engine MERCEDES-BENZ S-CLASS SALOON LONG 2020 Service Manual

Opening
theAd Blue ®
filler cap #
Press on the back area of fuel filler flap 1. #
Turn AdBlue ®
filler cap 2anti-clockwise and
re mo veit.
% You can also store theAd Blue ®
filler cap in
th e fuel filler cap holder in the fuel filler flap
hin gearm. To
p up AdBlue ®
Mercedes-Benz recommends topping up
Ad Blue ®
at a filling pump. If no AdBlue ®
filling
pump is available, you can also top up AdBlue ®
using a cani ster. #
Screw onthefast ener of AdBlue ®
re fill canis‐
te r4. #
Screw disposable hose 3onto the opening
of Ad Blue ®
re fill canis ter4 until hand-tight. #
Screw disposable hose 3onto thefiller
neck of theve hicle until hand-tight. #
Lift up and tip AdBlue ®
re fill canis ter4.
The filling process stops when theAd Blue ®
ta nk is compl etely full.
Ad Blue ®
re fill canis ter4 can be remo ved
when it has been only partially em ptied. #
Unscr ew and close disposable hose 3and
Ad Blue ®
re fill canis ter4 inreve rse order. #
Replace AdBlue ®
filler cap 2and turn it
clockwise until it audibly engages. #
Close fuel filler flap 1. #
Swit chon the ignition for at least 60 sec‐
onds.
% Ifth e engine could not be star ted due tothe
Ad Blue ®
tan k being empty, it can take up to
60 seconds forth eto p up tobe de tected. #
Start theve hicle. Driving and parking
211

#
Bring theve hicle toast andstill bypressing
th e brake pedal. #
On gradients, turn the front wheels so that
th eve hicle will rollto wa rdsth eke rb if it
st arts moving. #
App lythe electric parking brake. #
Enga getransmission position jin a station‐
ary vehicle with the brake pedal applied
(/ page 203). #
Switch off the engine and the ignition by
pressing the1 button. #
Release the service brake slowl y. #
Get out of theve hicle and lock it.
% When you park theve hicle, you can still
opera tethe side windo wsand the panoramic
sliding sunroof for appro ximately four
minutes if the driver's door is closed. Garage door opener
Prog
ramming buttons for the garage door
opener &
DANG ER Risk of death caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and leads topoisoning. #
Never lea vethe engine or, if present,
th e auxiliary heating running in an
enclosed space wi thout suf ficient venti‐
lation. &
WARNING Risk of inju rywhen opening
or closing a door with thega rage door
opener
When you operate or program the door with
th e integrated garage door opener, persons
in thera nge of mo vement of the door may
become trapped or be stru ck bythe door. #
Alw ays make sure that nobody is within
th era nge of mo vement of the door. Re
quirements:
R The vehicle has been par ked outside the
ga rage or outside thera nge of mo vement of
th e door.
R The engine is switched off.
R The ignition is switched on.
% The garage door opener function is alw ays
av ailable when the ignition is switched on. Driving and parking
213

#
Hold remo tecontrol 5atthe same angles
at various dis tances in front of the inside rear
view mir ror.Yo u should test eve ryposition
fo r at least 25 seconds before trying ano ther
position. #
Onremo tecontrols that transmit on lyfor a
limi ted period, press button 6onremo te
control 5again before transmission ends. #
Align the aerial line of the door opener unit
with there mo tecontrol.
% Support and additional information on pro‐
gramming:
R Onthe HomeLink ®
Hotline on (0) 08000
466 354 65 or +49 (0) 6838 907-2 77
R Onthe Internet at https://
www.homelin k.com
Opening or closing the garage door
Requ irements:
R The cor responding button is programmed to
operate the door. #
Press and hold buttons 1,2or3 until
th e door opens or closes. #
If indicator lamp 4flashes yellow af ter
appr oximately 20 seconds: press and hold
th e pr eviously pressed button again until the
door opens or closes.
Clearing thega rage door opener memo ry #
Press and hold buttons 1and 3.
Indicator lamp 4lights up yello w. #
If indicator lamp 4flashes green: release
buttons 1and 3.
The entire memo ryhas been dele ted. Electric parking brake
Fu
nction of the electric pa rking brake (app ly‐
ing automatically) &
WARNING Risk of accident and inju ry
due toleaving children unat tended in the
ve hicle
If ch ildren are left unat tended in theve hicle,
th ey could, in pa rticular:
R open doors, thereby endangering other
persons or road users. R
get out and be stru ck byoncoming traf‐
fi c.
R ope rate ve hicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unat tended in the
ve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. The elect
ric pa rking brake is applied if the trans‐
mission is in position jand one of thefo llow‐
ing conditions is fulfilled:
R The engine is switched off. Driving and parking
215

