
Stop in accordance with the tra1c conditions and switch theve hicle o. and on again. #
Ifth e display message still appears, consult a quali/ed specialist workshop.
Head-up display inoperative *The head-up displ ayhas an internal er ror. #
Consult a quali/ed specialist workshop. 518 518
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Head-up display Brightness
currently reduced See Own-
er's Manual *T
he brightness of the head-up display is reduced. Possible causes:
R Dirt on the windscreen in the camera's /eld of vision
R Faulty exterior brightness signals #
Switch on the windscreen wipers. #
Clean the windscreen if necessar y. #
Switch theve hicle o. and switch it back on #
Ifth e display message still appears, consult a quali/ed specialist workshop.
Ù
Steering malfunction Drive
carefully Visit workshop *A
powe r steering malfunction has occur red. Steering characteristics may be impaired as a result. #
Drive on carefull y. #
Consult a quali/ed specialist workshop.
Ù
Steering malfunction
Increased physical effort
See Owner's Manual *T
he po wer steering assistance is malfunctioning. &
W WARNING
ARNING Risk of an accident due toaltered steering characteristics
If th e po wer assistance of the steering fails partially or comple tely,yo u will need touse more forc eto stee r. #
If safe steering is possible, drive on carefull y. #
Visit or consult a quali/ed specialist workshop immediatel y. Display messages and
warning/indicator lamps
519
519

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Ù
Steering malfunction Stop
immediately See Owner's
Manual *T
he steering is malfunctioning. Steering capability is signi/cantly impaired. &
W WARNING
ARNING Risk of accident if steering capability is impaired
If th e steering does not function as intended, theve hicle's operating saf ety is jeopardised. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and tra1c conditions. Do
not continue driving under any circums tances. #
Consult a quali/ed specialis two rkshop. Ù
Rear axle steering cur-
rently malfunctioning *T
herear axle steering is temp orarily una vailable. The turning circle may become wider. #
Stop theve hicle in accordance with the tra1c conditions and restart theve hicle.
If th e display message does not disappear: #
Drive on carefull y. #
Consult a quali/ed specialist workshop.
Ù
Rear axle steering Malfunc-
tion Visit workshop *T
herear axle steering is malfunctioning.
The rear axle has no steering capability.
The steering wheel may be til ted when you drive in a straight line. #
Adapt your speed and drive on carefull y. #
Consult a quali/ed specialist workshop immediatel y.520 520
Display message
s andwarning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Ù
Rear axle steering Malfunc-
tion Stop immediately *T
herear axle steering is malfunctioning.
The rear axle has no steering capability.
The steering wheel may be til ted considerably when you drive in a straight line.
Depending on the steering wheel's tilted position, the steering wheel will also vibrate and a continuous warning tone
will sound. &
W WARNI NG
ARNI NGRisk of accident if steering capability is impai red
If th e steering does not function as intended, theve hicle's operating saf ety is jeopardised. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and tra1c conditions. Do
not continue driving under any circums tances. #
Consult a quali/ed speciali stwo rkshop. #
When stopping, bear the enlar gedve hicle width in mind.
Snow chain mode Maxi-
mum speed exceeded *T
he maximum permissible speed for snow chain mode has been exceeded. #
Drive more slo wly.
Active bonnet malfunction
See Owner's Manual *T
he active bonn et(pedest rian pr otection) is malfunctioning or inoperative aTer having already been triggered. #
Consult a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
521 521

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
C *A
t least one door is open. #
Close all doors.
Bonnet unlatched Pull lever
again to open *T
he bonn etis not fully unloc ked. &
W WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Toopen the bonnet full y,pull the handle again (/ page 424).
Bonnet not locked Close
before starting journey *T
he bonn etis not loc ked. &
W WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Close the bonnet (/ page 424). 522
522
Display messages and
warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Bonnet not locked Stop
immediately Close bonnet
completely *T
he bonn etis not loc ked. &
W WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Stop theve hicle immediately in accordance with the tra1c conditions. #
Close the bonnet (/ page 424).
M *T
he bonn etis open. &
W
WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Stop theve hicle immediately in accordance with the tra1c conditions. #
Close the bonnet. Display messages and
warning/indicator lamps
523
523

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
N *T
he boot lid is open. &
D
DAN
AN GER
GER Risk of exhaust gas poisoning
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter theve hicle
interior if the boot lid is open when theve hicle is running, especially if theve hicle is in motion. #
Always switch o. theve hicle before opening the boot lid. #
Never drive with the boot lid open. #
Close the boot lid.
Anti-theft alarm system
Malfunction *T
he anti-theT alarm system is malfunctioning. #
Consult a quali/ed specialist workshop.
Ambient light warning sup-
port inoperative *T
he ambient lighting may not pr ovide full visual warning support. #
Lock theve hicle and unlock it again aTer a fewminutes. #
Ifth e display message appears regula rly, contact a quali/ed specialist workshop.
¥
Top up washer fluid *T
hewasher 0uid le vel in thewa sher 0uid reser voir has dropped below the minimum. #
Top up thewa sher 0uid (/ page 428).524 524
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
¥
Intensive cleaning activa-
ted for 30 s *I
ntensi vecleaning of the windscreen has been activated (/ page 181).
Wiper Malfunction *The windscreen wiper is malfunctioning. #
Restart theve hicle.
If th e display message still appears: #
Consult a quali/ed specialist workshop. Engine Engine
Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/conseq uences and
uences andM
MSolutions
Solutions
To switch off the vehicle,
press the Start/Stop but-
ton for at least 3 seconds
or 3 times *Y
ou ha vepressed the start/s top button while theve hicle is in motion. #
Information about switching o. theve hicle while driving (/ page 211). Displ
aymessages and warning/indicator lamps
525 525

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Cannot start vehicle See
Owner's Manual *T
hevehicle cann otbe star ted. #
Switch theve hicle o. and switch it back on #
Ifth e display message still appears, consult a quali/ed specialist workshop.
+
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* N NO
OTE
TE Engine damage due toinsu1cient coolant #
Avoid long journe yswith insu1cient coolant. #
Add coolant (/ page 428). #
Have the engine cooling system checked at a quali/ed specialist workshop.
ÿ
Coolant Stop Switch off
the vehicle *T
he coolant is too hot. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. &
W WARNING
ARNING Risk of burns when opening the bonnet
If yo u open the bonnet in theev ent of an overheated engine or /re in the engine compartment, thefo llowing situa-
tions may occur:
R You may come into contact with hot gases.
R You may come into contact with other escaping hot operating 0uids. 526
526
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Before opening the bonnet, allow the engine tocool down. #
Intheev ent of a /re in the engine compartment, keep the bonnet closed and call the /re service. #
Wait until the engine has cooled down. #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
ÿ *T
here is a malfunction in the engine cooling system. #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
8
Reserve fuel level *T
he fuel supply has dropped into there ser verange. #
Refuel.
! Clean the fuel filter *V
Vehicles wit
ehicles wit h diesel engines:
h diesel engines: the fuel /lter is dirty or thewa ter in the fuel /lter needs tobe drained. #
Consult a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
527
527