steering MERCEDES-BENZ S-CLASS COUPE 2015 Service Manual

Problem
Possible causes/consequences and
M
MSolutions The coolant tempera-
ture display is showing
more than 120 †. A
display message may
also appear in the mul-
tifunction display and a
warning tone may
sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 342). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic. Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do not simultaneously accelerate. G
WARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake. DIRECT SELECT lever
Overview of transmission positions j
Park position with parking lock
k Reverse gear
i Neutral
h Drive
The DIRECT SELECT lever is on the right of the
steering column.
The DIRECT SELECT lever always returns to
its original position. The current transmission position P,R, Nor Dappears in the transmis-
sion position display (Y page 171) in the mul-
tifunction display. Automatic transmission
169Driving and parking Z

The program selector button influences:
R the drive program (Y page 174)
R the engine management
On Mercedes-AMG vehicles, drive program E
is called drive program C.
The automatic transmission switches to auto-
matic drive program E(drive program Cin
Mercedes-AMG vehicles).
All vehicles (except Mercedes-AMG vehi-
cles) E
Economy Comfortable, economical
driving
S
Sport Sporty driving style
You can also activate manual drive program
M
using the steering wheel gearshift paddles
(Y page 175). In manual drive program M,
you can briefly change gear yourself by using
the steering wheel gearshift paddles.
Mercedes-AMG vehicles C
Controlled
Efficiency Comfortable, economical
driving
S
Sport Sporty driving style
M
Manual Manual gearshifting
Permanent drive program
Mis only available
for Mercedes-AMG vehicles.
Further information about permanent drive
program M(Y page 176).
You can also activate manual drive program
M using the steering wheel gearshift paddles
(Y page 175). In manual drive program M,
you can briefly change gear yourself by using
the steering wheel gearshift paddles.
For further information on the automatic drive program, see (Y page 174). Steering wheel gearshift paddles
You can activate manual drive program
Min
the E(C in AMG vehicles) and Sautomatic
drive programs using steering wheel gearshift paddles :and ;(Ypage 175). In manual
drive program M, you can briefly change gear
yourself by using the steering wheel gearshift
paddles.
Mercedes-AMG vehicles: you can also acti-
vate manual drive program Mwith the pro-
gram selector button (Y page 176). In man-
ual drive program M, you can permanently
change gear yourself by using the steering
wheel gearshift paddles. Automatic drive program
Automatic drive program E Drive program
E(drive program Con
Mercedes-AMG vehicles) is characterised by
the following:
R comfort-oriented engine settings.
R optimal fuel consumption resulting from
the automatic transmission shifting up
sooner.
R the vehicle pulling away more gently in
forward and reverse gears unless the accel-
erator pedal is depressed fully.
R the vehicle having improved driving stabil-
ity, for example on slippery road surfaces.
R the automatic transmission shifting up
sooner. This results in the vehicle being 174
Automatic transmissionDriving and parking

driven at lower engine speeds and the
wheels being less likely to spin.
Automatic drive program S Drive program
Sis characterised by the fol-
lowing:
R sporty engine settings
R the vehicle pulling away in first gear.
R the automatic transmission shifting up
later.
R as a result of the later automatic transmis-
sion shift points, the fuel consumption pos-sibly being higher.
Manual drive program M General notes
In this drive program, you can briefly change
gear yourself by using the steering wheel
gearshift paddles. The transmission must be
in position
D.
You can activate manual drive program Min
the E(C in Mercedes-AMG vehicles) and S
automatic drive programs.
Mercedes-AMG vehicles: as well as tempo-
rary drive program M, you can also activate
permanent drive program M. Further infor-
mation about permanent drive program M
(Y page 176).
Activating
X Shift the transmission to position D.
X Pull the left or right steering wheel gearshift
paddle (Y page 174).
Manual drive program Mis temporarily acti-
vated.
All vehicles (except Mercedes-AMG
vehicles:) M and the selected gear appear
in the multifunction display.
Shifting gears
If you pull on the left or right-hand steering
wheel gearshift paddle, the automatic trans-
mission switches to manual drive program M
for a limited amount of time. Depending on which gearshift paddle is pulled, the auto-
matic transmission immediately shifts into
the next gear up or down, if permitted.
X To shift up: pull the right-hand steering
wheel gearshift paddle (Y page 174).
The automatic transmission shifts up to the
next gear.
If the maximum engine speed on the cur-
rently engaged gear is reached and you
continue to accelerate, the automatic
transmission automatically shifts up in
order to prevent engine damage.
Mercedes-AMG vehicles: the automatic
transmission will not shift up to the next
gear when the engine speed is very low.
X To shift down: pull on the left-hand steer-
ing wheel gearshift paddle (Y page 174).
The automatic transmission shifts down to
the next gear.
If the engine exceeds the maximum engine speed when shifting down, the automatic
transmission protects against engine dam- age by not shifting down.
Automatic downshifting occurs when
coasting.
Gearshift recommendation The gearshift recommendations assist you in
adopting an economical driving style. The rec- ommended gear is shown in the multifunction
display.
X Shift to recommended gear ;according
to gearshift recommendation :when
shown in the multifunction display of the
instrument cluster. Automatic transmission
175Driving and parking Z