R
The seat belt tongue is not inser ted in the
seat belt buckle of the driver's seat and the
driver's door is opened.
% Toprev ent application: pull the handle of the
electric parking brake (/ page217).
In thefo llowing situations, the electric parking
brake is also applied:
R Active Dis tance Assi stDISTRONIC is bringing
th eve hicle toast andstill.
R The HOLD function is keeping theve hicle sta‐
tionar y.
R Active Parking Assist is keeping theve hicle
st ationar y.
This is the case if one of thefo llowing conditions
is also fulfilled:
R The engine is switched off.
R The seat belt tongue is not inser ted in the
seat belt buckle of the driver's seat and the
driver's door is opened.
R There is a sy stem malfunction.
R The po wer supply is insuf ficient.
R The vehicle is stationary for a lengt hyperiod. When
the electric parking brake is applied, the
re d! indicator lamp lights up in the driver's
displa y.
The electric parking brake is not automatically
applied if the engine is switched off bythe ECO
st art/ stop function.
Electric parking brake function (releasing
automatically)
The electric parking brake is released when the
fo llowing conditions are fulfilled:
R The driver's door is closed.
R The engine is running.
R The transmission is in position hork and
yo u depress the accelera tor pedal or you
shift from transmission position jtoh or
k when on le velground withthe driver's
door closed.
R Ifth e transmission is in position k,the boot
lid must be closed.
R The seat belt tongue is inser ted into the seat
belt buckle of the driver's seat. If
th e seat belt tongue is not inser ted into the
seat belt buckle of the driver's seat, one of
th efo llowing conditions must be fulfilled:
- You shift from transmission position j.
- You ha veprev iously driven at speeds
greater than 3 km/h.
When the electric parking brake is released, the
re d! indicator lamp in the driver's display
goes out. 216
Driving and pa rking

St
andby mode (extension of the star ter bat‐
te ry 's period out of use) St
andby mode function
% This function is not available for all models.
If standby mode is activated, ene rgy loss will be
minimised during extended pe riods of non-oper‐
ation.
St andby mode is characterised bythefo llowing:
R The star ter battery is preser ved.
R The maximum non-operational time appears
inthe driver's displa y.
R The connection toonline services is inter rup‐
te d.
If th efo llowing conditions are fulfilled, standby
mode can be activated or deactivated using the
multimedia sy stem:
R The engine is switched off.
R The ignition is switched on.
Exceeding theve hicle's displa yed non-opera‐
tional time may cause incon venience; i.e. it can‐
not be guaranteed that thest ar ter battery will
re liably start the engine. Charge
thest ar ter battery in thefo llowing situa‐
tions:
R The vehicle's non-operational time must be
ex tended.
R The star ter battery charge leve l is insuf ficient
fo rst andby mode.
% Standby mode is automatically deactivated
when the ignition is switched on.
Ac tivating/deactivating standby mode (park‐
ing up theve hicle)
Re quirements:
R The engine is switched off.
Multimedia sy stem:
4 © 5
Settings 5
Vehicle
5 Opening/closing #
Activate or deacti vate Standby mode. Driving and driving saf
ety sy stems Driving sy
stems and your responsibility Yo
ur vehicle is equipped with driving sy stems
which assist you in driving, parking and manoeu‐
vring theve hicle. The driving sy stems are only
aids. They are not a substitute foryo ur attention
to the sur roundings and do not relie ve you of
yo ur responsibility per taining toroad traf fic la w.
The driver is alw aysre sponsible for maintaining
a safe dis tance totheve hicle in front, forve hicle
speed, for braking in good time and forst ay ing
in lane. Pay attention tothe tra ffic conditions at
all times and inter vene when necessa ry. Be
aw are of the limitations rega rding the safe use of
th ese sy stems.
Driving sy stems can neither reduce therisk of
accident if youfa ilto adapt your driving style nor
ove rride the la wsof ph ysics. They cannot alw ays
ta ke into account road, weather or traf fic condi‐
tions. Driving and pa
rking 219

