ECU MERCEDES-BENZ S CLASS 2017 Service Manual

Display messages
Possible causes/consequences and P Solutions
Tir e Pressure Moni‐
tor Inoperative No
Wheel Sensor s The wheels mounte d do no t hav e a suitable tire pressur e sensor . The
tire pressur e monitor is deactivated.X
Moun t wheels wit h suitable tire pressur e sensors.
The tire pressur e monitor is activated automatically after drivin g for
a few minutes.
Tir e Press. Monito r
Inoperative The tire pressur e monitor is faulty.X
Visit a qualified specialist workshop .
Vehicle Display messages
Possible causes/consequences and P Solutions
Shift to 'P' or 'N'
to Start Engine You hav e attempte d to start th e engin e wit h th e transmission in posi-
tion R or D . X
Shift th e transmission to position P or N .
Apply Brake to
Shift fro m 'P' You hav e attempte d to mov e th e transmission selector lever to posi-
tion D , R or N without depressing th e brak e pedal .X
Depress th e brak e pedal .
To Deselect P or N,
Depres s Brake and
Start Engine Wit h th e engin e switched off , you hav e attempte d to shift th e trans -
mission out of position P or N int o another transmission position .X
Depress th e brak e pedal .X
Start th e engine.
Transmission Not in
P Ris k of Vehicl e
Rollin g Awa y The driver's door is open or no t full y closed and th e transmission is in
position R , N or D .
A warning tone also sounds.
G WARNIN G
The vehicl e may rol l away.
There is a ris k of an accident.X
Shift th e transmission to position P .X
Secur e th e vehicl e against rollin g away ( Y
page 162).X
Clos e th e driver's door completely.
Onl y Shift to 'P'
whe n Vehicl e is Sta ‐
tionar y The vehicl e is moving .X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Shift th e transmission to position P .254
Display messages
On-board computer and displays

Display messages
Possible causes/consequences and P Solutions
Servic e Required Do
Not Shift Gears
Visit Dealer You canno t chang e th e transmission position due to a malfunction .
A warning tone also sounds.
If transmission position D is selected:X
Drive to a qualified specialist workshop without shifting th e trans -
mission from position D .
If transmission position R , N or P is selected:X
Secur e th e vehicl e against rollin g away ( Y
page 162).X
Notify a qualified specialist workshop or breakdown service.
Reversing Not Possi‐
ble Servic e Required You canno t shift int o th e transmission position R due to a malfunction .
The transmission position s P , N or D continu e to be available.
A warning tone also sounds. X
Visit a qualified specialist workshop .
Transmission Mal ‐
function Sto p A malfunction has occurred in th e mechanical transmission compo -
nents.
A warning tone also sounds. The gearbox automatically shift s to posi-
tion N . X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Shift th e transmission to position P .X
Secur e th e vehicl e against rollin g away ( Y
page 162).X
Notify a qualified specialist workshop or breakdown service.
Sto p Vehicl e Leave
Engine Runnin g Wai t
Transmission Cool‐
ing The transmission has overheated. Pullin g away can be temporarily
impaire d or no t possible.X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions. Do no t continu e drivin g
under any circumstances. X
Wait until th e display message disappear s before pullin g away.
Auxiliary Batter y
Malfunction The auxiliary battery for th e transmission is no longer bein g charged.X
Visit a qualified specialist workshop .X
Unti l then , set th e transmission to position P before you switch off
th e engine. X
Befor e leaving th e vehicle, apply th e electric parking brake.