Deactivating
If you have activated manual drive program
M, it will remain active for a certain amount of
time. Under certain conditions the minimum
amount of time is extended, e.g. in the case of lateral acceleration, during an overrun phase or when driving on steep terrain.
When manual drive program Mis deactivated,
the automatic transmission shifts into the
automatic drive program that was last selec-
ted.
You can also deactivate manual drive pro-
gram Myourself:
X Pull on the right-hand steering wheel gear-
shift paddle and hold it in place
(Y page 174).
or
X Use the DIRECT SELECT lever to shift the
transmission position.
or
X Use the program selector button to change
the drive program (Y page 173).
Manual drive program Mis deactivated.
The automatic transmission switches to
the previously activated drive program E
(drive program Con Mercedes-AMG vehi-
cles) or S. Manual drive program (Mercedes-
AMG vehicles)
General notes In this drive program, you can permanently
change gear yourself by using the steering
wheel gearshift paddles. The transmission
must be in position
D.
Manual drive program Mdiffers from drive
program Swith regard to spontaneity,
responsiveness and the smoothness of the
gear changes.
As well as this permanent drive program M,
you can also activate temporary drive pro-
gram M(Y page 175). Activating the manual drive program In manual drive program
M, you can change
gear yourself using the steering wheel gear-
shift paddles if the transmission is in position
D. The current drive program and the engaged
gear are shown in the multifunction display.
X Press the program selector button
(Y page 173) repeatedly until Mappears in
the multifunction display.
Upshifting !
In manual gearshift program
M, the auto-
matic transmission does not shift up auto-
matically even when the engine limiting
speed for the current gear is reached.
When the engine limiting speed is reached, the fuel supply is cut to prevent the engine
from overrevving. You must make sure that the engine speed does not reach the red
area of the rev counter. Otherwise, there is
a risk of engine damage. :
Gear indicator
; Upshift indicator
Before the engine speed reaches the red area, an upshift indicator will be shown in the mul-
tifunction display.
X When message ;appears in the multi-
function display, pull on the right-hand
steering wheel gearshift paddle. 176
Automatic transmissionDriving and pa
rking

Downshifting
X
Pull the left-hand steering wheel gearshift
paddle (Y page 174).
The automatic transmission shifts down to the next gear if this is permissible.
Maximum acceleration
X Pull the left-hand steering wheel gearshift
paddle until the transmission selects the
optimum gear for the current speed.
If you slow down or stop without shifting
down, the automatic transmission automati-
cally shifts down.
Deactivating the manual drive program X
Press the program selector button
(Y page 173) repeatedly until Cor S
appears in the multifunction display. Automatic transmission
177Driving and parking Z

The electric parking brake is also engaged
automatically if:
R DISTRONIC PLUS brings the vehicle to a
standstill or
R the HOLD function is keeping the vehicle
stationary
R Active Parking Assist is keeping the vehicle
stationary
In addition, at least one of the following con-
ditions must be fulfilled:
R there is a system malfunction
R the power supply is insufficient
R the vehicle is stationary for a lengthy period
The red !indicator lamp in the instrument
cluster lights up.
The electric parking brake is not automati-
cally applied if the engine is switched off by
the ECO start/stop function.
Releasing automatically The electric parking brake is released auto-
matically when all of the following conditions
are fulfilled:
R the engine is running
R the transmission is in position Dor R
R the seat belt is fastened
R you depress the accelerator pedal
If the automatic transmission is in position R,
the boot lid must be closed.
If your seat belt is not fastened, the following conditions must be fulfilled to automatically
release the electric parking brake:
R the driver's door is closed
R you have shifted out of transmission posi-
tion Por you have previously driven faster
than 3 km/h.
Ensure that you do not depress the acceler-
ator pedal unintentionally. Otherwise, the
parking brake will be released and the vehicle
will start to move. Emergency braking The vehicle can also be braked during an
emergency by using the electric parking
brake.
X While driving, push handle :of the electric
parking brake (Y page 183).
The vehicle is braked as long as you keep
handle :of the electric parking brake
pressed. The longer electric parking brake
handle :is depressed, the greater the
braking force.
During braking:
R a warning tone sounds
R the Release Release parking
parking brake
brakedisplay mes-
sage appears
R the red !indicator lamp in the instru-
ment cluster flashes
When the vehicle has been braked to a stand- still, the electric parking brake is applied. Parking up the vehicle
If you leave the vehicle parked up for longer
than four weeks, the battery may be damaged
by exhaustive discharging.
If you leave the vehicle parked up for longer
than six weeks, it may suffer from lack of use.
X Contact a qualified specialist workshop
and seek advice.
i You can obtain information about trickle
chargers from a qualified specialist work-
shop. Driving tips
General driving tips
G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably 184
Driving tipsDriving and parking