If ABS inter
venes when braking, you will feel a
pulsing in the brake pedal. The pulsating brake
pedal can be an indication of hazardous road
conditions and can ser veas a reminder totake
ex tra care while driving. Fu
nction of BAS The Brake Assist Sy
stem (BAS) supports your
eme rgency braking situation with additional
brake forc e.
If yo u depress the brake pedal quickl y,BA S is
acti vated:
R BAS au tomatical lyboosts the brake pres‐
sure.
R BAS can sho rten the braking dis tance.
R ABS pr events the wheels from locking.
The brakes will function as usual once you
re lease the brake pedal. BAS is deactivated. Fu
nction of ESP ®
(Electronic Stability Pro‐
gr am) &
WARNING Risk of skidding if ESP ®
is
deactivated
If yo u deactivate ESP ®
, ESP ®
cannot car ry
out vehicle stabilisation. #
ESP ®
should on lybe deactivated in the
fo llowing situations. ESP
®
can monitor and impr ovedriving stability
and traction in thefo llowing situations, within
ph ysical limits:
R When pulling away on wet or slippe rycar ria‐
ge wa ys.
R When braking.
If th eve hicle deviates from the direction desired
by the driver, ESP ®
can stabilise theve hicle by
inter vening in thefo llowing ways:
R One or more wheels are braked.
R The engine output is adap ted according to
th e situation. When ESP
®
is deactivated, theå warning
lamp lights up continuously:
R Driving stability will no lon ger be impr oved.
R The drive wheels could spin.
R ETS/4ETS traction control is still active.
% When ESP ®
is deactivated, you are still assis‐
te dby ESP ®
when braking.
When the÷ warning lamp flashes, one or
se veral wheels has reached its grip limit:
R Adapt your driving style to suit the cur rent
ro ad and weather conditions.
R Do not deactivate ESP ®
.
R Only depress the accelerator pedal as far as
is necessary when pulling away.
Deactivate ESP ®
in thefo llowing situations to
impr ovetraction:
R When using snow chains.
R In deep sn ow.
R On sand or gr avel. 222
Driving and parking