Safety systems Warning/
indicator
lamp Q Signal type
Possible causes/consequences and P Solutions
'M
Q ' (USA only) or M (Canada only): the red brake system warning lamp is
lit while the engine is running.
A warning tone also sounds.
G WARNING
The brake boosting effect is malfunctioning and the braking characteristics may be
affected.
There is a risk of an accident. X
Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances. X
Secure the vehicle against rolling away ( Y
page 162).X
Consult a qualified specialist workshop. X
Observe the additional display messages in the multifunction display.
'M
Q ' (USA only) or M (Canada only): the red brake system warning lamp is
lit while the engine is running.
A warning tone also sounds.
There is not enough brake fluid in the brake fluid reservoir.
G WARNING
The braking effect may be impaired.
There is a risk of an accident. X
Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances. X
Secure the vehicle against rolling away ( Y
page 162).X
Do not add brake fluid. Adding more will not correct the malfunction. X
Consult a qualified specialist workshop. X
Observe the additional display messages in the multifunction display.
'
Q USA only: the red brake system warning lamp is lit while the engine is running.
The multifunction display also shows a display message with the & symbol.
The brake pads/linings have reached their wear limit. X
Visit a qualified specialist workshop.260
Warning and indicator lamps in the instrument cluster
On-board computer and displays

Tires Warning/
indicator
lamp Q Signal type
Possible causes/consequences and P Solutions
w
Q The yellow combination low tire pressure telltale/TPMS malfunction telltale for
the TPMS (pressure loss or malfunction) is lit.
The tire pressure monitor has detected a loss of pressure in at least one of the tires.
G WARNING
Tire pressures that are too low pose the following hazards: R
they may burst, especially as the load and vehicle speed increase. R
they may wear excessively and/or unevenly, which may greatly impair tire trac-
tion. R
the driving characteristics, as well as steering and braking, may be greatly
impaired.
There is a risk of an accident. X
Stop the vehicle without making any sudden steering or braking maneuvers. Pay
attention to the traffic conditions as you do so. X
Secure the vehicle against rolling away ( Y
page 162).X
Observe the additional display messages in the multifunction display. X
Check the tires and, if necessary, follow the instructions for a flat tire
( Y
page 327). X
Check the tire pressure ( Y
page 349).X
If necessary, correct the tire pressure.
w
Q The yellow combination low tire pressure telltale/TPMS malfunction telltale for
the TPMS (pressure loss or malfunction) flashes for approximately one minute and
then remains lit.
The tire pressure monitor is faulty.
G WARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident. X
Observe the additional display messages in the multifunction display. X
Visit a qualified specialist workshop immediately.Warning and indicator lamps in the instrument cluster 267
On-board computer and displays Z

You can map the route to the destination
yourself with up to four intermediate destina-
tions. R
select destinations from Mercedes-Benz
Apps R
select geo-coordinates
Calculating the route Prerequisite: the address has been entered and
is in the menu. X
Select Start or Continue .
The route is calculated with the selected route
type and the selected route options.
If route guidance has already been activated,
a prompt will appear asking whether you wish
to end the current route guidance. X
Select Yes or Set as Intermediate Des‐
tination .
Yes cancels the current route guidance and
starts route calculation to the new destina-
tion.
Set as Intermediate Destination adds
the new destination in addition to the existing
destination and opens the intermediate des-
tinations list.
Connecting a mobile phone
Requirements For telephony via the Bluetooth ®
interface, you
require a Bluetooth ®
-capable mobile phone. The
mobile phone must support Hands-Free Profile
1.0 or above. You can also connect your mobile
phone via NFC ( N ear F ield C ommunication) with
the multimedia system. For more information
(see the Digital Operator's Manual).
Multimedia system: X
Select Vehicle { System Set‐
tings { Activate Bluetooth .X
Activate Bluetooth ®
s .
Mobile phone: X
Activate Bluetooth ®
and, if necessary, Blue-
tooth ®
visibility for other devices (see the
manufacturer's operating instructions).
The Bluetooth ®
device names for all of one man-
ufacturer's products might be identical. To
make it possible to clearly identify your mobile phone, change the device name (see the man-
ufacturer's operating instructions).
If the mobile phone supports the PBAP ( P hone
B ook A ccess P rofile) and MAP ( M essage
A ccess P rofile) Bluetooth ®
profiles, the follow-
ing information will be transmitted after you
connect: R
Phone book R
Call lists R
Messages
i Further information on suitable mobile
phones can be found at: http://
www.mercedes-benz.com/connect
i In the USA, you can get in touch with the
Mercedes-Benz Customer Assistance Center
on 1-800-FOR-MERCedes (1-800-367-6372).
In Canada, you can get in touch with the Cus-
tomer Relations Center on 1-800-387-010 0.
Searching for and authorizing a mobile
phone Before using your mobile phone without NFC
with the multimedia system, you will need to
search for the phone and then authorize it.
Depending on the mobile phone, authorization
either takes place by means of Secure Simple
Pairing or by entering a passkey. The multimedia
system automatically makes the procedure that
is relevant for your mobile phone available. The
mobile phone is always connected automati-
cally after authorization. Further information on
using a mobile phone with the multimedia sys-
tem (see the Digital Operator's Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular
security settings on your mobile phone (see the
manufacturer's operating instructions).
Only one mobile phone can be connected to the
multimedia system at any one time.
Searching for a mobile phone
Multimedia system: X
Select Phone { Connect Device .X
Select Search for Phones .X
Select Start Search .
The available mobile phones are displayed in
the device list.Operating system 277
Multimedia system Z