For safety reasons, Mercedes-Benz recom-
mends only fitting the following brake discs
and brake pads/linings:
R brake discs that have been approved by
Mercedes-Benz
R brake pads/linings that have been
approved by Mercedes-Benz or that are of
an equivalent standard of quality
Other brake discs or brake pads/linings can
compromise the safety of your vehicle.
Always replace all brake discs and brake
pads/linings on an axle at the same time.
Always fit new brake pads/linings when
replacing brake discs.
The vehicle is equipped with lightweight
brake discs to which the wheel assembly with
rim and threaded connection is matched.
The use of brake discs other than those
approved by Mercedes-Benz may alter track
width and is subject to approval, if applicable.
Shock-type loads when handling the brake
discs, such as when changing wheels, can
lead to a reduction in comfort when driving
with lightweight brake discs. Avoid shock-
type loads on the lightweight brake discs,
particularly on the brake plate.
AMG high-performance and ceramic
brakes The high-performance brake system is only
available on Mercedes-AMG vehicles.
The AMG brake systems are designed for
heavy loads. This may lead to noise when
braking. This is dependent on:
R speed
R braking force
R environmental conditions, such as temper-
ature and humidity
The wear of individual brake system compo-
nents such as the brake pads/linings or brake discs depends on individual driving style and
operating conditions.
For this reason, it is impossible to state a
mileage (service life) 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 Mercedes-
Benz Service Centre.
Brake pads/linings and discs that are either
new or have been replaced only achieve opti- mum braking effect after several hundred kil-
ometres of driving. Compensate for the
reduced braking effect by applying greater
force to the brake pedal. Always be aware of
this and adapt your driving and braking
accordingly during the running-in period.
Excessive heavy braking results in corre-
spondingly high brake wear. Observe the
brake wear warning lamp in the instrument
cluster and note any brake status messages
in the multifunction display. If you regularly
drive at high speeds, it is particularly impor-
tant to have the brake system checked and
maintained regularly. Driving on wet roads
Aquaplaning If water has accumulated to a certain depth
on the road surface, there is a danger of aqua-
planing occurring, even if:
R you are driving at low speeds
R the tyres have adequate tread depth
For this reason, drive in the following manner in the event of heavy rain or in conditions in
which aquaplaning can occur:
R lower your speed
R avoid tyre ruts
R avoid sudden steering movements
R brake carefully
Driving on flooded roads !
Bear in mind that vehicles travelling in
front or in the opposite direction create
waves. This may cause the maximum per-
missible water depth to be exceeded.
These notes must be observed under all
circumstances. You could otherwise dam- Driving tips
187Driving and parking Z

age the engine, the electronics or the trans-
mission.
If you must drive on stretches of road on
which water has collected, please bear in
mind that:
R in the case of standing water, the water
level must be no higher than the lower edge
of the vehicle body
R you should drive no faster than walking
pace Winter driving
G
WARNING
If you shift down on a slippery road surface in an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
This increases the risk of skidding and having
an accident.
Do not shift down for additional engine brak-
ing on a slippery road surface. G
DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There is a risk of
fatal injury.
If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open a window on the side of the vehicle that is not
facing into the wind.
Have your vehicle winterproofed at a qualified specialist workshop at the onset of winter.
You should drive particularly carefully on slip-
pery road surfaces. Avoid sudden accelera-
tion, steering and braking manoeuvres. Do
not use cruise control or DISTRONIC PLUS. If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Shift the transmission to position N.
X Try to bring the vehicle under control by
using corrective steering.
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freez-
ing point do not guarantee that the road sur-
face is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Further information on driving with snow
chains (Y page 379).
Further information on driving with summer
tyres (Y page 378).
Observe the notes in the "Winter operation"
section (Y page 378). Driving systems
Mercedes-Benz Intelligent Drive
Mercedes-Benz Intelligent Drive stands for
innovative driver assistance and safety sys-
tems which enhance comfort and support the
driver in critical situations. With these intelli-
gent co-ordinated systems Mercedes-Benz
has set a milestone on the path towards
autonomous driving.
Mercedes-Benz Intelligent Drive embraces all elements of active and passive safety in one
well thought-out system – for the safety of thevehicle occupants and that of other road
users.
Further information on driving safety systems (Y page 69). 188
Driving systemsDriving and parking