%
Spinning the wheels results in a cutting
action, which enhances traction.
If th e÷ ESP®
wa rning lamp lights up continu‐
ousl y,ESP ®
is not available due toa malfunction.
Obse rveth efo llowing information:
R Warning and indicator lamps (/ page 550)
R Display messages (/ page 492)
ETS/4ETS (Electronic Traction Sy stem)
ETS/4E TStraction control is pa rtof ESP ®
and
makes it possible topull away and accelerate on
a slippe rycar riag ew ay.
ETS/4ETS can impr ovetheve hicle's traction by
inter vening in thefo llowing ways:
R The drive wheels are braked individually if
th ey spin.
R More drive torque is transferred tothe wheel
or wheels with traction.
Influence of drive prog rams on ESP ®
The drive prog rams enable ESP ®
to adapt todif‐
fe re nt we ather and road conditions as well as
th e driver's prefer red driving style. Depending on
th e selected drive program, the appropriate ESP
®
mode will be activated. You can select the
drive programs using theDY NA MIC SELECT
switch (/ page 200). Fu
nction of ESP ®
Crosswind Assist ESP
®
Crosswind Assist de tects sudden gu sts of
side wind and helps the driver tokeep theve hi‐
cle in the lane:
R ESP ®
Crosswind Assist is active at vehicle
speeds between appr ox.75 km/h and
200 km/h when driving stra ight ahead or
cornering slight ly.
R The vehicle is stabilised bymeans of individ‐
ual brake application on one side. Fu
nction of ESP ®
trailer stabilisation &
WARNING Risk of accident in poor road
and weather conditions
In poor road and weather conditions, the
trailer stabilisation cannot pr event lur ching of
th eve hicle/trailer combination. Trailers with a high centre of gr
avity may tip over before
ESP ®
de tects this. #
Alw ays adapt your driving style to suit
th e cur rent road and weather condi‐
tions. When driving with a trailer, ESP
®
can stabilise
yo ur vehicle if the trailer begins toswer vefrom
side toside:
R ESP ®
trailer stabilisation is active abo ve
speeds of 65 km/h.
R Slight swerving is reduced bymeans of a tar‐
ge ted, individual brake application on one
side.
R Intheeve nt of se vere swerving, the engine
output is also reduced and all wheels are
braked.
ESP ®
trailer stabilisation may be impaired or
may not function if:
R The trailer is not connec ted cor rectly or is
not de tected prope rly by theve hicle. Driving and parking
223

Ac
tivating/deactivating the HOLD function &
WARNING Risk of an accident due tothe
HOLD function being active when you
lea vetheve hicle
If th eve hicle is only braked with the HOLD
function it could, in thefo llowing situations,
ro llaw ay:
R Ifth ere is a malfunction in the sy stem or
in the po wer supply.
R Ifth e HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. byave hicle occupant. #
Alw ays secure theve hicle against roll‐
ing away before you lea veit. Re
quirements:
R The vehicle is stationar y.
R The driver's door is closed or the seat belt on
th e driver's side is fastened.
R The engine is running or has been au tomati‐
cally switched off bythe ECO start/ stop
function. R
The electric parking brake is released.
R Active Dis tance Assi stDISTRONIC is deacti‐
va ted.
R The transmission is in position h,kori.
Ac tivating the HOLD function #
Dep ress the brake pedal, and af ter a short
time quickly depress fur ther until theë
display appears in the driver's displa y. #
Release the brake pedal.
Deactivating the HOLD function #
Depress the accelerator pedal topull away.
or #
Depress the brake pedal until theë dis‐
play disappears from the driver's displa y.
The HOLD function is deactivated in thefo llow‐
ing situations:
R Active Dis tance Assi stDISTRONIC is acti va‐
te d.
R The transmission is shif tedto position j.
R The vehicle is secured with the electric park‐
ing brake. In
thefo llowing situations, theve hicle is held by
transmission position jand/or bythe electric
parking brake:
R The seat belt is unfas tened and the driver's
door is opened.
R The vehicle is switched off.
R There is a malfunction in the sy stem or the
po we r supp lyis insuf ficient.
In addition, theBrake immediately message may
appear in the driver's display and a horn tone
may sound at regular inter vals. #
Immediately depress the brake pedal firm ly
until thewa rning message disappears.
The HOLD function is deactivated. #
Additionally secure theve hicle against rolling
aw ay. Fu
nction of Hill Start Assist Hill
Start Assist holds theve hicle for a short
time when pulling away on a hill under thefo l‐
lowing conditions:
R The transmission is in position hork. Driving and parking
225