Stowage areas
Loading guidelines
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
G WARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
G WARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
The handling characteristics of a laden vehicle
are dependent on the distribution of the load
within the vehicle. For this reason, you should
observe the following notes when transporting a
load: R
Never exceed the maximum permissible
gross vehicle mass or the gross axle weight
rating for the vehicle (including occupants).
The values are specified on the vehicle iden- tification plate on the B-pillar of the driver's
door. R
The trunk is the preferred place to carry
objects. R
Position heavy loads as far forwards as pos-
sible and as low down in the trunk as possible. R
The load must not protrude above the upper
edge of the seat backrests. R
Always place the load behind unoccupied
seats if possible. R
Secure the load with sufficiently strong and
wear-resistant tie-downs. Pad sharp edges for
protection.
Stowage spaces
Important safety notes
G WARNING
If objects in the passenger compartment are
stowed incorrectly, they can slide or be
thrown around and hit vehicle occupants. In
addition, cupholders, open stowage spaces
and mobile phone brackets cannot always
retain all objects they contain. There is a risk
of injury, particularly in the event of sudden
braking or a sudden change in direction. R
Always stow objects so that they cannot be
thrown around in such situations. R
Always make sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets. R
Close the lockable stowage spaces before
starting a journey. R
Always stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk.
Observe the loading guidelines ( Y
page 281).Stowage areas 281
Stowage and features Z

Stowage nets Stowage nets are located: R
in the front-passenger footwell R
on the back of the driver's and front-
passenger seat R
on the left and right-hand side in the trunk
Observe the loading guidelines ( Y
page 281)
and the safety notes regarding stowage spaces
( Y
page 281).
Skibag
Important safety notes
G WARNING
The skibag in conjunction with the lashing
straps cannot restrain any objects other than
skis.
Vehicle occupants could be struck in the
event of sudden braking or an accident, for
instance, if you: R
transport other heavy or sharp-edged
objects in the skibag R
do not secure the skibag with the lashing
straps
There is a risk of accident and injury.
Store only skis in the skibag. Always secure
the skibag with the lashing straps so that it
cannot move around.
Observe the following points when using the
skibag: R
do not transport more than three pairs of skis
in the skibag. R
when carefully sliding the skis into or remov-
ing them from the skibag, mind the sharp
edges and corners of the skis. R
stow the skis as described in the following: -
when sliding the skis in, position the run-
ning surfaces of the respective pair of skis
together. -
position one pair of skis at the bottom with
the tips of the skis pointing to the outside. -
position the two additional pairs of skis on
the left and right-hand sides above the
lower pair of skis. The tips of the skis being
offset by 90° to the tips of the skis below. Unfolding the skibag and loading skis
Vehicles with a rear bench seat
Vehicles with electrically adjustable outer seats X
Vehicles with electrically adjustable
outer seats: fully retract the center head
restraint ( Y
page 111). X
Fold down the rear seat armrest. X
Pull handle C and fold down cover D .Stowage areas 285
Stowage and features Z