DISTRONIC PLUS has not detected the vehi-
cle cutting in yet. The distance to this vehicle will be too short.
Narrow vehicles DISTRONIC PLUS has not yet detected the
vehicle in front on the edge of the carriage-
way, because of its narrow width. The dis-
tance to the vehicle in front will be too short.
Obstructions and stationary vehicles DISTRONIC PLUS does not brake for obsta-
cles or stationary vehicles. If, for example, the
detected vehicle turns a corner and reveals
an obstacle or stationary vehicle, DISTRONIC PLUS will not brake for these. Crossing vehicles DISTRONIC PLUS may mistakenly detect
vehicles that are crossing your lane. Activat-
ing DISTRONIC PLUS at traffic lights with
crossing traffic, for example, could cause
your vehicle to pull away unintentionally.
DISTRONIC PLUS with Steering Assist
and Stop&Go Pilot General notes
DISTRONIC PLUS with Steering Assist and
Stop&Go Pilot aids you in keeping the vehicle
in the centre of the driving lane by means of
moderate steering interventions in a speed
range from 0 - 200 km/h.
It monitors the area in front of your vehicle by means of camera system :at the top of the
windscreen.
In a speed range from 0 - 60 km/h, Stop&Go
Pilot focuses on the vehicle in front, taking
into account lane markings, e.g. when follow- ing vehicles in a traffic jam.
At speeds of more than 60 km/h, Steering
Assist focuses on detected lane markings Driving systems
203Driving and parking Z

(left and right), only focusing on the vehicle in
front if detected lane markings are not pres-
ent.
If these conditions are not present, Steering
Assist and Stop&Go Pilot cannot provide
assistance.
DISTRONIC PLUS must be active in order for
the function to be available.
Important safety notes
If you fail to adapt your driving style,
DISTRONIC PLUS with Steering Assist and
Stop&Go Pilot can neither reduce the risk of
an accident nor override the laws of physics. It cannot take into account road, weather or
traffic conditions. DISTRONIC PLUS with
Steering Assist and Stop&Go Pilot is only an
aid. You are responsible for the distance to
the vehicle in front, for vehicle speed, for
braking in good time and for staying in lane.
DISTRONIC PLUS with Steering Assist and
Stop&Go Pilot does not detect road and traf-
fic conditions and does not detect all road
users. If you are following a vehicle which is
driving towards the edge of the carriageway,
your vehicle could come into contact with the
kerb or other road boundaries. Be particularly
aware of other road users, e.g. cyclists, that
are directly next to your vehicle.
Obstacles such as traffic pylons on the lane or projecting out into the lane are not detected.
An inappropriate steering intervention, e.g.
after intentionally driving over a lane marking,
can be corrected at any time if you steer
slightly in the opposite direction.
DISTRONIC PLUS with Steering Assist and
Stop&Go Pilot cannot continuously keep your vehicle in lane. In some cases, the steering
intervention is not sufficient to bring the vehi-
cle back to the lane. In such cases, you must steer the vehicle yourself to ensure that it
does not leave the lane. The support offered by the system may be
impaired if:
R there is poor visibility, e.g. due to insuffi-
cient illumination of the road, or due to
snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflection from other vehicles
(e.g. if the road surface is wet)
R the windscreen is dirty, misted up, dam-
aged or covered, for instance by a sticker,
in the vicinity of the camera
R no or several, unclear lane markings are
present for one lane, e.g. in a construction
area
R the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R the road is narrow and winding
R there are highly variable shade conditions
on the road
The system is switched to passive and no lon-
ger assists you by performing steering inter-
ventions if:
R you actively change lane
R you switch on the turn signal
R you take your hands off the steering wheel
or do not steer for a prolonged period of
time
i After you have finished changing lanes,
Steering Assist and Stop&Go Pilot are auto-
matically active again.
Steering Assist and Stop&Go Pilot cannot
provide assistance:
R on very sharp corners
R a loss of tyre pressure or a defective tyre
has been detected and displayed
Pay attention also to the important safety
notes for DISTRONIC PLUS (Y page 195).204
Driving systemsDriving and parking