The
following information is displa yed in the
driver display:
R The length of the journey since the last break
R The attention le vel de term ined byATTENTION
ASSIS T:
- The more segments 2ofthe circle dis‐
pla yed, the higher the de tected attention
le ve l.
- Fewe r segments 2are displa yed in the
circle as the attention le vel decreases.
R Microsleep de tection 1status:
- Deactivated: display 1is hidden. -
Activated but not operational: display 1
is gr ey.
- Activated and operational: display 1is
green.
If AT TENTION ASSIST is unable tocalculate the
attention le vel and cannot issue a warning, the
System suspended messageappears.
If th e sy stem, which uses the driver camera,
de tects indicators of microsleep, theATTEN-
TION ASSIST Microsleep Take a break! warning
message appears in the driver display and a
wa rning tone sounds simultaneously. This warn‐
ing message must be con firm ed byTouch Con‐
trol. It is recommended that you take a break
immediatel y.
If a warning is given in the driver displa y,the
multimedia sy stem of fers to sear chfor a rest
area. You can select a rest area and start naviga‐
tion tothis rest area.
AT TENTION ASSIST with microsleep de tection is
acti vated automatically when the engine is
re star ted. The last selected sensitivity le vel
re mains stored. Sy
stem limits
AT TENTION ASSIST is active in the 60 km/h to
200 km/h speed range.
The microsleep de tection function is available at
a speed of 20 km/h and abo ve.
Pa rticularly in thefo llowing situations, ATTEN‐
TION ASSIST only functions in a restricted man‐
ner and warnings may be dela yed or not occur:
R Ifyo u ha vebeen driving for less than appr ox‐
imately 30 minutes.
R Ifth ero ad condition is poor (une venro ad
sur face or po tholes).
R Ifth ere is a strong side wind.
R Ifyo u adopt a sporty driving style (high cor‐
nering speeds or high rates of acceleration).
R Ifth eSt eering Assist function of Active Dis‐
ta nce Assi stDISTRONIC is acti ve.
R Ifth e clock is set tothe incor rect time.
R Ifyo uch ange lanes and vary your speed fre‐
qu ently In active driving situations. Driving and parking
227

Microsleep de
tection also does not function
when the driver camera cann otdetect theey es
of the driver, as a result of thefo llowing factors,
fo rex ample:
R The driver's eyes are co vered due tothe
st eering column position, forex ample.
R Poor lighting conditions.
R Some types of spectacles or sunglasses.
R The driver's line of vision is outside the driver
camera's field of vision.
Also obser veany information rega rding display
messages that can be displa yed in the driver dis‐
pla y.
The tiredness and alertness assessment of
AT TENTION ASSIST with microsleep de tection is
re set and restar ted when continuing the journey
in thefo llowing situations:
R Ifyo u swit choff the engine.
R Ifyo u unfas tenyo ur seat belt and open the
driver's door (e.g. tochange drivers or take a
break). Setting
ATTENTION ASSI ST
Multimedia sy stem:
4 © 5
Settings 5
Assistance
5 Assistance 5
ATTENTION ASSIST
Setting the sensitivity #
Tapth e cur rent setting. #
Select Standard orSensitive .
Ac tivating/deactivating the mic rosleep
wa rning #
Activate/deactivate Microsleep warning. Limiter
Fu
nction of the limiter
The limiter restricts the speed of theve hicle. To
re duce the speed tothe set speed, the limiter
applies the brakes automaticall y.
Yo u can limit the speed as follo ws:
R Variable: for a short-term speed restriction,
e.g. in built-up areas
R Perm anen t:for a longer-term speed restric‐
tion, e.g. in winter tyre mode The
variable limiter is operated using the cor re‐
sponding steering wheel buttons (/ page 232).
Yo u can store any speed abo ve20 km/h up to
th e maximum design speed or up tothe set win‐
te r tyre limit. You can also per form settings
while theve hicle is stationary if theve hicle has
been star ted.
Obser vethe no tes on driving sy stems and your
re sponsibility; you may otherwise failto recog‐
nise dangers (/ page 219).
Messages in the driver display
R È (gre y): variable limiter is selec ted but
not yet acti vated.
R È (flashes gr ey):va riable limiter is temp o‐
rari lypassive.
R È (green): variable limiter is activated.
A stored speed appears under theÈ display
and is indicated in the speedome ter.
When the driving speed is greater than the
st ored speed, theÈ display flashes. 228
Driving and parking