Vehicles with a rear bench seat
Vehicles with electrically adjustable outer seats X
Release the Velcro fasteners on skibag C .X
Pull skibag C into the vehicle interior and
unfold it. X
Open the trunk lid.
X
Pull handle C on the flap.X
Fold the flap to the side until it is held in place
by the magnet. X
Slide the skis into the skibag from the trunk. X
Pull strap C tight by the loose end until the
skis are held firmly inside the skibag.
Vehicles with a rear bench seat
Vehicles with electrically adjustable outer seats X
Engage hook D in securing ring

X
Close the flap in the trunk.X
Fold up the sk ibag using the folding aid and
close it wit h the Velcro fasteners.X
Put the sk ibag into the backrest.X
Fold the cover back up.
You should close the flap in the trunk if you do
not require the skibag. This will prevent unau-
thorized access to the trunk from the veh icle
interior.
Removing the skibag
If you would lik e to clean or dry the skibag, it can
be remove d.X
Open the trunk. X
Open flap C .X
Release the sk ibag at catch D and remove.
When the sk ibag has been remove d, you can use
the through- loadin g fac ilit y for st owin g loads.
Bag hook in the trunk
G WAR NING
The bag hooks cannot restrain heavy objects
or items of luggage. Objects or items of lug-
gage could be flung around and there by hit
veh icle occupants when braking or abrupt ly
changing dire ctions. There is a risk of injury.
On ly hang light objects on the bag hooks.
Never hang hard, sharp-edged or fragile
objects on the bag hooks.
! The bag hook can bear a maximum load of
6. 6lbs (3kg) and should not be used to secure
a load. X
Pull bag hook D down by tab C .
EASY-PACK trunk box
Important safety notes
G WARNING
When the load surface moves up, your hands
may become trapped on the frame of the
EASY-PA CK trunk box. There is a risk of injury.
When the load surface moves up, make sure
that your hands are not wit hin the sweep of
the load surface. If someone becomes trap-
ped, carefully push the center of the load sur-
face down ward.
! When the EASY-PACK trunk box is exten-
ded, objects may neither be placed on the
frame of the box nor pushed down onto the
frame from above. The box may otherwise be
damaged.
! Sharp-edge d, pointed or fragile objects can
damage the EASY-PA CK trunk box and may be
thrown out. There is a risk of injury.
Do not transport sharp-edged, pointed or
fragile objects in the EASY-PACK trunk box.
Always store and secure these or similar
objects in the trunk out side the EASY-PACK
trunk box.
! If you exceed the maximum permitted load
of the EASY-PACK trunk box, objects may be
thrown out of the EASY-PACK trunk box and
strike vehicle occupants. There is a risk of
injury, particularly in the event of sudden
braking or a sudden change in direction.
Alwa ys observe the maximum permitted load
of the EASY-PA CK trunk box. Alwa ys storeStowage areas 287
Stowage and features Z

and secure heavy objects in the trunk outside
the EASY-PACK trunk box.
The maximum permitted load of the EASY-PACK
trunk box is 22 lbs (10 kg). With a load of above
approximately 11 lbs (5 kg), the bottom of the
box moves downwards until it rests on the mat
of the trunk floor. Thus, overloading of the box is
avoided.
Adjusting the height to any position
Example X
Pull the box out by handle C in the direction
of the arrow as far as it will go. X
To lower the load surface: push down with
your hand in the center of load surface D in
the direction of the arrow until load sur-
face D has reached the desired position.X
To raise the load surface: press switch